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Nexen Inc. Delivers Record Fourth Quarter and Annual Financial Results in 2005.


CALGARY Calgary (kăl`gərē), city (1991 pop. 710,677), S Alta., Canada, at the confluence of the Bow and Elbow rivers. The largest city in Alberta and the fastest-growing major city in Canada, Calgary is a corporate, transportation, and financial , Alberta Alberta (ălbûr`tə), province (2001 pop. 2,974,807), 255,285 sq mi (661,188 sq km), including 6,485 sq mi (16,796 sq km) of water surface, W Canada.  -- 2005 Highlights:

- Record annual earnings increased 45% over 2004 to $4.43/share; fourth quarter $1.15/share

- Record annual cash flow increased 24% over 2004 to $9.23/share; fourth quarter $2.96/share

- 2005 production targets achieved, even after dispositions and hurricane hurricane, tropical cyclone in which winds attain speeds greater than 74 mi (119 km) per hr. Wind speeds reach over 190 mi (289 km) per hr in some hurricanes.  disruptions

- Proved reserve additions of 82 million boe replace 93% of production

- Significant exploration success in the deep-water deep-wa·ter
adj.
Of, relating to, or carried on in waters of a relatively great depth: a deep-water port; deep-water drilling for oil.

Adj. 1.
 Gulf of Mexico Noun 1. Gulf of Mexico - an arm of the Atlantic to the south of the United States and to the east of Mexico
Golfo de Mexico

Atlantic, Atlantic Ocean - the 2nd largest ocean; separates North and South America on the west from Europe and Africa on the east
 with a potential world-class world-class
adj.
1. Ranking among the foremost in the world; of an international standard of excellence; of the highest order: a world-class figure skater.

2.
 discovery at Knotty Head Knotty Head is the deepest oil well drilled in the Gulf of Mexico. It is drilled in 3,500 feet of water and 30,589 feet below the sea floor. It is owned jointly by Chevron, Anadarko Petroleum Corporation, BHP Billiton and Nexen Inc. with each having 25% of the share.

- Raised approximately ap·prox·i·mate  
adj.
1. Almost exact or correct: the approximate time of the accident.

2.
 $1.4 billion from the disposition Act of disposing; transferring to the care or possession of another. The parting with, alienation of, or giving up of property. The final settlement of a matter and, with reference to decisions announced by a court, a judge's ruling is commonly referred to as disposition, regardless of  of Canadian Canadian (kənā`dēən), river, 906 mi (1,458 km) long, rising in NE New Mexico. and flowing E across N Texas and central Oklahoma into the Arkansas River in E Oklahoma.  conventional assets and the partial disposition of chemicals business

- Major projects continue on schedule-production before royalties Not to be confused with Royal family.

Royalties (sometimes, running royalties) are usage-based payments made by one party (the "licensee") to another (the "licensor") for ongoing use of an asset, most typically an intellectual property (IP) right.
 expected to grow to between 300,000 and 350,000 boe/d in 2007
Three Months Ended  Twelve Months Ended
                                    December 31          December 31
                            -------------------  --------------------
(Cdn$ millions)                  2005      2004       2005      2004
---------------------------------------------------------------------
Production (mboe/d)(1)
 Before Royalties                 225       256        242       250
 After Royalties                  165       183        173       174
Net Sales                       1,073       892      4,086     3,251
Cash Flow from Operations(2)      772       592      2,403     1,942
 Per Common Share ($/share)(2)   2.96      2.29       9.23      7.55
Net Income                        300       246      1,152       793
 Per Common Share ($/share)      1.15      0.95       4.43      3.08
Capital Expenditures              731       668      2,691     1,754
---------------------------------------------------------------------

(1) Production and reserves in this release also include our share of
    Syncrude oil sands. US investors should read the Cautionary Note
    to US Investors at the end of this release.
(2) For reconciliation of this non-GAAP measure, see Cash Flow from
    Operations on pg. 11.



Strong commodity prices, together with attractive cash operating margins Operating Margin

A ratio used to measure a company's pricing strategy and operating efficiency.

Calculated by:
 and outstanding marketing contributions boosted our financial results to record levels for the fourth quarter and the year.

Higher crude oil and natural gas prices combined with strong operating performance resulted in a record year for cash flow and net income in 2005. The benchmark A performance test of hardware and/or software. There are various programs that very accurately test the raw power of a single machine, the interaction in a single client/server system (one server/multiple clients) and the transactions per second in a transaction processing system.  WTI WTI West Texas Intermediate
WTI Western Transportation Institute (Montana State University)
WTI World Tribunal on Iraq
WTI With The Idea (used in chess to point to the idea behind a specific move) 
 crude oil price increased 37% in 2005. Wider crude oil differentials world wide and a stronger Canadian dollar Noun 1. Canadian dollar - the basic unit of money in Canada; "the Canadian dollar has the image of loon on one side of the coin"
loonie

dollar - the basic monetary unit in many countries; equal to 100 cents
 limited our year over year increase in product realizations to 28%.

Fourth quarter cash flow was a record $772 million, while net income was $300 million. Strong commodity prices and pre-tax pre-tax adjanterior al impuesto

pre-tax adjavant impôt(s)

pre-tax adjal lordo d'imposta 
 income of $182 million from our marketing division led to this exceptional performance. In the third quarter, we recorded a pre-tax loss of $162 million in marketing, largely because we could not recognize $195 million of income related to certain physical assets. In the fourth quarter, we recognized approximately $150 million of this income, and expect to recognize the balance in 2006.

Stock-based compensation expense in the fourth quarter was $40 million, reducing cash flow from operations Cash flow from operations

A firm's net cash inflow resulting directly from its regular operations (disregarding extraordinary items such as the sale of fixed assets or transaction costs associated with issuing securities), calculated as the sum of net income plus noncash expenses
 by $19 million. During the year, our stock price increased 128%, adding over $8 billion in shareholder value. As a result, $490 million ($322 million after tax) of stock-based compensation was recognized. The $322 million expense represents approximately 4% of the increase in shareholder value. Approximately 16% of this expense was in cash, while the balance represents the change in value of our accrued ac·crue  
v. ac·crued, ac·cru·ing, ac·crues

v.intr.
1. To come to one as a gain, addition, or increment: interest accruing in my savings account.

2.
 stock-based compensation.

During the fourth quarter, we recorded exploration expense of $86 million which included seismic expense and costs for the Polecat polecat, carnivorous mammal of the weasel family. The name refers especially to the common Old World polecat, Mustela putorius, found in wooded areas of N Eurasia and N Africa. , Black Horse and Bennachie Bennachie is the most northeasterly mountain in Aberdeenshire. It has several summits, the highest of which, Oxen Craig, has a height of 528 m (1733 feet).  wells in the North Sea, the Castleton well in the Gulf of Mexico, and three wells in Yemen Yemen (yĕm`ən), officially Republic of Yemen, republic (2005 est. pop. 20,727,000), 207,300 sq mi (535,800 sq km), SW Asia, at the southern edge of the Arabian peninsula. .

"I am very pleased with our performance in 2005," commented Charlie Fischer Fi·scher , Hans 1881-1945.

German chemist known for his research on the components of blood. He won a 1930 Nobel Prize for his work on the synthesis of hemin.
, Nexen's President and Chief Executive Officer. "We met our production and cash flow targets, progressed our major projects at Buzzard buzzard, common name for hawks of the genus Buteo and the genus Pernis, or honey buzzard, of the Old World family Accipitridae. Honey buzzards feed on insects, wasp and bumblebee larvae, and small reptiles.  and Long Lake, disposed dis·pose  
v. dis·posed, dis·pos·ing, dis·pos·es

v.tr.
1. To place or set in a particular order; arrange.

2.
 of assets at attractive prices, and realized exploration success in the Gulf of Mexico. Our success last year positions us well for an exciting 2006 as we complete Syncrude's Stage 3 expansion and our North Sea Buzzard development, make strong progress at Long Lake and evaluate our recent discoveries."
Oil and Gas Production

                             Production before      Production after
                                     Royalties             Royalties

                             Fourth      Third     Fourth      Third
Crude Oil, NGLs and         Quarter    Quarter    Quarter    Quarter
Natural Gas (mboe/d)           2005       2005       2005       2005
-----------------------------------------------  --------------------
Yemen                           108        114         60         61
North Sea                        22         12         22         12
Canada                           39       45(1)        31       36(1)
United States                    35         39         31         33
Other Countries                   5          5          5          5
Syncrude                         16         17         16         17
                     --------------------------  --------------------
Total                           225        232        165        164
                     --------------------------  --------------------

(1) Third quarter volumes include approximately 6,500 boe/d before
    royalties and 4,800 boe/d after royalties of production related
    to asset dispositions completed in the third quarter of 2005.



Fourth-quarter production before royalties was lower than in the third quarter as a result of declining production from our Masila fields in Yemen, asset sales in Canada Canada (kăn`ədə), independent nation (2001 pop. 30,007,094), 3,851,787 sq mi (9,976,128 sq km), N North America. Canada occupies all of North America N of the United States (and E of Alaska) except for Greenland and the French islands of  and lost production from hurricanes in the Gulf of Mexico. In the Gulf, hurricane disruptions are expected to cost us approximately $200 million in shut-in shut-in
n.
A person confined indoors by illness or disability.

adj.
1. Confined to a home or hospital, as by illness.

2. Disposed to avoid social contact; excessively withdrawn or introverted.
 production, insurance-related costs, damages and drilling delays. The majority of these costs will be recovered through insurance claims and future production of shut-in volumes. The storms and damage to third-party infrastructure reduced our fourth-quarter volumes by approximately 11,000 boe/d with an annualized annualized

Of or relating to a variable that has been mathematically converted to a yearly rate. Inflation and interest rates are generally annualized since it is on this basis that these two variables are ordinarily stated and compared.
 loss of 6,000 boe/d in 2005. This was offset by stronger North Sea production following a major turnaround Turnaround

A situation where a company that has had poor performance for an extended period of time experiences a positive reversal.

Notes:
A speculator may profit from a turnaround if he or she accurately anticipates the improvement of a poorly performing company.
 earlier in the year at the Scott platform, and start-up Start-up

The earliest stage of a new business venture.
 of the Farragon field. Production after royalties increased between the third and fourth quarter as we added royalty-free Royalty-free describes material (typically graphics such as stock photography and icons, but also sound such as music loop samples) that may be used for profit, without paying royalties.  production from the North Sea.
Production before      Production after
                                     Royalties             Royalties

Crude Oil, NGLs and          Annual     Annual     Annual     Annual
Natural Gas (mboe/d)           2005       2004       2005       2004
-----------------------------------------------  --------------------
Yemen                           113        107         61         54
North Sea                        16          2         16          2
Canada                         50(1)      61(1)      40(1)      47(1)
United States                    42         55         36         47
Other Countries                   5          8          5          7
Syncrude                         16         17         15         17
                     --------------------------  --------------------
Total                           242        250        173        174
                     --------------------------  --------------------

(1) Annual volumes include approximately 10,700 boe/d before
    royalties and 8,100 boe/d after royalties of production related
    to asset dispositions for 2005 and 19,500 boe/d before royalties
    and 14,500 boe/d after royalties for 2004.



Our annual production averaged 242,000 boe/d (173,000 boe/d after royalties). Production from Block 51 in Yemen and the North Sea largely offset declines at Masila, in the Gulf of Mexico, and in Canada where we sold assets earlier in the year.

"Our production was above the mid-point of our initial guidance, even after asset sales in Canada and hurricane induced induced /in·duced/ (in-dldbomacst´)
1. produced artificially.

2. produced by induction.

induced,
adj artificially caused to occur.


induced

induction.
 production interruptions in the Gulf of Mexico," commented Fischer. "With most of our Gulf of Mexico production restored and strong performance from Syncrude This article is about Syncrude Canada Ltd.. For synthetic crude oil, see synthetic crude.
Syncrude Canada Ltd. is the world's largest producer of synthetic crude oil from oil sands and the largest single source producer in Canada.
 and the North Sea, we averaged 238,000 boe/d in December December: see month. . This has enabled us to get off to a great start in 2006 and keeps us on track to meet our production target of between 220,000 and 240,000 boe/d before royalties for the year. Incremental Additional or increased growth, bulk, quantity, number, or value; enlarged.

Incremental cost is additional or increased cost of an item or service apart from its actual cost.
 volumes from Syncrude by mid-year and first production from Buzzard toward the end of the year will contribute strongly to our performance this year."

Dispositions Generate Attractive Returns

In the third quarter, we sold Canadian conventional oil and gas properties, which were producing approximately 18,300 boe/d, at attractive prices of approximately $51,000 per daily barrel barrel: see English units of measurement.  and $18.50 per boe of proved reserves proved reserves

The quantity of minerals expected to be recoverable under current economic and operating conditions. The amount of proved reserves is important in valuing the stock of a company with significant holdings in natural resources.
. Proceeds of $946 million (before closing adjustments) were realized from these sales. We also converted our chemicals business to Canexus Income Fund and raised $500 million from the sale of approximately 39% of this income trust to the public.

Capital Strategy - Investing in Long-Term Long-term

Three or more years. In the context of accounting, more than 1 year.


long-term

1. Of or relating to a gain or loss in the value of a security that has been held over a specific length of time. Compare short-term.
, High-Value Production Growth

"We are building sustainable businesses A business is sustainable if it has adapted its practices for the use of renewable resources and holds itself accountable for the environmental and human rights impacts of its activities.  in the deep-water Gulf of Mexico, Athabasca oil sands The Athabasca Oil Sands are a large deposit of oil-rich bitumen located in northern Alberta, Canada. These oil sands consist of a mixture of crude bitumen (a semi-solid form of crude oil), silica sand, clay minerals, and water. , North Sea, Middle East and offshore West Africa West Africa

A region of western Africa between the Sahara Desert and the Gulf of Guinea. It was largely controlled by colonial powers until the 20th century.



West African adj. & n.
," said Fischer. "While our projects tend to have longer cycle-times and require significant upfront capital investment, they provide significant opportunity for long-term growth and generate attractive full-cycle returns."

At the end of 2005, we had over $4 billion of capital invested in multi-year development projects not yet producing oil or cash flow. This amount is expected to peak in late-2006 at approximately $5 billion, as we bring Buzzard on stream and approach completion of the Long Lake project.

To date, we have recognized 231 mmboe of proved reserves for our long cycle-time projects at Buzzard, the Syncrude Stage 3 expansion and coal bed methane methane (mĕth`ān), CH4, colorless, odorless, gaseous saturated hydrocarbon; the simplest alkane. It is less dense than air, melts at −184°C;, and boils at −161.4°C;.  (CBM CBM Commodore Business Machines
CBM Coalbed Methane
CBM Christoffel Blindenmission
CBM Condition Based Maintenance
CBM Confidence-Building Measures
CBM Curriculum Based Measurement (education)
CBM Cubic Meter
). No proved reserves have been recognized for our insitu oilsands project at Long Lake where we have invested over $1.2 billion to date. We have recognized 645 mmboe of probable PROBABLE. That which has the appearance of truth; that which appears to be founded in reason.   reserves for Long Lake, Buzzard, Syncrude Stage 3, CBM and the Usan discovery offshore West Africa. We expect additional reserves to be recognized from these projects in the future, as we invest additional capital and establish strong production performance from the projects.

The incremental production and cash flow from this investment will be impressive. Overall, we expect our 2007 production, after royalties, to grow by more than 50% compared to current volumes. We have assumed exploration success contributes very little volume to these estimates, given the longer cycle-times associated with our exploration projects.

Most of our new production is subject to little or no royalty Compensation for the use of property, usually copyrighted works, patented inventions, or natural resources, expressed as a percentage of receipts from using the property or as a payment for each unit produced.  payments as we recover our investment, and generates significantly higher cash margins than our current production. As a result, we expect our production after royalties to increase from 173,000 boe/d in 2005 to between 260,000 and 280,000 boe/d in 2007. All of our major projects return their cost of capital at oil prices in the US$20s per barrel.

2005 Reserves and Capital Results

In 2005, we invested $2.6 billion in oil and gas activities adding 82 mmboe of proved reserves, and replacing 93% of our production. During 2005, we also disposed of 49 mmboe of proved reserves.
2005 Oil and Gas Investment(1) ($mm)
---------------------------------------------------------------------
                            Core Asset          Major    Early Stage
                           Development    Development    Development
---------------------------------------------------------------------
Canada                             130             33             10
United States                      144              4              -
International                      173            630             13
Synthetic                            -            743             31
                        ---------------------------------------------
Total Oil and Gas                  447          1,410             54
Mining (Syncrude)                   57            140              -
                        ---------------------------------------------
Total Including Mining             504          1,550             54
                        ---------------------------------------------
% of Total                          19%            59%             2%
---------------------------------------------------------------------


                                 2005 Oil and Gas Investment(1) ($mm)
---------------------------------------------------------------------
                                          Proved Property
                           Exploration       Acquisitions    Total(2)
---------------------------------------------------------------------
Canada                              81                 17        271
United States                      235                  3        386
International                      177                  -        993
Synthetic                           16                  -        790
                        ---------------------------------------------
Total Oil and Gas                  509                 20      2,440
Mining (Syncrude)                    -                  -        197
                        ---------------------------------------------
Total Including Mining             509                 20      2,637
                        ---------------------------------------------
% of Total                          19%                 1%       100%
---------------------------------------------------------------------

(1) Geological and geophysical expenditures of $53 million are
    included.
(2) Non-oil and gas investments totaled $54 million. Total 2005
    capital investment was $2,691 million.


--------------------------------------------------------------------
                               2005 Reserve Continuity
--------------------------------------------------------------------
                                Oil and Gas Activities
--------------------------------------------------------------------
                            International                   US
---------------------------------------------------------------------
                                             Other
                   Yemen       North Sea      Intl
mmboe                Oil     Oil      Gas      Oil      Oil      Gas
---------------------------------------------------------------------

PROVED RESERVES (1)

Dec. 31, 2004        133     128        2       12       60       43
Extensions and
 Discoveries          11       5        1        1        1       12
Acquisitions           -       -        -        -        -        -
Dispositions           -       -        -        -        -        -
Revisions              3      15        -        -       (6)      (4)
Production        (42)(4)     (5)      (1)      (2)      (8)      (8)
                 ----------------------------------------------------
Dec. 31, 2005        105     143        2       11       47       43
                 ----------------------------------------------------

PROBABLE RESERVES (1),(2)

Dec. 31, 2004         49     117        6       89        6        8
Extensions,
 Discoveries
 & Conversions         -      33        1       15        4        2
Acquisitions           -       -        -        -        -        -
Dispositions           -       -        -        -        -        -
Revisions            (23)     21        1      (20)      (1)       -
                 ----------------------------------------------------
Dec. 31, 2005         26     171        8       84        9       10
                 ----------------------------------------------------

PROVED + PROBABLE
 RESERVES (1),(2)

Dec. 31, 2004        182     245        8      101       66       51
Extensions,
 Discoveries
 & Conversions        11      38        2       16        5       14
Acquisitions           -       -        -        -        -        -
Dispositions           -       -        -        -        -        -
Revisions            (20)     36        1      (20)      (7)      (4)
Production        (42)(4)     (5)      (1)      (2)      (8)      (8)
                 ----------------------------------------------------
Dec. 31, 2005        131     314       10       95       56       53
                 ----------------------------------------------------


--------------------------------------------------------------------
                              2005 Reserve Continuity
---------------------------------------------------------------------
                   Oil and Gas Activities            Mining    Total
-------------------------------------------- Total  ---------    Oil,
                          Canada               Oil               Gas
--------------------------------------------   and Syncrude(3)   and
mmboe             Oil      Gas      Bitumen    Gas            Mining
---------------------------------------------------------------------

PROVED RESERVES (1)

Dec. 31, 2004      92       72            -    542        301    843
Extensions and
 Discoveries        4        8            -     43         23     66
Acquisitions        2        -            -      2          -      2
Dispositions      (32)     (17)           -    (49)         -    (49)
Revisions           4        2            -     14          -     14
Production        (11)      (7)           -    (84)        (6)   (90)
                 ----------------------------------------------------
Dec. 31, 2005      59       58            -    468        318    786
                 ----------------------------------------------------

PROBABLE RESERVES (1),(2)

Dec. 31, 2004      39       24          400    738         69    807
Extensions,
 Discoveries &
 Conversions       (1)      35            -     89        (18)    71
Acquisitions        -        -            -      -          -      -
Dispositions      (10)      (3)           -    (13)         -    (13)
Revisions          (5)      (3)           -    (30)         -    (30)
                 ----------------------------------------------------
Dec. 31, 2005      23       53          400    784         51    835
                 ----------------------------------------------------

PROVED + PROBABLE
 RESERVES (1),(2)

Dec. 31, 2004     131       96          400  1,280        370  1,650
Extensions,
 Discoveries &
 Conversions        3       43            -    132          5    137
Acquisitions        2        -            -      2          -      2
Dispositions      (42)     (20)           -    (62)         -    (62)
Revisions          (1)      (1)           -    (16)         -    (16)
Production        (11)      (7)           -    (84)        (6)   (90)
                 ----------------------------------------------------
Dec. 31, 2005      82      111          400  1,252        369  1,621
                 ----------------------------------------------------

(1) We internally evaluate all of our reserves and have at least 80%
    of our proved reserves assessed by independent qualified
    consultants each year. Our reserves are also reviewed and
    approved by our Reserves Committee and our Board of
    Directors. Reserves represent our working interest before
    royalties at year-end constant pricing using SEC rules.
    Gas is converted to equivalent oil at a 6:1 ratio.
(2) Probable reserves are determined according to SPE/WPC
    definitions. US investors should read the Cautionary Note to US
    Investors at the end of this release.
(3) US investors should read the Cautionary Note to US Investors at
    the end of this release.
(4) Production includes volumes used for fuel in Yemen.



Major and Early Stage Development Projects

Approximately 60% of our 2005 invested capital was directed towards early stage and major development projects including Buzzard, Long Lake, Syncrude Stage 3, Yemen Block 51 and CBM. These projects added approximately 45 mmboe and are characterized char·ac·ter·ize  
tr.v. character·ized, character·iz·ing, character·iz·es
1. To describe the qualities or peculiarities of: characterized the warden as ruthless.

2.
 by multi-year investments which result in timing differences between reserve additions and capital expenditures.

Synthetic Synthetic

A financial instrument that is created artificially by simulating another instrument with the combined features of a collection of other assets.

Notes:
 Crude Oil

We invested approximately $774 million to develop our insitu oil sands resource in 2005. This included $743 million invested at Long Lake. We have not recognized any proved bitumen bitumen (bĭty`mən) a generic term referring to flammable, brown or black mixtures of tarlike hydrocarbons, derived naturally or by distillation from petroleum.  reserves. Although the integrated process we are using at Long Lake will produce high-quality synthetic crude oil, the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area.  Securities and Exchange Commission (SEC) regulations require us to recognize bitumen reserves for this project. Over the last few years, a combination of wide heavy oil differentials and high natural gas and diluent diluent /dil·u·ent/ (dil´oo-int)
1. causing dilution.

2. an agent that dilutes or renders less potent or irritant.


dil·u·ent
adj.
Serving to dilute.

n.
 costs have resulted in negligible This article or section is written like a personal reflection or and may require .
Please [ improve this article] by rewriting this article or section in an .
 cash margins from insitu bitumen production.

Our oil sands strategy addresses the issues of wide differentials and high natural gas and diluent costs which erode Erode (ĕrōd`), city (1991 urban agglomeration pop. 361,755), Tamil Nadu state, S India, on the Kaveri River. The city is located in a cotton-growing region, and its industries include cotton ginning and the manufacture of transport equipment.  the value of insitu bitumen. Our project integrates field upgrading with bitumen production to produce a high quality premium synthetic crude oil and it virtually eliminates our dependence on natural gas. Canadian reserve standards would allow us to recognize synthetic crude oil reserves Oil reserves refer to portions of oil in place that are claimed to be recoverable under economic constraints.

Oil in the ground is not a "reserve" unless it is claimed to be economically recoverable, since as the oil is extracted, the cost of recovery increases incrementally
 rather than bitumen reserves, as a result of this integrated process. At year-end year-end also year·end
n.
The end of a year.

adj.
Occurring or done at the end of the year: a year-end audit.

Noun 1.
 2005, we could have recognized 200 mmboe of synthetic crude under Canadian reserve standards.

"Our oil sands business is based on the sale of synthetic crude oil, not bitumen," said Fischer. "Long Lake is a terrific project which will earn its cost of capital at WTI oil prices below US$30 per barrel and will generate outstanding returns at current prices."

The base Long Lake project remains on schedule and on budget. Detailed project engineering is substantially complete and approximately 69% of the project's total costs have been committed. Steam injection is expected to commence in late-2006, followed by a ramp-up in bitumen production. The upgrader is scheduled to start operations in the second half of 2007.

To enhance reliability, ensuring bitumen feedstock feed·stock  
n.
Raw material required for an industrial process.

Noun 1. feedstock - the raw material that is required for some industrial process
raw material, staple - material suitable for manufacture or use or finishing
 supply and building capacity for future growth, we are expanding our steam generating facilities to enable us to operate at a steam oil ratio of up to 3.3 compared to the existing design of 2.5. This expansion is expected to cost up to $250 million ($125 million, net to us). In optimizing the value from the project, we will also construct a facility to concentrate soot soot, black or dull brown deposit of fine powder resulting from incomplete combustion of fuel of high carbon content, e.g., coal, wood, and oil. It consists chiefly of amorphous carbon and tarry substances that cause it to adhere to surfaces.  produced by the gasifier and thereby reduce disposal costs. This facility is expected to cost approximately $110 million ($55 million, net to us). These two projects will increase our total capital investment to construct Long Lake by 10% to $1.9 billion.

At peak rates of premium synthetic crude, the first phase of Long Lake should provide us with cash flow of between $400 and $500 million per year, assuming oil prices of US$50/bbl WTI.

"The major remaining uncertainties for this project relate to our ability to access the right labour when we need it, and to achieve labour performance in line with our projections," said Fischer. "To date, labour availability and productivity have been reasonable and we continue to operate within the levels of our contingency contingency n. an event that might not occur.  for the project. Given the advanced state of the project, we believe the risk of major cost overruns Noun 1. cost overrun - excess of cost over budget; "the cost overrun necessitated an additional allocation of funds in the budget"
cost - the total spent for goods or services including money and time and labor
 is significantly reduced."

We are planning to increase synthetic crude oil production to 240,000 bbls/d over the next 10 years (120,000 bbls/d, net to us) in phases of 60,000 bbls/d (30,000 bbls/d, net to us) using the same technology as Long Lake. In 2005, we invested $31 million to further evaluate our existing resource base and acquire additional resource. Phase 2 bitumen production is expected to commence in late-2010, with upgrader commissioning in 2011.

Buzzard

At Buzzard, we invested $439 million and added proved reserves of 17 mmboe. The additions resulted from remapping the reservoir reservoir (rĕz`əvôr, -vwär), storage tank or wholly or partly artificial lake for storing water. Building an embankment or dam to preserve a supply of water for irrigation is an ancient practice; India and Egypt have many old and  size using new seismic data. To date, we have recognized 248 mmboe of proved plus probable reserves for the Buzzard field. We expect to convert probable reserves to proved as we drill development wells and obtain production history. We believe there is potential for additional reserves based on improved recovery factors from this high-quality reservoir.

Buzzard is progressing on schedule and on budget. Development of the facilities is approximately 88% complete. We are currently drilling the production wells and expect to install the utilities and production decks during the second quarter. First oil is expected in late-2006. At its peak, Buzzard is expected to add approximately 85,000 boe/d of net production and generate between $1.6 and $1.7 billion of annual pre-tax cash flow, assuming US$50/bbl WTI.

Syncrude Stage 3 Expansion

At Syncrude, we invested $140 million in 2005 for the Stage 3 expansion and added 17 mmboe of proved reserves. All of these additions were converted from probable reserves. The Stage 3 expansion was approximately 98% complete at the end of 2005, with 65% of the new units completed and operating reliably throughout 2005. Commissioning of all remaining Stage 3 units is underway. The expansion is expected to be completed and on stream by mid-year, adding approximately 8,000 bbls/d of production capacity, net to us.

Coal Bed Methane

In Canada, we are developing the first commercial CBM project in Mannville coals. In 2005, we invested a total of $102 million in exploration and development, of which $33 million was associated with CBM development which added 5 mmboe of proved reserves. Mannville CBM is a new play type in Western Canada
This article is about the region in Canada. For the school in Calgary, see Western Canada High School.


Western Canada, commonly referred to as the West
 with no direct analogies. Without analogies, our ability to recognize proved CBM reserves is limited. To date we have recognized 35 mmboe of CBM probable reserves. We expect our CBM reserves to grow significantly over the coming years as additional wells are drilled, development work progresses and more production history is obtained. Our CBM production is expected to be modest in 2006, but grow substantially in 2007 and beyond as we dewater de·wa·ter  
tr.v. de·wa·tered, de·wa·ter·ing, de·wa·ters
To remove water from (a waste product or streambed, for example).
 the reservoirs and expand our developments. We currently have more than 600 net sections of CBM lands containing an estimated 3 tcf of gas-in-place.

"We are excited about our Mannville CBM opportunities," said Fischer. "Results from our horizontal drilling a drilling machine having a horizontal drill spindle.

See also: Horizontal
 program have exceeded our expectations and we have initiated an aggressive development program to accelerate production. We are targeting to add approximately 150 million cubic feet of daily production by 2011 from these projects, which generate attractive full-cycle rates of return."

Other Projects

We commenced production on Block 51 in Yemen in late-2004 through an early production system. In 2005, we invested $161 million on this block to construct permanent production facilities and further develop the fields. Approximately 17 mmbbl of proved undeveloped reserves were converted to proved producing reserves and 4 mmbbl of additional proved reserves were added through drilling and completion of the permanent production facilities.

In 2005, we recognized approximately 40 mmboe of probable reserves for the Ettrick Places named Ettrick include:
  • Ettrick, New Zealand, in Otago
  • Ettrick, New South Wales
  • Ettrick, Scotland, in the Scottish Borders
  • Ettrick Forest, Royal Forest that covered broad swathes of the Scottish Borders
  • Ettrick, Virginia
 field in the North Sea. We have a 80% working interest and operate the field.

Investment in Exploration

We invested $509 million in exploration in 2005. This resulted in a number of exploration successes, including the potentially significant Knotty Head discovery in the Gulf of Mexico where we have a 25% interest. Approximately $140 million of this capital was invested in land, seismic and other early stage exploration activities. The balance was invested to drill 20 high-impact exploration wells. In addition to Knotty Head, we also had smaller discoveries in the Gulf of Mexico at Big Bend Big Bend

A region of southwest Texas on the Mexican border in a triangle formed by a bend in the Rio Grande. The area includes deep river canyons, desert wilderness, mountains rising to 2,386.
, Anduin In J. R. R. Tolkien's fictional Middle-earth, Anduin is the Sindarin name for the Great River of Wilderland, the longest river in the Third Age (the original Sindarin name means Long River). The ancestors of the Rohirrim called it Langflood.  and Wrigley Wrig·ley   , William, Jr. 1861-1932.

American manufacturer who founded (1891) William Wrigley, Jr., Company, one of the world's largest chewing gum manufacturers.
. In total, we participated in approximately one-third of deep-water discoveries in the Gulf of Mexico in 2005. Offshore West Africa, we drilled two successful appraisal wells in the Usan field on Nigeria's OPL-222.

We added 4 mmboe from exploration in 2005 from our discovery at Wrigley. We anticipate significant additional reserve additions as we delineate the other discoveries and sanction sanction, in law and ethics, any inducement to individuals or groups to follow or refrain from following a particular course of conduct. All societies impose sanctions on their members in order to encourage approved behavior.  commercial development projects.

In the fourth quarter, we announced that Knotty Head, a potential world-class discovery on Green Canyon canyon

Very narrow, deep valley cut by a river through resistant rock and having steep, almost vertical sides. Canyons occur most often in arid or semiarid regions. Some canyons (e.g., the Grand Canyon) are spectacular natural features. See also submarine canyon.
 Block 512, encountered approximately 600 feet of net oil pay in good quality reservoirs. The sidetrack appraisal well, which commenced drilling in late-2005, is nearing completion on the drilling operations. Additional appraisal drilling is planned within the next year to determine the extent of the discovery.

"We believe Knotty Head has the potential to be a significant development in the Green Canyon area," said Fischer. "With continued drilling success, our plan would be to sanction a development project within the next 24 months."

We are proceeding with the development of Wrigley on Mississippi Mississippi, state, United States
Mississippi (mĭs'əsĭp`ē), one of the Deep South states of the United States. It is bordered by Alabama (E), the Gulf of Mexico (S), Arkansas and Louisiana, with most of the border formed by
 Canyon Block 506. We plan to sub-sea tieback tie·back  
n.
1. A decorative loop of fabric, cord, or metal for parting and draping a curtain to the side.

2. tiebacks A pair of curtains intended to be tied back.

Noun 1.
 the well to nearby existing infrastructure with first production expected in the second half of 2006. We have a 50%, non-operated interest in Wrigley. Our Big Bend discovery contains an estimated 15 to 25 bcf of net recoverable resource, with additional potential to be evaluated through subsequent drilling. We plan to complete the well in 2007. We have a 50%, non-operated interest in Big Bend. At our Anduin discovery, we plan to drill an appraisal well in 2006 to determine the resource size and development options. We have a 50% operated interest in Anduin.

Internationally we drilled three small discoveries in the North Sea at Polecat, Yeoman yeoman (yō`mən), class in English society. The term has always been ill-defined, but generally it means a freeholder of a lower status than gentleman who cultivates his own land.  and Black Horse. Their ultimate development is being evaluated and may be dependent on additional exploration success in the area. We have a 40% interest in Polecat, a 50% interest in Yeoman and a 60% interest in Black Horse and operate all three of these wells.

On Nigeria Nigeria (nījĭr`ēə), officially Federal Republic of Nigeria, republic (2006 provisional pop. 140,003,542), 356,667 sq mi (923,768 sq km), W Africa.  OPL-222, offshore West Africa, the Usan-7 and Usan-8 appraisal wells were successfully drilled during 2005. Appraisal of the Usan field is now complete and a preliminary field development plan has been submitted to Nigerian governmental agencies for approval. Preparation for basic engineering and tendering of contracts is proceeding on a multi-well development plan. The current design calls for development that will consist of a purpose-built purpose-built
Adjective

made to serve a specific purpose

Adj. 1. purpose-built - designed and constructed to serve a particular purpose
purpose-made
  FPSO FPSO Floating Production Storage and Off-loading (shipping & oil industry)
FPSO Foster Parent Society of Ontario
FPSO Fleet Publication Supply Office
 capable of handling peak production rates of 160,000 bbl/d of oil with a storage capacity of 2 million barrels. Following government approvals of the final field development plan, the partners expect to formally sanction the project in late-2006. During 2006, the exploration and appraisal program outside of the Usan field will continue on the block. The first well is expected to spud shortly. We have a 20% non-operated interest in this block.

Company-wide, we expect to drill 20 high-impact exploration wells in 2006. We currently have drilling rigs secured for the majority of our 2006 program. We have an extensive inventory of exploration prospects in the Gulf of Mexico. To ensure the continuity of our deep-water drilling program, we have contracted a new-build fifth generation dynamically positioned semi-submersible A semi-submersible or semisubmersible is a watercraft that can put much of its bulk underwater.

With a relatively small area above the water's surface, the semi-submersible is less affected by the waves than a normal ship, but must be trimmed continuously.
 drilling rig, which is scheduled to be completed in 2009. The contract provides us access to the rig for two years.

Investment in Core Asset Development

Our investment in our maturing assets is directed at maximizing max·i·mize  
tr.v. max·i·mized, max·i·miz·ing, max·i·miz·es
1. To increase or make as great as possible:
 the value we extract To decompress. WinZip and other decompression utilities use the term to mean "pulling out" the original files from the compressed archive. See WinZip and data compression. . In 2005, we invested $504 million in our core assets. Approximately $190 million of this investment converted 17 mmboe of proved undeveloped and proved non-producing reserves to proved developed reserves. The remaining $314 million added approximately 31 mmboe of new proved reserves in Canada, Syncrude and our International operations Internal Operations (I.O., IO or I/O) is a fictional American Intelligence Agency in Wildstorm comics. It was originally called International Operations. I.O. first appeared in WildC.A.T.S. volume 1 #1 (August, 1992) and was created by Brandon Choi and Jim Lee. .

Quarterly Dividend

The Board of Directors has declared de·clare  
v. de·clared, de·clar·ing, de·clares

v.tr.
1. To make known formally or officially. See Synonyms at announce.

2. To state emphatically or authoritatively; affirm.

3.
 the regular quarterly dividend of $0.05 per common share payable April 1, 2006, to shareholders of record on March 10, 2006.

Nexen
For information on the South Korean tire manufacturer, see Nexen Tire.



Nexen is an energy company based in Calgary, Alberta. Coordinates:  
 Inc. is an independent, Canadian-based global energy company, listed on the Toronto Toronto (tərŏn`tō), city (1998 est pop. 2,400,000), provincial capital, S Ont., Canada, on Lake Ontario. Toronto is the largest city in Canada and since the 1970s has been one of the fastest-changing cities in North America, experiencing  and New York stock exchanges New York Stock Exchange (NYSE)

World's largest marketplace for securities. The exchange began as an informal meeting of 24 men in 1792 on what is now Wall Street in New York City.
 under the symbol NXY NXY Nexen, Inc. (stock symbol) . We are uniquely positioned for growth in the North Sea, deep-water Gulf of Mexico, the Athabasca oil sands of Alberta, the Middle East and offshore West Africa. We add value for shareholders through successful full-cycle oil and gas exploration and development and leadership in ethics ethics, in philosophy, the study and evaluation of human conduct in the light of moral principles. Moral principles may be viewed either as the standard of conduct that individuals have constructed for themselves or as the body of obligations and duties that a , integrity and environmental protection.

Conference Call

Charlie Fischer, President and CEO (1) (Chief Executive Officer) The highest individual in command of an organization. Typically the president of the company, the CEO reports to the Chairman of the Board. , and Marvin Romanow, Executive Vice-President vice president or vice-pres·i·dent
n. Abbr. VP
1. An officer ranking next below a president, usually empowered to assume the president's duties under conditions such as absence, illness, or death.

2.
 and CFO See Chief Financial Officer. , will host a conference call to discuss our financial and operating results and expectations for the future.
Date:    February 17, 2006
Time:    7 a.m. Mountain Time (9 a.m. Eastern Time)

To listen to the conference call, please call one of the following:

416-641-6111 (Toronto)
866-696-5911 (North American toll-free)
800-9559-6854 (Global toll-free)



A replay of the call will be available for two weeks starting at 11 a.m. Eastern Time, February February: see month.  17 by calling 416-695-5800 (Toronto) or 800-408-3053 (toll-free) passcode 3175900 followed by the pound sign.

A live and on demand webcast of the conference call will be available at www.nexeninc.com.

Forward Looking Statements

Certain statements in this report constitute "forward-looking statements forward-looking statement

A projected financial statement based on management expectations. A forward-looking statement involves risks with regard to the accuracy of assumptions underlying the projections.
" within the meaning of the United States Private Securities Litigation Reform Act The Private Securities Litigation Reform Act of 1995 (PSLRA) implemented several significant substantive changes affecting certain cases brought under the federal securities laws, including changes related to pleading, discovery, liability, class representation and awards fees and  of 1995, Section 21E of the United States Securities Exchange Act of 1934, as amended a·mend  
v. a·mend·ed, a·mend·ing, a·mends

v.tr.
1. To change for the better; improve: amended the earlier proposal so as to make it more comprehensive.

2.
, and Section 27A of the United States Securities Act of 1933, as amended. Such statements are generally identifiable by the terminology The terminology used in the computer and telecommunications field adds tremendous confusion not only for the lay person, but for the technicians themselves. What many do not realize is that terms are made up by anybody and everybody in a nonchalant, casual manner without any regard or  used such as "intend", "plan", "expect", "estimate", "budget", "outlook" or other similar words, and include statements relating to relating to relate prepconcernant

relating to relate prepbezüglich +gen, mit Bezug auf +acc 
 future production associated with our Coal Bed Methane, Long Lake, Syncrude, North Sea and West Africa projects.

The forward-looking statements are subject to known and unknown risks and uncertainties and other factors which may cause actual results, levels of activity and achievements to differ materially from those expressed or implied Inferred from circumstances; known indirectly.

In its legal application, the term implied is used in contrast with express, where the intention regarding the subject matter is explicitly and directly indicated.
 by such statements. Such factors include, among others: market prices for oil and gas and chemicals products; the ability to explore, develop, produce and transport crude oil and natural gas to markets; the results of exploration and development drilling and related activities; foreign-currency exchange rates; economic conditions in the countries and regions where Nexen carries on business; actions by governmental authorities including increases in taxes, changes in environmental and other laws and regulations; renegotiations of contracts; and political uncertainty, including actions by insurgent INSURGENT. One who is concerned in an insurrection. He differs from a rebel in this, that rebel is always understood in a bad sense, or one who unjustly opposes the constituted authorities; insurgent may be one who justly opposes the tyranny of constituted authorities.  or other armed groups or other conflict. The impact of any one factor on a particular forward-looking statement is not determinable Liable to come to an end upon the happening of a certain contingency. Susceptible of being determined, found out, definitely decided upon, or settled.


determinable adj.
 with certainty CERTAINTY, UNCERTAINTY, contracts. In matters of obligation, a thing is certain, when its essence, quality, and quantity, are described, distinctly set forth, Dig. 12, 1, 6. It is uncertain, when the description is not that of one individual object, but designates only the kind. Louis.  as such factors are interdependent in·ter·de·pen·dent  
adj.
Mutually dependent: "Today, the mission of one institution can be accomplished only by recognizing that it lives in an interdependent world with conflicts and overlapping interests" 
 upon other factors, and management's course of action would depend on its assessment of the future considering all information then available. Any statements as to possible commerciality, development plans, capacity expansions, drilling of new wells, ultimate recoverability of reserves, future production rates, cash flows or ability to execute To run a program, which causes the computer to carry out its instructions. See executable code, instruction and EXE file.

execute - execution
 on the disposition of assets or businesses, and changes in any of the foregoing are forward-looking statements.

Although we believe that the expectations conveyed by the forward-looking statements are reasonable based on information available to us on the date such forward-looking statements were made, no assurances can be given as to future results, levels of activity and achievements. Readers should also refer to Items 7 and 7A in our 2004 Annual Report on Form 10-K Form 10-K

A report required by the SEC from exchange-listed companies that provides for annual disclosure of certain financial information.


Form 10-K

See 10-K.
 for further discussion of the risk factors.

Cautionary Note to US Investors - The United States Securities and Exchange Commission (SEC) permits oil and gas companies, in their filings with the SEC, to discuss only proved reserves that are supported by actual production or conclusive Determinative; beyond dispute or question. That which is conclusive is manifest, clear, or obvious. It is a legal inference made so peremptorily that it cannot be overthrown or contradicted.  formation tests to be economically ec·o·nom·i·cal  
adj.
1. Prudent and thrifty in management; not wasteful or extravagant. See Synonyms at sparing.

2. Intended to save money, as by efficient operation or elimination of unnecessary features; economic:
 and legally producible under existing economic and operating conditions. In this press release, we may refer to "recoverable reserves", "probable reserves" and "recoverable resources" which are inherently more uncertain than proved reserves. These terms are not used in our filings with the SEC. Our reserves and related performance measures represent our working interest before royalties, unless otherwise indicated. Please refer to our Annual Report on Form 10-K available from us or the SEC for further reserve disclosure.

In addition, under SEC regulations, the Syncrude oil sands operations are considered mining activities rather than oil and gas activities. Production, reserves and related measures in this release include results from the Company's share of Syncrude.

Cautionary Note to Canadian Investors - Nexen is required to disclose oil and gas activities under National Instrument 51-101-Standards of Disclosure for Oil and Gas Activities (NI 51-101). However, the Canadian securities regulatory authorities Noun 1. regulatory authority - a governmental agency that regulates businesses in the public interest
regulatory agency

administrative body, administrative unit - a unit with administrative responsibilities
  (CSA (1) (Canadian Standards Association, Toronto, Ontario, www.csa.ca) A standards-defining organization founded in 1919. It is involved in many industries, including electronics, communications and information technology. ) have granted us exemptions from certain provisions of NI 51-101 to permit US style disclosure. These exemptions were sought because we are a US Securities and Exchange Commission (SEC) Registrant An individual or organization that signs up (registers) for a training class or service. See domain name registrar.  and our securities regulatory reg·u·late  
tr.v. reg·u·lat·ed, reg·u·lat·ing, reg·u·lates
1. To control or direct according to rule, principle, or law.

2.
 disclosures, including Form 10-K and other related forms, must comply with SEC requirements. Our disclosures may differ from those Canadian companies This is a list of companies from Canada.
  • See also .
  • To make this page easier to read and edit, Defunct Canadian Companies has been placed on a separate page.


Directory: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Current Companies
 who have not received similar exemptions under NI 51-101.

Please read the "Special Note to Canadian Investors" in Item 7A in our 2004 Annual Report on Form 10-K, for a summary of the exemption exemption n. 1) in income taxation, a credit given for each dependent, blindness or other disability, and age over 65, which result in a downward calculation in tax levels.  granted by the CSA and the major differences between SEC requirements and NI 51-101. The summary is not intended to be all-inclusive or to convey convey v. to transfer title (official ownership) to real property (or an interest in real property) from one (grantor) to another (grantee) by a written deed (or an equivalent document such as a judgment of distribution which conveys real property from an estate).  specific advice. Reserve estimation estimation

In mathematics, use of a function or formula to derive a solution or make a prediction. Unlike approximation, it has precise connotations. In statistics, for example, it connotes the careful selection and testing of a function called an estimator.
 is highly technical and requires professional collaboration Working together on a project. See collaborative software.  and judgment. The differences between SEC requirements and NI 51-101 may be material.

Our probable reserves disclosure applies the Society of Petroleum Engineers/World Petroleum Council (SPE/WPC) definition for probable reserves. The Canadian Oil and Gas Evaluation Handbook
For the handbook about Wikipedia, see .

This article is about reference works. For the subnotebook computer, see .
"Pocket reference" redirects here.
 states there should not be a significant difference in estimated probable reserve quantities using the SPE/WPC definition versus NI 51-101.

In this press release, we refer to oil and gas in common units called barrel of oil equivalent The barrel of oil equivalent (bboe, sometimes BOE) is a unit of energy based on the approximate energy released by burning one barrel of crude oil. The US Internal Revenue Service defines it as equal to 5.8 × 106 BTU [1].

5.
 (boe). A boe is derived de·rive  
v. de·rived, de·riv·ing, de·rives

v.tr.
1. To obtain or receive from a source.

2.
 by converting six thousand cubic feet of gas to one barrel of oil (6mcf:1bbl). This conversion may be misleading, particularly if used in isolation, since the 6mcf:1bbl ratio is based on an energy equivalency equivalency

the combining power of an electrolyte. See also equivalent.
 at the burner A drive that writes write-once optical discs such as CD-Rs and DVD-Rs. A "burner" implies a one-time recording, but the term is erroneously used to refer to drives that "write" to re-recordable CD-RW and DVD-RW/+RW media as well. See burn, CD-R and DVD-R.  tip and does not represent the value equivalency at the well head.
Nexen Inc.
Financial Highlights

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
(Cdn$ millions)                    2005      2004     2005      2004
---------------------------------------------------------------------
Net Sales (1)                     1,073       892    4,086     3,251
Cash Flow from Operations (1)       772       592    2,403     1,942
 Per Common Share ($/share)        2.96      2.29     9.23      7.55
Net Income (1)                      300       246    1,152       793
 Per Common Share ($/share)        1.15      0.95     4.43      3.08
Capital Expenditures                731       668    2,691     1,754
Business Acquisitions Net
 of Cash Acquired                     -     2,583        -     2,583
Net Debt (2)                      3,641     4,219    3,641     4,219
Common Shares Outstanding
 (millions of shares)             261.1     258.4    261.1     258.4
                               --------------------------------------
(1) Includes discontinued operations as discussed in Note 15 to our
    Unaudited Consolidated Financial Statements.
(2) Net Debt is defined as long-term debt less working capital.


Cash Flow from Operations (1)

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
(Cdn$ millions)                    2005      2004     2005      2004
---------------------------------------------------------------------
Cash Flow from Operations
Oil & Gas and Syncrude
 Yemen (2)                          236       151      929       581
 Canada (3)                          88       115      397       426
 United States                      164       201      667       700
 United Kingdom                     117        30      284        30
 Other Countries (3)                 10        12       48        57
 Marketing                          186        71      138       100
 Syncrude                            54        38      223       183
                               --------------------------------------
                                    855       618    2,686     2,077
Chemicals                            25        21       95        82
                               --------------------------------------
                                    880       639    2,781     2,159
Interest and Other Corporate
 Items                              (98)      (47)    (335)     (196)
Income Taxes (4)                    (10)        -      (43)      (21)
                               --------------------------------------
Cash Flow from Operations (1)       772       592    2,403     1,942
                               --------------------------------------
                               --------------------------------------

(1) Defined as cash generated from operating activities before
    changes in non-cash working capital and other. We evaluate our
    performance and that of our business segments based on earnings
    and cash flow from operations. Cash flow from operations is a
    non-GAAP term that represents cash generated from operating
    activities before changes in non-cash working capital and other.
    We consider it a key measure as it demonstrates our ability and
    the ability of our business segments to generate the cash flow
    necessary to fund future growth through capital investment and
    repay debt. Cash flow from operations may not be comparable with
    the calculation of similar measures for other companies.

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
(Cdn$ millions)                    2005      2004     2005      2004
---------------------------------------------------------------------
Cash Flow from Operating
 Activities                         468       390    2,143     1,606
Changes in Non-Cash Working
 Capital                            315        23      195       122
Other                                 6       179      133       214
Amortization of Premium for
 Crude Oil Put Options              (17)        -      (68)        -
                               --------------------------------------
Cash Flow from Operations           772       592    2,403     1,942
                               --------------------------------------
                               --------------------------------------

Weighted-average Number of
 Common Shares Outstanding
 (millions of shares)             261.0     258.3    260.4     257.3
                               --------------------------------------
Cash Flow from Operations Per
 Common Share ($/share)            2.96      2.29     9.23      7.55
                               --------------------------------------
                               --------------------------------------

(2) After in-country cash taxes of $74 million for the three months
    ended December 31, 2005 (2004 - $59 million) and $296 million for
    the year ended December 31, 2005 (2004 - $227 million).
(3) Includes discontinued operations as discussed in Note 15 to our
    Unaudited Consolidated Financial Statements.
(4) Excludes in-country cash taxes in Yemen.


Nexen Inc.
Production Volumes (before royalties) (1)

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Crude Oil and NGLs (mbbls/d)
  Yemen                           107.7     105.8    112.7     107.3
  Canada (2)                       21.7      35.5     29.2      36.2
  United States                    18.9      34.4     22.2      30.0
  United Kingdom                   16.2       6.0     12.6       1.5
  Australia (3)                       -       1.8        -       2.7
  Other Countries                   5.4       5.8      5.6       5.3
 Syncrude (4) (mbbls/d)            16.3      16.4     15.5      17.2
                               --------------------------------------
                                  186.2     205.7    197.8     200.2
                               --------------------------------------
Natural Gas (mmcf/d)
  Canada (2)                        102       147      124       146
  United States                      98       147      116       148
  United Kingdom                     33        11       23         3
                               --------------------------------------
                                    233       305      263       297
                               --------------------------------------

Total Production (mboe/d)           225       256      242       250
                               --------------------------------------
                               --------------------------------------


Production Volumes (after royalties)

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Crude Oil and NGLs (mbbls/d)
  Yemen                            59.9      55.1    60.6       53.5
  Canada (2)                       16.8      28.3    22.6       28.2
  United States                    16.7      30.6    19.6       26.5
  United Kingdom                   16.2       6.0    12.6        1.5
  Australia (3)                       -       1.4       -        2.5
  Other Countries                   5.0       5.2     5.1        4.7
 Syncrude 4 (mbbls/d)              16.2      14.6    15.3       16.6
                               --------------------------------------
                                  130.8     141.2   135.8      133.5
                               --------------------------------------
Natural Gas (mmcf/d)
  Canada (2)                         87       117     101        115
  United States                      83       125      99        126
  United Kingdom                     33        11      23          3
                               --------------------------------------
                                    203       253     223        244
                               --------------------------------------

Total Production (mboe/d)           165       183     173        174
                               --------------------------------------
                               --------------------------------------

Notes:
(1) We have presented production volumes before royalties as we
    measure our performance on this basis consistent with other
    Canadian oil and gas companies.
(2) Includes the following production from discontinued operations as
    discussed in Note 15 to our Unaudited Consolidated Financial
    Statements.
                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Before Royalties
 Oil and Liquids (mbbls/d)            -      12.9      6.7      11.7
 Natural Gas (mmcf/d)                 -        45       24        47
After Royalties
 Oil and Liquids (mbbls/d)            -      10.2      5.3       9.0
 Natural Gas (mmcf/d)                 -        31       17        33
                               --------------------------------------
(3) Comprises production from discontinued operations. See Note 15 to
    our Unaudited Consolidated Financial Statements.
(4) Considered a mining operation for US reporting purposes.


Nexen Inc.
Oil and Gas Prices and Cash Netback (1)

                                      Quarters - 2005     Total Year
---------------------------------------------------------------------
(all dollar amounts
 in Cdn$ unless noted)           1st    2nd    3rd    4th       2005
---------------------------------------------------------------------

PRICES:
WTI Crude Oil (US$/bbl)        49.85  53.17  63.52  59.78      56.58
Nexen Average - Oil
 (Cdn$/bbl)                    51.33  55.45  68.99  60.89      58.98
NYMEX Natural Gas
 (US$/mmbtu)                    6.48   6.95   9.69  12.86       8.99
Nexen Average - Gas
 (Cdn$/mcf)                     6.98   7.39   9.68  12.18       8.89
---------------------------------------------------------------------

NETBACKS:
Canada - Light Oil and NGLs
Sales (mbbls/d)                 11.5   12.0    4.7      -        7.1

Price Received ($/bbl)         55.37  58.06  67.04      -      58.55
Royalties & Other              12.08  10.98  14.75      -      12.69
Operating Costs                 9.77   6.29   6.45      -       7.97
---------------------------------------------------------------------
Netback                        33.52  40.79  45.84      -      37.89
---------------------------------------------------------------------
Canada - Heavy Oil
Sales (mbbls/d)                 22.7   22.1   21.2   21.1       21.8

Price Received ($/bbl)         26.15  30.87  47.53  34.41      34.62
Royalties & Other               6.05   8.47  11.80   7.96       8.17
Operating Costs                10.55  10.86  11.42  12.55      10.40
---------------------------------------------------------------------
Netback                         9.55  11.54  24.31  13.90      16.05
---------------------------------------------------------------------
Canada - Total Oil
Sales (mbbls/d)                 34.2   34.1   25.9   21.1       28.9

Price Received ($/bbl)         35.99  40.47  51.05  34.41      40.51
Royalties & Other               8.12   9.39  12.39   7.96       9.28
Operating Costs                10.29   9.25  10.53  12.55       9.80
---------------------------------------------------------------------
Netback                        17.58  21.83  28.13  13.90      21.43
---------------------------------------------------------------------
Canada - Natural Gas
Sales (mmcf/d)                   143    141    111    102        124

Price Received ($/mcf)          5.80   6.30   8.19  10.75       7.51
Royalties & Other               1.17   1.21   1.26   1.63       1.33
Operating Costs                 0.71   0.74   0.80   1.21       1.00
---------------------------------------------------------------------
Netback                         3.92   4.35   6.13   7.91       5.18
---------------------------------------------------------------------
Yemen
Sales (mbbls/d)                115.0  112.6  116.8  108.3      113.2

Price Received ($/bbl)         54.38  58.08  72.04  63.39      62.07
Royalties & Other              27.08  26.30  33.20  28.06      28.71
Operating Costs                 3.33   3.72   3.46   4.03       3.63
In-country Taxes                5.67   6.91   8.61   7.47       7.17
---------------------------------------------------------------------
Netback                        18.30  21.15  26.77  23.83      22.56
---------------------------------------------------------------------
Syncrude
Sales (mbbls/d)                 11.4   16.9   17.2   16.3       15.5

Price Received ($/bbl)         65.15  66.93  78.93  70.79      71.00
Royalties & Other               0.65   0.65   0.78   0.72       0.71
Operating Costs                39.91  20.76  23.22  28.36      26.95
---------------------------------------------------------------------
Netback                        24.59  45.52  54.93  41.71      43.34
---------------------------------------------------------------------

United States
Crude Oil:
 Sales (mbbls/d)                28.5   23.0   18.4   18.9       22.2
 Price Received ($/bbl)        50.90  54.96  68.30  60.32      57.63
Natural Gas:
 Sales (mmcf/d)                  127    120    122     98        116
 Price Received ($/mcf)         8.32   9.01  11.57  13.95      10.56
Total Sales Volume (mboe/d)     49.6   43.0   38.7   35.2       41.6

Price Received ($/boe)         50.48  54.54  68.91  71.14      60.26
Royalties & Other               6.48   7.31   9.60   9.47       8.06
Operating Costs                 4.91   5.70   6.95   8.47       6.35
---------------------------------------------------------------------
Netback                        39.09  41.53  52.36  53.20      45.85
---------------------------------------------------------------------
Australia
Sales (mbbls/d)                    -      -      -      -          -

Price Received ($/bbl)             -      -      -      -          -
Royalties & Other                  -      -      -      -          -
Operating Costs                    -      -      -      -          -
---------------------------------------------------------------------
Netback                            -      -      -      -          -
---------------------------------------------------------------------
United Kingdom
Crude Oil:
 Sales (mbbls/d)                17.5   11.7   10.4   15.6       13.8
 Price Received ($/bbl)        54.53  59.02  65.87  64.75      60.55
Natural Gas:
 Sales (mmcf/d)                   26     15     13     30         21
 Price Received ($/mcf)         6.92   5.45   4.84  11.26       7.86
Total Sales Volume (mboe/d)     21.9   14.3   12.6   20.6       17.3

Price Received ($/boe)         51.92  54.31  59.39  65.42      57.83
Royalties & Other                  -      -      -      -          -
Operating Costs                12.59  21.69  19.30   9.95      14.90
---------------------------------------------------------------------
Netback                        39.33  32.62  40.09  55.47      42.93
---------------------------------------------------------------------
Other Countries
Sales (mbbls/d)                  5.6    6.2    5.3    6.3        5.9

Price Received ($/bbl)         46.63  53.70  65.82  72.75      59.96
Royalties & Other               3.68   6.01   5.07   5.96       5.23
Operating Costs                 2.32   9.27   3.20   7.03       5.55
---------------------------------------------------------------------
Netback                        40.63  38.42  57.55  59.76      49.18
---------------------------------------------------------------------
Company-Wide
Oil and Gas Sales (mboe/d)     261.6  250.4  235.2  225.2      243.0

Price Received ($/boe)         49.55  53.45  67.09  62.97      57.97
Royalties & Other              14.94  15.22  20.21  16.66      16.70
Operating Costs                 6.94   7.18   7.21   8.18       7.36
In-country Taxes                2.49   3.10   4.28   3.59       3.34
---------------------------------------------------------------------
Netback                        25.18  27.95  35.39  34.54      30.57
---------------------------------------------------------------------


                                       Quarters - 2004    Total Year
---------------------------------------------------------------------
(all dollar amounts
 in Cdn$ unless noted)           1st    2nd    3rd    4th       2004
---------------------------------------------------------------------
PRICES:
WTI Crude Oil (US$/bbl)        35.15  38.32  43.88  48.28      41.40
Nexen Average - Oil
 (Cdn$/bbl)                    40.22  44.75  50.98  47.98      45.90
NYMEX Natural Gas
 (US$/mmbtu)                    5.73   6.16   5.56   7.30       6.19
Nexen Average - Gas
 (Cdn$/mcf)                     6.63   7.17   6.55   7.02       6.85
---------------------------------------------------------------------

NETBACKS:
Canada - Light Oil and NGLs
Sales (mbbls/d)                 12.4   13.6   12.0   11.5       12.4

Price Received ($/bbl)         41.31  46.37  51.82  51.47      47.64
Royalties & Other               9.41  10.60  12.30  10.10      10.60
Operating Costs                 9.09   6.52   6.22   6.27       7.03
---------------------------------------------------------------------
Netback                        22.81  29.25  33.30  35.10      30.01
---------------------------------------------------------------------
Canada - Heavy Oil
Sales (mbbls/d)                 23.7   22.9   23.0   23.4       23.2

Price Received ($/bbl)         27.92  30.12  36.75  28.15      30.71
Royalties & Other               6.00   6.73   8.77   5.65       6.78
Operating Costs                 9.98  10.44  10.05  10.70      10.29
---------------------------------------------------------------------
Netback                        11.94  12.95  17.93  11.80      13.64
---------------------------------------------------------------------
Canada - Total Oil
Sales (mbbls/d)                 36.1   36.5   35.0   34.9       35.6

Price Received ($/bbl)         32.51  36.18  41.94  35.83      36.60
Royalties & Other               7.21   8.19  10.03   7.02       8.11
Operating Costs                 9.68   8.98   8.73   9.24       9.16
---------------------------------------------------------------------
Netback                        15.62  19.01  23.18  19.57      19.33
---------------------------------------------------------------------
Canada - Natural Gas
Sales (mmcf/d)                   149    145    141    147        146

Price Received ($/mcf)          5.59   5.97   5.43   6.02       5.76
Royalties & Other               1.10   1.11   1.04   0.95       1.06
Operating Costs                 0.59   0.69   0.83   0.65       0.69
---------------------------------------------------------------------
Netback                         3.90   4.17   3.56   4.42       4.01
---------------------------------------------------------------------
Yemen
Sales (mbbls/d)                115.3  105.6  101.5  104.0      106.6

Price Received ($/bbl)         41.88  45.88  53.80  49.52      47.59
Royalties & Other              22.10  22.53  27.40  24.15      23.98
Operating Costs                 2.72   2.55   2.91   3.04       2.80
In-country Taxes                4.41   5.88   6.97   6.17       5.82
---------------------------------------------------------------------
Netback                        12.65  14.92  16.52  16.16      14.99
---------------------------------------------------------------------
Syncrude
Sales (mbbls/d)                 18.3   16.6   17.6   16.4       17.2

Price Received ($/bbl)         45.54  52.46  55.58  58.16      52.80
Royalties & Other               0.45   0.52   0.55   6.08       1.84
Operating Costs                17.41  20.01  18.87  23.58      19.89
---------------------------------------------------------------------
Netback                        27.68  31.93  36.16  28.50      31.07
---------------------------------------------------------------------

United States
Crude Oil:
 Sales (mbbls/d)                26.5   25.7   32.9   34.4       30.0
 Price Received ($/bbl)        38.99  46.31  49.90  49.44      46.60
Natural Gas:
 Sales (mmcf/d)                  167    134    144    147        148
 Price Received ($/mcf)         7.63   8.47   7.64   7.93       7.89
Total Sales Volume (mboe/d)     54.4   48.0   56.9   58.8       54.5

Price Received ($/boe)         42.47  48.38  48.19  48.67      46.94
Royalties & Other               5.90   6.98   6.22   6.16       6.29
Operating Costs                 4.13   4.84   7.60   4.52       5.30
---------------------------------------------------------------------
Netback                        32.44  36.56  34.37  37.99      35.35
---------------------------------------------------------------------
Australia
Sales (mbbls/d)                  7.5    4.8      -    5.1        4.3

Price Received ($/bbl)         42.60  49.84      -  63.78      51.22
Royalties & Other               2.11   2.28      -   7.42       4.00
Operating Costs                22.88  34.28      -  46.38      32.94
---------------------------------------------------------------------
Netback                        17.61  13.28      -   9.98      14.28
---------------------------------------------------------------------
United Kingdom
Crude Oil:
 Sales (mbbls/d)                   -      -      -    6.3        1.6
 Price Received ($/bbl)            -      -      -  46.81      46.81
Natural Gas:
 Sales (mmcf/d)                    -      -      -     11          3
 Price Received ($/mcf)            -      -      -   8.28       8.28
Total Sales Volume (mboe/d)        -      -      -    8.1        2.1

Price Received ($/boe)             -      -      -  47.45      47.45
Royalties & Other                  -      -      -      -          -
Operating Costs                    -      -      -   8.26       8.26
---------------------------------------------------------------------
Netback                            -      -      -  39.19      39.19
---------------------------------------------------------------------
Other Countries
Sales (mbbls/d)                  4.1    5.8    5.0    5.4        5.1

Price Received ($/bbl)         37.07  44.75  46.22  42.95      43.07
Royalties & Other               1.73   4.94   3.46   3.33       3.49
Operating Costs                 2.70   6.28   2.93   2.65       3.76
---------------------------------------------------------------------
Netback                        32.64  33.53  39.83  36.97      35.82
---------------------------------------------------------------------
Company-Wide
Oil and Gas Sales (mboe/d)     260.5  241.5  239.5  257.2      249.7

Price Received ($/boe)         40.11  44.41  48.66  46.82      44.94
Royalties & Other              12.76  13.34  15.30  13.29      13.65
Operating Costs                 5.67   6.06   6.25   6.63       6.15
In-country Taxes                1.95   2.57   2.96   2.49       2.48
---------------------------------------------------------------------
Netback                        19.73  22.44  24.15  24.41      22.66
---------------------------------------------------------------------

(1) Defined as average sales price less royalties and other,
    operating costs, and in-country taxes in Yemen.


Nexen Inc.
Unaudited Consolidated Statement of Income
For the Three and Twelve Months Ended December 31
Cdn$ millions, except per share amounts

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------

Revenues
 Net Sales                        1,073       805    3,932     2,944
 Marketing and Other (Note 14)      372       286      702       713
 Gain on Dilution of
  Interest in Chemicals
  Business (Note 2)                   -         -      193         -
                                 ------------------------------------
                                  1,445     1,091    4,827     3,657
                                 ------------------------------------
Expenses
 Operating                          243       188      893       722
 Depreciation, Depletion,
  Amortization and Impairment       304       194    1,052       674
 Transportation and Other           226       161      796       549
 General and Administrative         145        52      792       299
 Exploration                         86       136      250       243
 Interest (Note 7)                   13        25       97       143
                                 ------------------------------------
                                  1,017       756    3,880     2,630
                                 ------------------------------------

Income from Continuing
 Operations before Income
 Taxes                              428       335      947     1,027
                                 ------------------------------------

Provision for Income Taxes
 Current                             84        59      339       248
 Future                              41        50     (100)       69
                                 ------------------------------------
                                    125       109      239       317
                                 ------------------------------------

Net Income from Continuing
 Operations before
 Non-Controlling Interests          303       226      708       710

Net Income Attributable to
 Non-Controlling Interests            3         -        8         -
                                 ------------------------------------

Net Income from Continuing
 Operations                         300       226      700       710
 Net Income from Discontinued
  Operations (Note 15)                -        20      452        83
                                 ------------------------------------

Net Income                          300       246    1,152       793
                                 ------------------------------------
                                 ------------------------------------

Earnings Per Common Share
 from Continuing Operations
 ($/share)
 Basic (Note 12)                   1.15      0.87     2.69      2.76
                                 ------------------------------------
                                 ------------------------------------

 Diluted (Note 12)                 1.12      0.86     2.63      2.72
                                 ------------------------------------
                                 ------------------------------------

Earnings Per Common Share
 ($/share)
 Basic (Note 12)                   1.15      0.95     4.43      3.08
                                 ------------------------------------
                                 ------------------------------------

 Diluted (Note 12)                 1.12      0.94     4.33      3.04
                                 ------------------------------------
                                 ------------------------------------

See accompanying notes to the Unaudited Consolidated Financial
Statements.


Nexen Inc.
Unaudited Consolidated Balance Sheet
Cdn$ millions, except share amounts

                                      December 31        December 31
                                             2005               2004
---------------------------------------------------------------------
Assets
 Current Assets
  Cash and Cash Equivalents                    48                 73
  Restricted Cash                              70                  -
  Accounts Receivable (Note 3)              3,151              2,100
  Inventories and Supplies (Note 4)           504                351
  Assets of Discontinued Operations
   (Note 15)                                    -                 38
  Other                                        51                 41
                                      -------------------------------
   Total Current Assets                     3,824              2,603
                                      -------------------------------

 Property, Plant and Equipment (Note 6)
  Net of Accumulated Depreciation,
   Depletion, Amortization and Impairment
   of $5,468 (December 31, 2004 - $4,924)   9,594              8,203
 Goodwill                                     364                375
 Future Income Tax Assets                     410                333
 Deferred Charges and Other Assets
  (Note 5)                                    398                429
 Assets of Discontinued Operations
  (Note 15)                                      -               440
                                      -------------------------------

                                           14,590             12,383
                                      -------------------------------
                                      -------------------------------
Liabilities and Shareholders' Equity
 Current Liabilities
  Short-Term Borrowings (Note 7)                -                100
  Accounts Payable and Accrued
   Liabilities                              3,710              2,377
  Accrued Interest Payable                     55                 34
  Dividends Payable                            13                 13
  Liabilities of Discontinued
   Operations (Note 15)                         -                 39
                                      -------------------------------
   Total Current Liabilities                3,778              2,563
                                      -------------------------------

 Long-Term Debt (Note 7)                    3,687              4,259
 Future Income Tax Liabilities              1,960              2,023
 Asset Retirement Obligations (Note 8)        590                399
 Deferred Credits and Other
  Liabilities (Note 9)                        479                142
 Liabilities of Discontinued
  Operations (Note 15)                          -                130
 Non-Controlling Interests (Note 2)            88                  -
 Shareholders' Equity (Note 11)
  Common Shares, no par value
   Authorized: Unlimited
   Outstanding: 2005 - 261,140,571 shares
                2004 - 258,399,166 shares     732                637
  Contributed Surplus                           2                  -
  Retained Earnings                         3,435              2,335
  Cumulative Foreign Currency
   Translation Adjustment                    (161)              (105)
                                      -------------------------------
   Total Shareholders' Equity               4,008              2,867
                                      -------------------------------

Commitments, Contingencies and
 Guarantees (Note 16)
                                           14,590             12,383
                                      -------------------------------
                                      -------------------------------

See accompanying notes to the Unaudited Consolidated Financial
Statements.


Nexen Inc.
Unaudited Consolidated Statement of Cash Flows
For the Three and Twelve Months Ended December 31
Cdn$ millions

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------

Operating Activities
 Net Income from
  Continuing Operations             300       226      700       710
 Net Income from Discontinued
  Operations                          -        20      452        83
 Charges and Credits to Income
  not Involving Cash (Note 13)      403       210    1,069       906
 Exploration Expense                 86       136      250       243
 Changes in Non-Cash Working
  Capital (Note 13)                (315)      (23)    (195)     (122)
 Other                               (6)     (179)    (133)     (214)
                                 ------------------------------------
                                    468       390    2,143     1,606

Financing Activities
 Proceeds from (Repayment of)
  Term Credit Facilities, Net         1        83      (66)       83
 Proceeds from Long-Term
  Debt (Note 7)                       -     1,779    1,253     1,779
 Repayment of Long-Term
  Debt (Note 7)                       -         -   (1,818)     (300)
 Proceeds from (Repayment of)
  Short-Term Borrowings, Net          -       101      (99)      101
 Redemption of Preferred
  Securities                          -         -        -      (289)
 Dividends on Common Shares         (13)      (13)     (52)      (52)
 Issue of Common Shares               7         8       58       124
 Net Proceeds from Canexus
  Initial Public Offering
  (Note 2)                            -         -      301         -
 Proceeds from Term Credit
  Facilities of Canexus,
  Net (Notes 2 and 7)                 3         -      176         -
 Other                                8       (20)     (27)      (20)
                                 ------------------------------------
                                      6     1,938     (274)    1,426

Investing Activities
 Business Acquisition,
  Net of Cash Acquired                -    (2,583)       -    (2,583)
 Capital Expenditures
  Exploration and Development      (694)     (619)  (2,564)   (1,582)
  Proved Property Acquisitions        -        (4)     (20)       (4)
  Chemicals, Corporate and Other    (21)      (26)     (54)      (95)
 Proceeds on Disposition of Assets    -        24      911        34
 Changes in Non-Cash Working
  Capital (Note 13)                   -       137      (54)      244
 Changes in Restricted Cash         140         -      (70)        -
 Other                              (20)       (7)     (13)      (27)
                                 ------------------------------------
                                   (595)   (3,078)  (1,864)   (4,013)

Effect of Exchange Rate Changes
 on Cash and Cash Equivalents       (31)      (43)     (30)      (33)
                                 ------------------------------------

Decrease in Cash and Cash
 Equivalents                       (152)     (793)     (25)   (1,014)

Cash and Cash Equivalents -
 Beginning of Period                200       866       73     1,087
                                 ------------------------------------

Cash and Cash Equivalents -
 End of Period                       48        73       48        73
                                 ------------------------------------
                                 ------------------------------------

See accompanying notes to the Unaudited Consolidated Financial
Statements.


Nexen Inc.
Unaudited Consolidated Statement of Shareholders' Equity
For the Twelve Months Ended December 31, 2005 and December 31, 2004
Cdn$ millions

                                             2005               2004
---------------------------------------------------------------------

Common Shares
 Balance at Beginning of Year                 637                513
 Exercise of Stock Options                     29                 93
 Issue of Common Shares                        29                 31
 Previously Recognized Liability
  Relating to Stock Options Exercised          37                  -
                                      -------------------------------
 Balance at End of Year                       732                637
                                      -------------------------------
                                      -------------------------------

Contributed Surplus
 Balance at Beginning of Year                   -                  1
 Stock Based Compensation Expense               2                  2
 Modification of Stock Option
  Plan to Tandem Option Plan                    -                 (3)
                                      -------------------------------
 Balance at End of Year                         2                  -
                                      -------------------------------
                                      -------------------------------

Retained Earnings
 Balance at Beginning of Year               2,335              1,594
 Net Income                                 1,152                793
 Dividends on Common Shares                   (52)               (52)
                                      -------------------------------
 Balance at End of Year                     3,435              2,335
                                      -------------------------------
                                      -------------------------------

Cumulative Foreign Currency
 Translation Adjustment
 Balance at Beginning of Year                (105)               (33)
 Translation Adjustment,
  Net of Income Taxes                         (56)               (72)
                                      -------------------------------
 Balance at End of Year                      (161)              (105)
                                      -------------------------------
                                      -------------------------------

See accompanying notes to the Unaudited Consolidated Financial
Statements.


Nexen Inc.
Notes to Unaudited Consolidated Financial Statements
Cdn$ millions except as noted



1. ACCOUNTING POLICIES

The Unaudited Consolidated Financial Statements Consolidated Financial Statements

The combined financial statements of a parent company and its subsidiaries.

Notes:
Because consolidated financial statements present an aggregated look at the financial position of a parent and its subsidiaries, they enable you to gauge
 are prepared in accordance Accordance is Bible Study Software for Macintosh developed by OakTree Software, Inc.[]

As well as a standalone program, it is the base software packaged by Zondervan in their Bible Study suites for Macintosh.
 with Canadian Generally Accepted Accounting Principles The standard accounting rules, regulations, and procedures used by companies in maintaining their financial records.

Generally accepted accounting principles (GAAP) provide companies and accountants with a consistent set of guidelines that cover both broad accounting
 (GAAP GAAP

See: Generally Accepted Accounting Principles


GAAP

See generally accepted accounting principles (GAAP).
). The consolidated financial statements include the assets and liabilities of Canexus (see Note 2) with an adjustment made for non-controlling interests. In the opinion of management, the Unaudited Consolidated Financial Statements contain all adjustments of a normal and recurring re·cur  
intr.v. re·curred, re·cur·ring, re·curs
1. To happen, come up, or show up again or repeatedly.

2. To return to one's attention or memory.

3. To return in thought or discourse.
 nature necessary to present fairly Nexen Inc.'s (Nexen, we or our) financial position at December 31, 2005 and the results of our operations and our cash flows for the three and twelve months ended December 31, 2005 and 2004.

Management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets Contingent Asset

An asset in which the possibility of ownership depends solely upon future events uncontrollable by the company.

Notes:
An example might be a settlement from a lawsuit.
See also: Asset, Balance Sheet, Contingent Liability, Liability
 and liabilities at the date of the Unaudited Consolidated Financial Statements, and revenues and expenses during the reporting period. Our management reviews these estimates, including those related to accruals Accruals

Accounts on a balance sheet that represent liabilities and non-cash-based assets used in accrual-based accounting. These accounts include, among many others, accounts payable, accounts receivable, goodwill, future tax liability and future interest expense.
, litigation An action brought in court to enforce a particular right. The act or process of bringing a lawsuit in and of itself; a judicial contest; any dispute.

When a person begins a civil lawsuit, the person enters into a process called litigation.
, asset retirement obligations Asset Retirement Obligations provide for future disposal of assets as required by SFAS 143 [1].

Firms must recognize the ARO liability in the period it was acquired, generally acquisition.
, income taxes and determination of proved reserves, on an ongoing basis. Changes in facts and circumstances CIRCUMSTANCES, evidence. The particulars which accompany a fact.
     2. The facts proved are either possible or impossible, ordinary and probable, or extraordinary and improbable, recent or ancient; they may have happened near us, or afar off; they are public or
 may result in revised estimates Revised estimate

The third estimate of GDP released about three months after the measurement period.
 and actual results may differ from these estimates.

These Unaudited Consolidated Financial Statements do not conform in all respects with the requirements for annual financial statements and therefore should be read in conjunction conjunction, in astronomy
conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun.
 with our Audited Consolidated Financial Statements included in our 2004 Annual Report on Form 10-K. The accounting policies we follow are described in Note 1 of the Audited Consolidated Financial Statements included in our 2004 Annual Report on Form 10-K.

Changes in Accounting Principles

Financial Instruments

In the fourth quarter of 2004, we retroactively ret·ro·ac·tive  
adj.
Influencing or applying to a period prior to enactment: a retroactive pay increase.



[French rétroactif, from Latin
 adopted the changes to Canadian Institute of Chartered Accountants The Canadian Institute of Chartered Accountants (CICA) is the umbrella body for the Chartered Accountant profession in Canada and Bermuda. Membership of the CICA totals 70,000 Chartered Accountants and 8,500 students.  (CICA CICA Competition In Contracting Act of 1984 (USA)
CICA Canadian Institute of Chartered Accountants
CICA Competition In Contracting Act
CICA Criminal Injuries Compensation Authority (UK) 
) standard S.3860, Financial Instruments. These changes require that fixed-amount contractual obligations that can be settled by issuing a variable number of equity instruments be classified as a liability. Our US-dollar denominated preferred and subordinated Subordinated

A claim ranked lower in priority than other claims. Common stock claims are always subordinated to debt.
 securities have these characteristics and accordingly have been reclassified as long-term debt Long-Term Debt

Loans and financial obligations lasting over one year.

Notes:
For example debts obligations such as bonds and notes which have maturities greater than one year would be considered long-term debt.
. Dividends and interest on these securities have been included in interest expense and issue costs previously charged to retained earnings Retained Earnings

The percentage of net earnings not paid out in dividends, but retained by the company to be reinvested in its core business or to pay debt. It is recorded under shareholders equity on the balance sheet.
 have been amortized over the life of the securities. Unamortized issue costs have been expensed on the redemption The liberation of an estate in real property from a mortgage.

Redemption is the process by which land that has been mortgaged or pledged is bought back or reclaimed. It is accomplished through a payment of the debt owed or a fulfillment of the other conditions.
 of the preferred securities in 2004. Foreign exchange gains or losses from translation of the US-dollar denominated preferred and subordinated securities have been included as cumulative foreign currency translation adjustments. The change was adopted retroactively and all prior periods presented have been restated. This change in accounting principle has no effect on our Unaudited Consolidated Financial Statements for the three and twelve months ended December 31, 2005.

Generally Accepted Accounting Principles

In 2004, we adopted CICA standard S.1100, Generally Accepted Accounting Principles which eliminated general industry practice in Canada as a component of GAAP. Our accounting policy is to include geological ge·ol·o·gy  
n. pl. ge·ol·o·gies
1. The scientific study of the origin, history, and structure of the earth.

2. The structure of a specific region of the earth's crust.

3. A book on geology.
 and geophysical ge·o·phys·ics  
n. (used with a sing. verb)
The physics of the earth and its environment, including the physics of fields such as meteorology, oceanography, and seismology.
 costs as operating cash outflows in our Unaudited Consolidated con·sol·i·date  
v. con·sol·i·dat·ed, con·sol·i·dat·ing, con·sol·i·dates

v.tr.
1. To unite into one system or whole; combine:
 Statement of Cash Flows. For previous years, we included geological and geophysical costs as investing cash outflows consistent with industry practice in Canada. In our Unaudited Consolidated Statement of Cash Flows for the three months ended December 31, 2005, we included $16 million (2004 - $19 million) and for the twelve months ended December 31, 2005, we included $53 million (2004 - $73 million) of geological and geophysical costs as other operating cash outflows. This change in accounting policy was adopted prospectively.

Reclassification Reclassification

The process of changing the class of mutual funds once certain requirements have been met. These requirements are generally placed on load mutual funds. Reclassification is not considered to be a taxable event.


Certain comparative figures have been reclassified to ensure consistency Consistency can refer to:
  • Consistency proof, in mathematics, logic, and theoretical physics
  • Consistency (statistics), a property of estimators and estimation
 with current period presentation.

2. CANEXUS INCOME FUND

In June June: see month.  2005, our board of directors approved a plan to monetize Monetize

1. To convert into money.

2. To convert from securities into currency that can be used to purchase goods and services.

Notes:
For example, you'll often hear Internet marketers talk about "monetizing website visitors.
 our chemicals operations through the creation of an income trust and the issuance of trust units in an initial public offering. This initial public offering closed on August 18, 2005 with Canexus Income Fund (Canexus) issuing 30 million units at a price of $10 per unit for gross proceeds of $300 million ($284 million, net of underwriters' commissions).

Concurrent At the same time. It implies that multiple processes are taking place simultaneously. See concurrent operation.  with the closing of the offering, Canexus acquired a 36.5% interest in Canexus Limited Partnership (Canexus LP) using the net proceeds Net Proceeds

The amount received after all costs are deducted from the sale of a piece of property or security.

Notes:
In the case of an investor selling a security, net proceeds represent the proceeds from the sale minus any trading costs (i.e. commissions).
 from the initial public offering. Canexus LP acquired Nexen's chemicals business for approximately $1 billion, comprised of the net proceeds from Canexus' initial public offering and $200 million (US$167 million) of bank debt, plus the issuance of 52.3 million exchangeable limited partnership units (Exchangeable LP Units) of Canexus LP. At that time, the Exchangeable LP Units held by Nexen represented a 63.5% interest in Canexus LP.

The Exchangeable LP Units held by Nexen are exchangeable on a one for one basis for trust units of Canexus. As a result, the Exchangeable LP Units owned by Nexen were exchangeable into 52.3 million trust units which represented 63.5% of the outstanding trust units of Canexus assuming exchange of the Exchangeable LP Units.

On September September: see month.  16, 2005, the underwriters of the initial public offering exercised a portion of their over-allotment option to purchase 1.75 million trust units at $10 per unit for gross proceeds of $18 million ($17 million, net of underwriters' commissions). As a result, Nexen exchanged 1.75 million of its Exchangeable LP Units for $17 million in net proceeds. After this exchange, Nexen has a 61.4% interest in Canexus LP represented by 50.5 million Exchangeable LP Units. The initial public offering, together with the exercise of the over-allotment, resulted in total net proceeds to Nexen of $301 million.

These transactions diluted di·lute  
tr.v. di·lut·ed, di·lut·ing, di·lutes
1. To make thinner or less concentrated by adding a liquid such as water.

2. To lessen the force, strength, purity, or brilliance of, especially by admixture.
 our interest in our chemicals operations. As a result of this dilution Dilution

A reduction in earnings per share of common stock that occurs through the issuance of additional shares or the conversion of convertible securities.

Notes:
Adding to the number of shares outstanding reduces the value of holdings of existing shareholders.
, we recorded a gain of $193 million during the third quarter.

We have the right to nominate nom·i·nate  
tr.v. nom·i·nat·ed, nom·i·nat·ing, nom·i·nates
1. To propose by name as a candidate, especially for election.

2. To designate or appoint to an office, responsibility, or honor.
 a majority of the members of the board of Canexus Limited, the corporation with responsibility for the strategic management and operational decisions of Canexus and Canexus LP. Nexen has currently nominated nom·i·nate  
tr.v. nom·i·nat·ed, nom·i·nat·ing, nom·i·nates
1. To propose by name as a candidate, especially for election.

2. To designate or appoint to an office, responsibility, or honor.
 two representatives to the ten-member board of Canexus Limited. Since we have retained effective control of our chemicals business, the results, assets and liabilities of this business have been included in these financial statements. The non-Nexen ownership interests in our chemicals business are shown as non-controlling interests.
3. ACCOUNTS RECEIVABLE
                                        December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Trade
 Marketing                                    2,400            1,452
 Oil and Gas                                    614              557
 Chemicals and Other                             48               57
                                        -----------------------------
                                              3,062            2,066
Non-Trade                                        96               49
                                        -----------------------------
                                              3,158            2,115
Allowance for Doubtful Accounts                  (7)             (15)
                                        -----------------------------
Total                                         3,151            2,100
                                        -----------------------------
                                        -----------------------------


4. INVENTORIES AND SUPPLIES
                                        December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Finished Products
 Marketing                                      320              199
 Oil and Gas                                     11                6
 Chemicals and Other                             15               13
                                        -----------------------------
                                                346              218
Work in Process                                   6                4
Field Supplies                                  152              129
                                        -----------------------------
Total                                           504              351
                                        -----------------------------
                                        -----------------------------


5. DEFERRED CHARGES AND OTHER ASSETS
                                        December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Long-Term Marketing Derivative
 Contracts (Note 10)                            232               91
Deferred Financing Costs                         63               67
Asset Retirement Remediation Fund (Note 8)       14                -
Crude Oil Put Options                             4              200
Defined Benefit Pension Plan Asset                -               13
Other                                            85               58
                                        -----------------------------
Total                                           398              429
                                        -----------------------------
                                        -----------------------------



6. SUSPENDED sus·pend  
v. sus·pend·ed, sus·pend·ing, sus·pends

v.tr.
1. To bar for a period from a privilege, office, or position, usually as a punishment: suspend a student from school.
 WELL COSTS

In the third quarter of 2005, we adopted staff position 19-1 (FSP FSP - File Service Protocol  19-1) issued by the Financial Accounting Standards Board Financial Accounting Standards Board (FASB)

Board composed of independent members who create and interpret Generally Accepted Accounting Principles (GAAP).
 (FASB FASB

See: Financial Accounting Standards Board


FASB

See Financial Accounting Standards Board (FASB).
) on accounting for suspended well costs. FSP 19-1 amends AMENDS. A satisfaction, given by a wrong doer to the party injured for a wrong committed. 1 Lilly's Reg. 81.
     2. By statute 24 Geo. II. c. 44, in England, and by similar statutes in some of the United States, justices of the peace, upon being notified of an
 FASB Statement FASB Statement

A standard set by the Financial Accounting Standards Board regarding a financial accounting and reporting method. Essentially, FASB statements determine the acceptable accounting practices that Certified Public Accountants use in reporting
  No. 19, Financial Accounting and Reporting by Oil and Gas Producing Companies, for companies using the successful efforts method of accounting which required that capitalized Capitalized

Recorded in asset accounts and then depreciated or amortized, as is appropriate for expenditures for items with useful lives longer than one year.
 exploratory well costs be expensed if related reserves could not be classified as proved within one year. FSP 19-1 provides that exploratory well costs should continue to be capitalized when a well has found a sufficient quantity of reserves to justify its completion as a producing well and sufficient progress is being made to assess the reserves and the economic and operating viability of the well. FSP 19-1 also requires certain disclosures with respect to capitalized exploratory well costs.

The following table sets out the changes in capitalized exploratory well costs during the twelve months ended December 31, 2005 and 2004, and does not include amounts that were initially capitalized and subsequently expensed in the same period.
Twelve Months
                                                   Ended December 31
                                                      2005      2004
---------------------------------------------------------------------
Balance at Beginning of Year                           116        89
Additions to Capitalized Exploratory Well Costs
 Pending the Determination of Proved Reserves          174        51
Capitalized Exploratory Well Costs Charged to Expense  (27)      (19)
Reclasses to Wells, Facilities and Equipment Based
 on Determination of Proved Reserves                    (3)        -
Effects of Foreign Exchange                             (8)       (5)
                                        -----------------------------
Balance at End of Year                                 252       116
                                        -----------------------------
                                        -----------------------------



The following table provides an aging of capitalized exploratory well costs based on the date drilling was completed and shows the number of projects for which exploratory well costs have been capitalized for a period greater than one year since the completion of drilling.
December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Capitalized for a Period of
 One Year or Less                               165               53
Capitalized for a Period of Greater
 than One Year                                   87               63
                                        -----------------------------
Balance at End of Year                          252              116
                                        -----------------------------
                                        -----------------------------

Number of Projects that have Exploratory
 Well Costs Capitalized for a Period
 Greater than One Year                            3                2
                                        -----------------------------



As at December 31, 2005, we have exploratory costs that have been capitalized for more than one year relating to our interest in an exploratory block, offshore Nigeria ($74 million), our interest in exploratory blocks in the Gulf of Mexico ($4 million) and coal bed methane exploratory activities in Canada ($9 million). Exploratory costs offshore Nigeria were first capitalized in 1998 and we have subsequently drilled a further seven successful wells on the block. The joint venture partners have finalized See finalization.  pre-development design studies and have submitted a field development plan for government approval. Drilling activity has resumed and an appraisal and exploration program is currently in progress. Once final regulatory approvals have been received and the project has been sanctioned, we will book proved reserves. We have capitalized costs related to successful wells drilled in 2004 and 2005 in the Gulf of Mexico, and in Canada we have capitalized exploratory costs relating to our coal bed methane projects. We are currently assessing all of these wells and projects and we are working with our partners to prepare development plans.
7. LONG-TERM DEBT AND SHORT-TERM BORROWINGS

                                        December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Acquisition Credit Facilities (a)                 -            1,806
Canexus LP Term Credit Facilities
 (US$147 million drawn) (b)                     171                -
Term Credit Facilities (c)                        -               87
Debentures, due 2006 (1)                         93               93
Medium-Term Notes, due 2007                     150              150
Medium-Term Notes, due 2008                     125              125
Notes, due 2013 (US$500 million)                583              602
Notes, due 2015 (US$250 million) (d)            292                -
Notes, due 2028 (US$200 million)                233              241
Notes, due 2032 (US$500 million)                583              602
Notes, due 2035 (US$790 million) (e)            921                -
Subordinated Debentures, due 2043
 (US$460 million)                               536              553
                                        -----------------------------
                                              3,687            4,259
                                        -----------------------------
                                        -----------------------------

Note:
(1) Includes $50 million of principal that was effectively converted
    through a currency exchange contract to US$37 million. Amounts
    due November 2006 have not been included in current liabilities
    as we expect to refinance this amount with our term credit
    facilities.



(a) Acquisition credit facilities credit facilities nplfacilidades fpl de crédito

credit facilities nplfacilités fpl de paiement

credit facilities 


During the third quarter, we repaid all amounts outstanding under our Acquisition Credit Facilities which were used to fund a portion of the purchase price for the acquisition of EnCana UK Limited in 2004. We replaced the US$500 million development facility associated with the Acquisition Credit Facilities with the renewal of our term credit facilities. During 2005, the weighted average interest rate on the Acquisition Credit Facilities was 3.9% (2004 - 3.2%).

(b) Canexus LP term credit facilities

Canexus LP has $350 million of committed, secured, revolving term credit facilities which are available until 2009. At December 31, 2005, US$147 million ($171 million) was drawn on these facilities. Borrowings are available as Canadian bankers' acceptances A bankers' acceptance, or BA, is a time draft drawn on and accepted by a bank. Before acceptance, the draft is not an obligation of the bank; it is merely an order by the drawer to the bank to pay a specified sum of money on a specified date to a named person or to the , LIBOR-based loans, Canadian prime rate loans or US-dollar base rate loans. Interest is payable monthly at a floating rate. The term credit facilities are secured by a floating charge debenture debenture (dəbĕn`chər), document acknowledging indebtedness. In Great Britain a debenture is practically the same as a bond, and debenture stock is similar to preferred stock.  over all of Canexus LP's assets and by certain guarantees, security interests and subordination agreements subordination agreement n. a written contract in which a lender who has secured a loan by a mortgage or deed of trust agrees with the property owner to subordinate the first loan to a new loan (thus giving the new loan priority in any foreclosure or payoff).  provided by certain affiliates of Canexus LP (which do not include Nexen). During 2005, the weighted average interest rate on the Canexus LP term credit facilities was 4.8%.

(c) Term credit facilities

We have committed, unsecured Unsecured

A loan or equity interest that is given without any guarantee of payment, performance, satisfaction or opportunity for return from the recipient. No property, interest or security is used as collateral in either a guarantee or a pledge.
, term credit facilities of $2.4 billion which are available until 2010. The lenders have the option to extend the terms annually. Borrowings are available as Canadian bankers' acceptances, LIBOR-based loans, Canadian prime loans, US-dollar base rate loans or British pound call rate loans. Interest is payable monthly at a floating rate. During 2005, the weighted average interest rate was 4.4% (2004 - 3.2%). At December 31, 2005, $250 million of these facilities were utilized to support letters of credit.

(d) Notes, due 2015

In March 2005, we issued US$250 million of notes. Interest is payable semi-annually at a rate of 5.20% and the principal is to be repaid in March 2015. We may redeem redeem v. to buy back, as when an owner who had mortgaged his/her real property pays off the debt. The term also refers to paying the amount due and all charges after a foreclosure (due to failure to make payments when due) has begun.  part or all of the notes at any time. The redemption price Redemption price

See: Call price


redemption price

1. The price at which an open-end investment company will buy back its shares from the owners. In most cases, the redemption price is the net asset value per share.

2.
 will be the greater of par and an amount that provides the same yield as a US Treasury security having a term to maturity equal to the remaining term of the notes plus 0.15%.

(e) Notes, due 2035

In March 2005, we issued US$790 million of notes. Interest is payable semi-annually at a rate of 5.875% and the principal is to be repaid in March 2035. We may redeem part or all of the notes at any time. The redemption price will be the greater of par and an amount that provides the same yield as a US Treasury security having a term to maturity equal to the remaining term of the notes plus 0.2%.
(f) Interest expense
                                  Three Months         Twelve Months
                             Ended December 31     Ended December 31
                                2005      2004        2005      2004
---------------------------------------------------------------------
Long-Term Debt                    63        46         260       182
Other                              3         3          15        12
                             ----------------------------------------
                                  66        49         275       194
 Less: Capitalized               (53)      (24)       (178)      (51)
                             ----------------------------------------
Total                             13        25          97       143
                             ----------------------------------------
                             ----------------------------------------



Capitalized interest Capitalized interest

Interest that is not immediately expensed, but rather is considered as an asset and is then amortized through the income statement over time. In the context of project financing, interest that is paid by additional borrowing.
 relates to and is included as part of the cost of our oil, gas and Syncrude properties, plant and equipment. The capitalization rates Capitalization Rate

According to the Appraisal Institute, it is a method used to convert an estimate of a single year's income expectancy into an indication of value in one direct step, by dividing the income estimate by an appropriate rate.
 are based on our weighted-average cost of borrowings.

(g) Short-term Short-term

Any investments with a maturity of one year or less.


short-term

1. Of or relating to a gain or loss on the value of an asset that has been held less than a specified period of time.
 borrowings

Nexen has uncommitted, unsecured credit facilities of approximately $732 million. No amounts were drawn under these facilities at December 31, 2005 (2004 - $100 million). We have utilized $468 million of these facilities to support letters of credit at December 31, 2005. Interest is payable at floating rates. During 2005, the weighted average interest rate on our short-term borrowings was 3.6% (2004 - 2.9%).

8. ASSET RETIREMENT OBLIGATIONS

Changes in carrying amounts of the asset retirement obligations associated with our property, plant and equipment are as follows:
December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Balance at Beginning of Year                    468              323
 Obligations Assumed with
  Development Activities                         72               12
 Obligations Assumed with
  Business Acquisition                            -              134
 Obligations Discharged with
  Disposed Properties                           (37)              (4)
 Expenditures Made on Asset Retirements         (34)             (31)
 Accretion                                       26               17
 Revisions to Estimates                         138               24
 Effects of Foreign Exchange                    (22)              (7)
                                        -----------------------------
Balance at End of Year 1, 2                     611              468
                                        -----------------------------
                                        -----------------------------

Notes:
(1) Obligations due within 12 months of $21 million
    (2004 - $47 million) have been included in accounts payable and
    accrued liabilities. Obligations related to discontinued
    operations of $22 million have been included with liabilities of
    discontinued operations at December 31, 2004.

(2) Obligations relating to our oil and gas activities amount to $564
    million (2004 - $422 million) and obligations relating to our
    chemicals business amount to $47 million (2004 - $46 million).



Our total estimated undiscounted asset retirement obligations amount to $1,471 million. We have discounted the total estimated asset retirement obligations using a weighted-average, credit-adjusted risk-free rate Risk-free rate

The rate earned on a riskless asset.
 of 5.7%. Approximately $88 million included in our asset retirement obligations will be settled over the next five years. The remaining obligations settle beyond five years and will be funded by future cash flows from our operations.

In connection with the sale of our chemicals business to Canexus LP, we have contributed $14 million to a remediation fund to be used for asset retirement obligations associated with the assets sold. This is included on our balance sheet as part of deferred charges and other assets other assets

Assets of relatively small value. For financial reporting purposes, firms frequently combine small assets into a single category rather than listing each item separately.
.

We own interests in assets for which the fair value of the asset retirement obligations cannot be reasonably determined because the assets currently have an indeterminate That which is uncertain or not particularly designated.


INDETERMINATE. That which is uncertain or not particularly designated; as, if I sell you one hundred bushels of wheat, without stating what wheat. 1 Bouv. Inst. n. 950.
 life and we cannot determine when remediation activities would take place. These assets include our interest in Syncrude's upgrader and sulphur Sulphur, city, United States
Sulphur, city (1990 pop. 20,125), Calcasieu parish, SW La.; inc. 1914. It is a trade center for an area producing natural gas, oil, and timber as well as sorghum, soybeans, cattle, and crawfish.
 pile pile, post of timber, steel, or concrete used to support a structure. Vertical piles, or bearing piles, the most common form, are generally needed for the foundations of bridges, docks, piers, and buildings. Slender tree trunks, roughly trimmed and about 10 in. (25. . The estimated future recoverable reserves at Syncrude are significant and given the long life of this asset, we are unable to determine when asset retirement activities would take place. Furthermore, the Syncrude plant can continue to run indefinitely in·def·i·nite  
adj.
Not definite, especially:
a. Unclear; vague.

b. Lacking precise limits: an indefinite leave of absence.

c.
 with ongoing maintenance activities. The retirement obligations for these assets will be recorded in the first year in which the lives of the assets are determinable.
9. DEFERRED CREDITS AND OTHER LIABILITIES

                                        December 31      December 31
                                               2005             2004
---------------------------------------------------------------------
Fixed Price Natural Gas Contracts
 (Note 10)                                      128                -
Long-Term Marketing Derivative Contracts
 (Note 10)                                      124               46
Deferred Transportation                          87               33
Stock Based Compensation Liability               53                -
Defined Benefit Pension Obligation               39               32
Other                                            48               31
                                        -----------------------------
Total                                           479              142
                                        -----------------------------
                                        -----------------------------



10. DERIVATIVE INSTRUMENTS Derivative instruments

Contracts such as options and futures whose price is derived from the price of an underlying financial asset.
 AND FINANCIAL RISK MANAGEMENT

(a) Carrying value Carrying Value

Also know as "book value," it is a company's total assets minus intangible assets and liabilities, such as debt.

Notes:
This is different than market value, as it can be higher or lower depending on the circumstances.
 and estimated fair value of derivative derivative: see calculus.
derivative

In mathematics, a fundamental concept of differential calculus representing the instantaneous rate of change of a function.
 and financial instruments

The carrying value, fair value, and unrecognized gains or losses on our outstanding derivatives derivatives

In finance, contracts whose value is derived from another asset, which can include stocks, bonds, currencies, interest rates, commodities, and related indexes. Purchasers of derivatives are essentially wagering on the future performance of that asset.
 and long-term financial assets Financial assets

Claims on real assets.
 and liabilities are:
Cdn$ millions                               December 31, 2005
---------------------------------------------------------------------
                                   Carrying     Fair    Unrecognized
                                      Value    Value      Gain/(Loss)
                                  -----------------------------------
Commodity Price Risk
 Non-Trading Activities
  Crude Oil Put Options                   4        4               -
  Fixed Price Natural Gas Contracts    (175)    (175)              -
  Natural Gas Swaps                      29       29               -

 Trading Activities
  Crude Oil and Natural Gas             161      161               -
  Future Sale of Gas Inventory            -      (35)            (35)

Foreign Currency Risk
 Non-Trading Activities                  14       14               -
 Trading Activities                       8        8               -
                                  -----------------------------------
Total Derivatives                        41        6             (35)
                                  -----------------------------------
                                  -----------------------------------

Financial Assets and Liabilities
 Long-Term Debt                      (3,687)  (3,863)           (176)
                                  -----------------------------------
                                  -----------------------------------


Cdn$ millions                               December 31, 2004
---------------------------------------------------------------------
                                   Carrying     Fair    Unrecognized
                                      Value    Value      Gain/(Loss)
                                  -----------------------------------
Commodity Price Risk
 Non-Trading Activities
  Crude Oil Put Options                 200      200               -
  Fixed Price Natural Gas Contracts       -      (98)            (98)
  Natural Gas Swaps                       -        -               -

 Trading Activities
  Crude Oil and Natural Gas              83       83               -
  Future Sale of Gas Inventory            -        6               6

Foreign Currency Risk
 Non-Trading Activities                   7        7               -
 Trading Activities                      10       10               -
                                  -----------------------------------
Total Derivatives                       300      208             (92)
                                  -----------------------------------
                                  -----------------------------------

Financial Assets and Liabilities
 Long-Term Debt                      (4,259)  (4,503)           (244)
                                  -----------------------------------
                                  -----------------------------------



The estimated fair value of all derivative instruments is based on quoted market prices and, if not available, on estimates from third-party brokers or dealers. The carrying value of cash and cash equivalents, restricted cash, amounts receivable and short-term obligations approximates their fair value because the instruments are near maturity.

(b) Commodity price risk management

Non-Trading Activities

We generally sell our crude oil and natural gas under short-term market based contracts.

Crude oil put options

We purchased WTI crude oil put options to manage the commodity price risk exposure of a portion of our oil production in 2005 and 2006. These options established an annual average WTI floor price of US$43/bbl in 2005 and US$38/bbl in 2006 at a cost of $144 million. The WTI crude put options with respect to 2005 production were not used and have expired ex·pire  
v. ex·pired, ex·pir·ing, ex·pires

v.intr.
1. To come to an end; terminate: My membership in the club has expired.

2.
. The WTI crude oil put options with respect to 2006 production are stated at fair market value and are included in deferred charges and other assets as they settle beyond 12 months of December 31, 2005. Any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.
Notional                 Average            Fair
                     Volumes      Term    Price (WTI)          Value
---------------------------------------------------------------------
                     (bbls/d)               (US$/bbl) (Cdn$ millions)
WTI Crude Oil
 Put Options          30,000      2006            39               2
                      20,000      2006            38               1
                      10,000      2006            36               1
                                                      ---------------
                                                                   4
                                                      ---------------
                                                      ---------------



Fixed price natural gas contracts and natural gas swaps

In July July: see month.  and August 2005, we sold certain Canadian oil and gas properties and we retained fixed price natural gas contracts that were previously associated with those properties (see Note 15).

Since these contracts are no longer used in the normal course of our oil and gas operations, they have been marked-to-market Marked-to-market

An arrangement whereby the profits or losses on a futures contract are settled each day.
 and are included in the Unaudited Consolidated Balance Sheet consolidated balance sheet

A balance sheet in which assets and liabilities of a parent company and its controlled subsidiaries are combined, thereby presenting balance sheet items for the parent and its subsidiaries as if they were a single firm.
. Any change in fair value is included in marketing and other in the Unaudited Consolidated Statement of Income.
Notional                                    Fair
                     Volumes         Term      Price           Value
---------------------------------------------------------------------
                       (Gj/d)                  ($/Gj) (Cdn$ millions)
Fixed Price Natural
 Gas Contracts        22,034         2005-      2.28-            (47)
                                     2006       3.72
                      15,514         2007-      2.47-           (128)
                                     2010       2.77
                                                      ---------------
                                                                (175)
                                                      ---------------
                                                      ---------------



Following the sale of the Canadian oil and gas properties, we entered into natural gas swaps to economically hedge our exposure to the fixed price natural gas contracts. Any change in fair value is included in marketing and other in the Unaudited Consolidated Statement of Income.
Notional                                    Fair
                     Volumes         Term      Price           Value
---------------------------------------------------------------------
                       (Gj/d)                  ($/Gj) (Cdn$ millions)
Natural Gas Swaps     22,034         2005-      9.02-
                                     2006      11.81               1
                      15,514         2007-
                                     2010       7.45              28
                                                      ---------------
                                                                  29
                                                      ---------------
                                                      ---------------



Trading Activities

Crude oil and natural gas

We enter into physical purchase and sales contracts Sales Contract

Contract between a seller and buyer for the sale of goods, services, or both.
 as well as financial commodity contracts to enhance our price realizations and lock-in (standard) lock-in - When an existing standard becomes almost impossible to supersede because of the cost or logistical difficulties involved in convincing all its users to switch something different and, typically, incompatible.  our margins. The physical and financial commodity contracts (derivative contracts) are stated at market value. The $161 million fair value of the commodity contracts at December 31, 2005 is included in the Unaudited Consolidated Balance Sheet and any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.

Future Sale of Gas Inventory

We have certain NYMEX See New York Mercantile Exchange.

NYMEX

See New York Mercantile Exchange (NYM).
 futures contracts Futures Contract

An exchange traded agreement to buy or sell a particular type and grade of commodity for delivery at an agreed upon place and time in the future. Futures contracts are transferable between parties.
 and swaps in place, which effectively lock-in our margins on the future sale of our natural gas inventory in storage. We have designated, in writing, some of these derivative contracts as cash flow hedges A cash flow hedge is a hedge of the exposure to the variability of cash flow that
  1. is attributable to a particular risk associated with a recognized asset or liability.
 of the future sale of our storage inventory. As a result, gains and losses on these designated futures contracts and swaps are recognized in net income when the inventory in storage is sold. The principal terms of these outstanding contracts and the unrecognized losses at December 31, 2005 are:
Hedged                 Average        Unrecognized
                Volumes          Month    Price                Loss
---------------------------------------------------------------------
                  (mmcf)               (US$/mcf)     (Cdn$ millions)

NYMEX Natural
 Gas Futures      9,100   January 2006     8.89                 (27)
                    400  February 2006    10.96                   -

NYMEX Natural
 Gas Fixed Price
 and Basis Swaps  4,529   January 2006     9.15                  (8)
                                                      ---------------
                                                                (35)
                                                      ---------------
                                                      ---------------


(c) Foreign currency exchange rate risk management

Non-Trading Activities

                      Amount  Term         Rate           Fair Value
---------------------------------------------------------------------
                                   (for US$1.00)      (Cdn$ millions)
Foreign Currency      Pounds
 Call Options       Sterling
 - Buzzard (i)   207 million  2006         2.00                    -

US Dollar Call
 Options -
 Canexus (ii)  US$11 million  2006        0.813                    6

Foreign Currency
 Swap (iii)    US$37 million  2006        0.736                    8
                                                      ---------------
                                                                  14
                                                      ---------------
                                                      ---------------



(i) Foreign currency call options - Buzzard

Our Buzzard development project in the North Sea creates foreign currency exposure as a portion of the capital costs are denominated in British pounds and Euros. In order to reduce our exposure to fluctuations in these currencies relative to the US dollar, we purchased foreign currency call options in early 2005 which effectively set a ceiling on most of our British pound and Euro spending exposure from March 2005 through to the end of 2006. Any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.

(ii) US dollar call options - Canexus

The operations of Canexus are exposed to changes in the US dollar exchange rate as a portion of their sales are denominated in US dollars. In connection with the initial public offering of Canexus, we purchased US-dollar call options to reduce this exposure to fluctuations in the Canadian - US-dollar exchange rate. Canexus has the right to sell US$11 million monthly and purchase Canadian dollars at an exchange rate of US$0.813 until August 2006. Any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.

(iii) Foreign currency swap Currency Swap

A swap that involves the exchange of principal and interest in one currency for the same in another currency.

Notes:
Currency swaps were originally done to get around the problem of exchange controls.


We occasionally use derivative instruments to effectively convert cash flows from Canadian to US dollars and vice versa VICE VERSA. On the contrary; on opposite sides. . At December 31, 2005, we held a foreign currency derivative instrument Noun 1. derivative instrument - a financial instrument whose value is based on another security
derivative

legal document, legal instrument, official document, instrument - (law) a document that states some contractual relationship or grants some right
 that obligates us and the counterparty Counterparty

The other participant, including intermediaries, in a swap or contract.
 to exchange principal and interest amounts. In November November: see month.  2006, we will pay US$37 million and receive Cdn$50 million. Any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.

Trading Activities

Our sales and purchases of crude oil and natural gas are generally transacted in or referenced to the US dollar, as are most of the financial commodity contracts used by our marketing group. We enter into forward contracts to sell US dollars. When combined with certain commodity sales contracts, either physical or financial, these forward contracts allow us to lock-in our margins on the future sale of crude oil and natural gas. The $8 million fair value of the US-dollar forward contracts and swaps at December 31, 2005 is included in the Unaudited Consolidated Balance Sheet and any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.

(d) Total carrying value of derivative contracts related to trading activities Amounts related to derivative contracts held by our marketing group are equal to fair value as we use mark-to-market Mark-to-market

Adjustment of the book value or collateral value of a security to reflect current market value.
 accounting. The amounts are as follows:
December 31      December 31
Cdn$ millions                                  2005             2004
---------------------------------------------------------------------
Accounts Receivable                             382              177
Deferred Charges and Other Assets (1)           232               91
                                        -----------------------------
 Total Derivative Contract Assets               614              268
                                        -----------------------------
                                        -----------------------------

Accounts Payable and Accrued Liabilities        321              129
Deferred Credits and Other Liabilities (1)      124               46
                                        -----------------------------
 Total Derivative Contract Liabilities          445              175
                                        -----------------------------
                                        -----------------------------

 Total Derivative Contract Net Assets (2)       169               93
                                        -----------------------------
                                        -----------------------------

Notes:
(1) These derivative contracts settle beyond 12 months and are
    considered non-current.
(2) Comprised of $161 million (2004 - $83 million) related to
    commodity contracts and $8 million (2004 - $10 million) related
    to US dollar forward contracts and swaps.



Our exchange-traded derivatives are subject to margin deposit requirements. We are required to advance cash to counterparties Counterparties

The parties on either side of an interest rate swap or a currency, equity or commodity swap, or to an options or futures position.
 in order to satisfy these requirements. We did not have any margin deposit requirements at December 31, 2005 and 2004.

11. SHAREHOLDERS' EQUITY Shareholders' Equity

A firms' total assets minus its total liabilities. Equivalently, it is share capital plus retained earnings minus treasury shares. Shareholders' equity is the amount by which a company is financed through common and preferred shares.


Dividends

Dividends per common share for the three months ended December 31, 2005 were $0.05 (2004 - $0.05). Dividends per common share for the twelve months ended December 31, 2005 were $0.20 (2004 - $0.20).

12. EARNINGS PER COMMON SHARE

Our shareholders approved a split of our issued and outstanding common shares on a two-for-one basis at our annual and special meeting on April 27, 2005. All common share and per common share amounts have been restated to retroactively reflect this share split.

We calculate basic earnings per common share from continuing operations continuing operations

Parts of a business that are expected to be maintained as an ongoing segment of an overall business operation. Income and losses from continuing operations are reported separately if any segments have been discontinued during the
 using net income from continuing operations divided by the weighted-average number of common shares outstanding. We calculate basic earnings per common share using net income and the weighted-average number of common shares outstanding. We calculate diluted earnings per common share from continuing operations and diluted earnings per common share in the same manner as basic, except we use the weighted-average number of diluted common shares outstanding in the denominator denominator

the bottom line of a fraction; the base population on which population rates such as birth and death rates are calculated.

denominator 
.
Three Months          Twelve Months
                            Ended December 31      Ended December 31
(millions of shares)           2005      2004         2005      2004
---------------------------------------------------------------------
Weighted-average number of
 common shares outstanding    261.0     258.3        260.4     257.3
Shares issuable pursuant to
 stock options                 12.3      12.4         13.4      13.1
Shares to be purchased from
 proceeds of stock options     (6.0)     (9.0)        (7.4)     (9.8)
                            -----------------------------------------
Weighted-average number of
 diluted common shares
 outstanding                  267.3     261.7        266.4     260.6
                            -----------------------------------------
                            -----------------------------------------



In calculating the weighted-average number of diluted common shares outstanding we excluded 1,105,333 options (2004 - 1,388,800) for the three months ended December 31, 2005 and 280,708 options (2004 - 348,200) for the twelve months ended December 31, 2005 because their exercise price was greater than the average common share market price in the period. During the periods presented, outstanding stock options were the only potential dilutive instruments.
13. CASH FLOWS

(a) Charges and credits to income not involving cash

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Depreciation, Depletion,
 Amortization and Impairment        304       194    1,052       674
Stock Based Compensation             21       (26)     411        74
Future Income Taxes                  41        50     (100)       69
Change in Fair Value of Crude
 Oil Put Options                     12       (56)     196       (56)
Non-Cash Items included in
 Discontinued Operations              -        37     (325)      132
Unamortized Issue Costs on
 Redemption of Preferred Securities   -         -        -        11
Gain on Disposition of Assets         -       (20)      (4)      (24)
Gain on Dilution of Interest in
 Chemicals Business                   -         -     (193)        -
Net Income Attributable to
 Non-Controlling Interests            3         -        8         -
Other                                22        31       24        26
                               --------------------------------------
Total                               403       210    1,069       906
                               --------------------------------------
                               --------------------------------------


(b) Changes in non-cash working capital

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
 Accounts Receivable               (261)     (320)  (1,078)     (454)
 Inventories and Supplies            11        40     (163)     (106)
 Other Current Assets                 5         7      (10)       44
 Accounts Payable and Accrued
  Liabilities                       (85)      390      982       650
 Accrued Interest Payable            15        (3)      20       (12)
                               --------------------------------------
Total                              (315)      114     (249)      122
                               --------------------------------------
                               --------------------------------------

Relating to:
 Operating Activities              (315)      (23)    (195)     (122)
 Investing Activities                 -       137      (54)      244
                               --------------------------------------
Total                              (315)      114     (249)      122
                               --------------------------------------
                               --------------------------------------


(c) Other cash flow information

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Interest Paid                        47        47      237       190
Income Taxes Paid                    77        67      325       249
                               --------------------------------------


14. MARKETING AND OTHER

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Marketing Revenue, Net              379       217      847       608
Change in Fair Value of Crude
 Oil Put Options                    (12)       56     (196)       56
Interest                              7         4       29        12
Foreign Exchange Losses             (20)      (19)     (19)      (13)
Other                                18        28       41        50
                               --------------------------------------
Total                               372       286      702       713
                               --------------------------------------
                               --------------------------------------



15. DISCONTINUED OPERATIONS Discontinued operations

Divisions of a business that have been sold or written off and that no longer are maintained by the business.


In the third quarter of 2005, we sold certain Canadian conventional oil and gas properties in southeast Southeast or south east is the ordinal direction halfway between south and east. It the opposite of northwest.

Southeast or South East can refer to:
 Saskatchewan Saskatchewan, province, Canada
Saskatchewan (səskăch`əwən, –wän', săs'–), province (2001 pop. 978,933), 251,700 sq mi (651,903 sq km), W Canada.
, northwest For names and places containing the slightly longer word 'northwestern' (or variants), see .

Northwest or north west is the ordinal direction halfway between north and west on a compass. It is the opposite of southeast.
 Saskatchewan, northeast “Northeastern” redirects here. For the Boston college, see Northeastern University, Boston.

Northeast or north east is the ordinal direction halfway between north and east. It is the opposite of southwest. See boxing the compass.
 British Columbia British Columbia, province (2001 pop. 3,907,738), 366,255 sq mi (948,600 sq km), including 6,976 sq mi (18,068 sq km) of water surface, W Canada. Geography
 and the Alberta foothills. The results of operations of these properties have been presented as discontinued operations. The sales closed in the third quarter with net proceeds of $900 million after closing adjustments and we realized gains Realized Gain

A gain resulting from selling an asset at a price higher than the original purchase price.

Notes:
There may be tax consequences for a realized profit.
 of $225 million. These gains are net of losses attributable attributable

emanating from or pertaining to attribute.


attributable proportion
see attributable risk (below).

attributable risk
 to pipeline contracts and fixed price gas sales contracts associated with these properties that we have retained but no longer use in connection with our oil and gas business.

During the fourth quarter of 2004, we concluded production from our Buffalo field, offshore Australia Australia (ôstrāl`yə), smallest continent, between the Indian and Pacific oceans. With the island state of Tasmania to the south, the continent makes up the Commonwealth of Australia, a federal parliamentary state (2005 est. pop. . The results of our operations in Australia have been presented as discontinued operations, as we have no plans to continue operations in the country. Remediation and abandonment abandonment, in law, voluntary, intentional, and absolute relinquishment of rights or property without conveying them to any other person. Abandonment also means willfully leaving one's spouse or children, intending not to return (see desertion).  activities have been completed and no gain or loss was recognized.

The results of operations from these properties in Australia and Canada are detailed below and shown as discontinued operations in our Unaudited Consolidated Statement of Income.
Three months ended December 31

                                    2005              2004
                                  Canada    Canada  Australia  Total
-----------------------------------------  --------------------------
Revenues
 Net Sales                             -        61         26     87
 Marketing and Other                   -         1          -      1
                                 --------  --------------------------
                                       -        62         26     88
Expenses
 Operating                             -         9         22     31
 Depreciation, Depletion,
  Amortization and Impairment          -        18          -     18
 Exploration                           -         2          -      2
                                 --------  --------------------------
Income before Income Taxes             -        33          4     37
 Future Income Taxes                   -        17          -     17
                                 --------  --------------------------
Net Income from Discontinued
 Operations                            -        16          4     20
                                 --------  --------------------------
                                 --------  --------------------------

Earnings per Common Share
 Basic                                 -      0.06       0.02   0.08
                                 --------  --------------------------
                                 --------  --------------------------
 Diluted                               -      0.06       0.02   0.08
                                 --------  --------------------------
                                 --------  --------------------------


Twelve months ended December 31

                                    2005              2004
                                  Canada    Canada  Australia  Total
-----------------------------------------  --------------------------
Revenues
 Net Sales                           154       232         75    307
 Marketing and Other                   -         1          -      1
 Gain on Disposition of Assets       225         -          -      -
                                 --------  --------------------------
                                     379       233         75    308
Expenses
 Operating                            27        40         53     93
 Depreciation, Depletion,
  Amortization and Impairment         28        70          9     79
 Exploration Expense                   1         3          -      3
                                 --------  --------------------------
Income before Income Taxes           323       120         13    133
 Future Income Taxes                (129)       50          -     50
                                 --------  --------------------------
Net Income from Discontinued
 Operations                          452        70         13     83
                                 --------  --------------------------
                                 --------  --------------------------

Earnings per Common Share
 Basic                              1.74      0.27       0.05   0.32
                                 --------  --------------------------
                                 --------  --------------------------
 Diluted                            1.70      0.27       0.05   0.32
                                 --------  --------------------------
                                 --------  --------------------------



Assets and liabilities on the Unaudited Consolidated Balance Sheet include the following amounts for discontinued operations. There were no assets and liabilities related to discontinued operations at December 31, 2005.
As at December 31, 2004

                                            Canada  Australia  Total
---------------------------------------------------------------------
Cash and Cash Equivalents                        -          1      1
Accounts Receivable                             28          8     36
Other Current Assets                             -          1      1
Property, Plant and Equipment, Net             440          -    440
Accounts Payable and Accrued Liabilities        14         25     39
Asset Retirement Obligations                    22          -     22
Future Income Tax Liabilities                  108          -    108
                                           ------------------- ------



16. COMMITMENTS, CONTINGENCIES Contingencies (ISSN 1048-9851) is the bimonthly magazine of the American Academy of Actuaries, providing a large and diverse readership with general interest and technical articles on a wide range of issues related to the actuarial profession.  AND GUARANTEES

As described in Note 12 to the Audited Consolidated Financial Statements included in our 2004 Annual Report on Form 10-K, there are a number of lawsuits and claims pending, the ultimate results of which cannot be ascertained as·cer·tain  
tr.v. as·cer·tained, as·cer·tain·ing, as·cer·tains
1. To discover with certainty, as through examination or experimentation. See Synonyms at discover.

2.
 at this time. We record costs as they are incurred or become determinable. We believe the resolution of these matters would not have a material adverse effect on our liquidity, consolidated financial position or results of operations.
17. PENSION AND OTHER POST RETIREMENT BENEFITS

Net pension expense recognized under our defined benefit pension
plans

                                     Three Months      Twelve Months
                                Ended December 31  Ended December 31
                                   2005      2004     2005      2004
---------------------------------------------------------------------
Nexen(1)
 Cost of Benefits Earned
  by Employees                        6         2       16         8
 Interest Cost on Benefits Earned     3         3       13        12
 Expected Return on Plan Assets      (3)       (2)     (11)      (11)
 Net Amortization and Deferral        -         1        1         1
                               --------------------------------------
 Net                                  6         4       19        10
                               --------------------------------------

Syncrude
 Cost of Benefits Earned
  by Employees                        1         -        4         3
 Interest Cost on Benefits Earned     1         2        5         5
 Expected Return on Plan Assets      (1)       (1)      (4)       (4)
 Net Amortization and Deferral        3         1        3         1
                               --------------------------------------
 Net                                  4         2        8         5
                               --------------------------------------
Total                                10         6       27        15
                               --------------------------------------
                               --------------------------------------
Note:
(1) Includes pension expense related to Canexus defined benefit
    pension plan.



18. OPERATING SEGMENTS AND RELATED INFORMATION

Nexen is involved in activities relating to Oil and Gas, Syncrude and Chemicals in various geographic geographic /geo·graph·ic/ (je?o-graf´ik) in pathology, of or referring to a pattern that is well demarcated, resembling outlines on a map.

geographic

pertaining to geography.
 locations as described in Note 18 to the Audited Consolidated Financial Statements included in our 2004 Annual Report on Form 10-K.
Three months ended December 31, 2005

(Cdn$ millions)                   Oil and Gas
---------------------------------------------------------------------
                              United   United       Other
               Yemen  Canada  States  Kingdom Countries(2) Marketing
---------------------------------------------------------------------

Net Sales        352     139     199      124          41         12
Marketing
 and Other         2       1       2       15           -        379
Gain on
 Dilution
 of Interest
 In Chemicals
 Business          -       -       -        -           -          -
---------------------------------------------------------------------
Total
 Revenues        354     140     201      139          41        391
Less:
 Expenses
 Operating        41      36      27       19           5         10
 Depreciation,
  Depletion,
  Amortization
  and Impairment
  (DD&A)          98      35      52       95           2          3
 Transportation
  and Other        2       6       1        -           2        179
 General and
  Administrative
  (4)              3      12      13        3          21         17
 Exploration       7       8      17       33        21(5)         -
 Interest          -       -       -        -           -          -
---------------------------------------------------------------------
Income (Loss)
 from Continuing
 Operations
 before Income
 Taxes           203      43      91      (11)        (10)       182
---------------------------------------------------------------------
---------------------------------------------------------------------
Less: Provision
 for Income
 Taxes (6)
Less: Non
 Controlling
 Interests
Add: Net
 Income from
 Discontinued
 Operations
Net Income

Identifiable
 Assets          635   2,449   1,433    4,775         183    3,165(7)
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital
 Expenditures
 Development
  and Other       52     296      53      142           4          2
 Exploration      14      37      33        8           7          -
 Proved
  Property
  Acquisitions     -       -       -        -           -          -
---------------------------------------------------------------------
                  66     333      86      150          11          2
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant
 and Equipment
 Cost          2,243   3,631   2,437    4,013         249        177
 Less:
  Accumulated
  DD&A         1,841   1,311   1,159      216         119         72
---------------------------------------------------------------------
Net Book
 Value           402   2,320   1,278    3,797         130        105
---------------------------------------------------------------------
---------------------------------------------------------------------


                                       Corporate
                                             and
(Cdn$ millions)           Syncrude(1)  Chemicals     Other     Total
---------------------------------------------------------------------



Net Sales                        105         101         -     1,073
Marketing and Other                -          (1)   (26)(3)      372
Gain on Dilution of Interest
 In Chemicals Business             -           -         -         -
---------------------------------------------------------------------
Total Revenues                   105         100       (26)    1,445
Less: Expenses
 Operating                        42          63         -       243
 Depreciation, Depletion,
  Amortization and
  Impairment (DD&A)                4           9         6       304
 Transportation and Other          8          10        18       226
 General and Administrative(4)     1           6        69       145
 Exploration                       -           -         -        86
 Interest                          -           2        11        13
---------------------------------------------------------------------
Income (Loss) from
 Continuing Operations
 before Income Taxes              50          10      (130)      428
-----------------------------------------------------------
-----------------------------------------------------------
Less: Provision for
 Income Taxes (6)                                                125
Less: Non Controlling
 Interests                                                         3
Add: Net Income from
 Discontinued Operations                                           -
                                                             --------
Net Income                                                       300
                                                             --------
                                                             --------

Identifiable Assets            1,135         482       333    14,590
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital Expenditures
 Development and Other            48           5        14       616
 Exploration                       -           -         -        99
 Proved Property
  Acquisitions                     -           -         -         -
---------------------------------------------------------------------
                                  48           5        14       715
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant and Equipment
 Cost                          1,240         827       245    15,062
 Less: Accumulated DD&A          171         456       123     5,468
---------------------------------------------------------------------
Net Book Value                 1,069         371       122     9,594
---------------------------------------------------------------------
---------------------------------------------------------------------

Notes:

(1) Syncrude is considered a mining operation for US reporting
    purposes. Property, plant and equipment at December 31, 2005
    include mineral rights of $6 million.
(2) Includes results of operations from producing activities in
    Nigeria and Colombia.
(3) Includes interest income of $7 million, foreign exchange losses
    of $20 million, decrease in the fair value of crude oil put
    options of $12 million, and decrease in the fair value of foreign
    currency call options of $1 million.
(4) Includes stock based compensation expense of $40 million.
(5) Includes exploration activities primarily in Nigeria, Colombia
    and Equatorial Guinea.
(6) Includes Yemen cash taxes of $74 million.
(7) Approximately 86% of marketing's identifiable assets are accounts
    receivable and inventories.



Twelve months ended December 31, 2005

(Cdn$ millions)                   Oil and Gas
---------------------------------------------------------------------
                              United   United       Other
               Yemen  Canada  States  Kingdom Countries(2) Marketing
---------------------------------------------------------------------

Net Sales      1,377     455     792      366         119         28
Marketing
 and Other         8       3       2       16           4        847
Gain on
 Dilution of
 Interest
 in Chemicals
 Business          -       -       -        -           -          -
---------------------------------------------------------------------
Total
 Revenues      1,385     458     794      382         123        875
Less: Expenses
 Operating       150     121      96       95          12         30
 Depreciation,
  Depletion,
  Amortization
  and Impairment
  (DD&A)         354     140     234      210          13         11
 Transportation
  and Other        6      23       1        -           2        641
 General and
  Administrative
  (5)             42     105      84        8          97         89
 Exploration      12      23     100       51        64(6)         -
 Interest          -       -       -        -           -          -
---------------------------------------------------------------------
Income (Loss)
 from Continuing
 Operations
 before Income
 Taxes           821      46     279       18         (65)       104
---------------------------------------------------------------------
---------------------------------------------------------------------
Less: Provision
 for Income
 Taxes(7)
Less: Non
 Controlling
 Interest
Add: Net
 Income from
 Discontinued
 Operations (8)
Net Income

Identifiable
 Assets          635   2,449   1,433    4,775         183    3,165(9)
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital
 Expenditures
 Development
  and Other      236     947     148      566          14         16
 Exploration      41      90     211       59          55          -
 Proved
  Property
  Acquisitions     -      17       3        -           -          -
---------------------------------------------------------------------
                 277   1,054     362      625          69         16
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant
 and Equipment
 Cost          2,243    3,631  2,437    4,013         249        177
 Less:
  Accumulated
  DD&A         1,841    1,311  1,159      216         119         72
---------------------------------------------------------------------
Net Book
 Value           402    2,320  1,278    3,797         130        105
---------------------------------------------------------------------
---------------------------------------------------------------------


                                                 Corporate
                                                       and
(Cdn$ millions)           Syncrude(1)  Chemicals     Other     Total
---------------------------------------------------------------------



Net Sales                        397         398         -     3,932
Marketing and Other                -          15   (193)(3)      702
Gain on Dilution of
 Interest in Chemicals
 Business                          -         193         -       193
---------------------------------------------------------------------
Total Revenues                   397         606      (193)    4,827
Less: Expenses
 Operating                       152         237         -       893
 Depreciation, Depletion,
 Amortization and
 Impairment (DD&A)                17        51(4)       22     1,052
 Transportation and Other         21          40        62       796
 General and Administrative(5)     1          45       321       792
 Exploration                       -           -         -       250
 Interest                          -           3        94        97
---------------------------------------------------------------------
Income (Loss) from
 Continuing Operations
 before Income Taxes             206         230      (692)      947
-----------------------------------------------------------
-----------------------------------------------------------
Less: Provision for
 Income Taxes(7)                                                 239
Less: Non Controlling
 Interest                                                          8
Add: Net Income from
 Discontinued Operations(8)                                      452
                                                             --------
Net Income                                                     1,152
                                                             --------
                                                             --------

Identifiable Assets            1,135         482       333    14,590
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital Expenditures
 Development and Other           197          14        24     2,162
 Exploration                       -           -         -       456
 Proved Property Acquisitions      -           -         -        20
---------------------------------------------------------------------
                                 197          14        24     2,638
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant and Equipment
 Cost                          1,240         827       245    15,062
 Less: Accumulated DD&A          171         456       123     5,468
---------------------------------------------------------------------
Net Book Value                 1,069         371       122     9,594
---------------------------------------------------------------------
---------------------------------------------------------------------

Notes:
(1) Syncrude is considered a mining operation for US reporting
    purposes. Property, plant and equipment at December 31, 2005
    includes mineral rights of $6 million.
(2) Includes results of operations from producing activities in
    Nigeria and Colombia.
(3) Includes interest income of $29 million, foreign exchange losses
    of $19 million, decrease in the fair value of crude oil put
    options of $196 million and decrease in the fair value of foreign
    currency call options of $7 million.
(4) Includes impairment charge of $12 million related to the closure
    of our sodium chlorate plant in Amherstburg, Ontario.
(5) Includes stock based compensation expense of $490 million.
(6) Includes exploration activities primarily in Nigeria, Colombia
    and Equatorial Guinea.
(7) Includes Yemen cash taxes of $296 million.
(8) During the third quarter of 2005, we concluded the sale of
    certain Canadian conventional oil and gas properties. The results
    of these properties are shown as discontinued operations (see
    Note 15).
(9) Approximately 86% of marketing's identifiable assets are accounts
    receivable and inventories.



Three months ended December 31, 2004
(Cdn$ millions)

                                  Oil and Gas
---------------------------------------------------------------------
                                                    Other
               Yemen  Canada      US     UK(2)Countries(3) Marketing
---------------------------------------------------------------------

Net Sales        242     100     230       36          20          4
Marketing and
 Other             2    21(4)      1        -           2        217
---------------------------------------------------------------------
Total Revenues   244     121     231       36          22        221
Less: Expenses
 Operating        29      29      25        6           1          4
 Depreciation,
  Depletion,
  Amortization
  and Impairment  46      32      73       18           4          2
 Transportation
  and Other        3       5       -        -           -        125
 General and
  Administrative
  (6)              2       1       2        -           8         20
 Exploration       -       6      85        3        42(7)         -
 Interest          -       -       -        -           -          -
---------------------------------------------------------------------
Income (Loss)
 from Continuing
 Operations
 before Income
 Taxes           164      48      46        9         (33)        70
---------------------------------------------------------------------
---------------------------------------------------------------------
Less: Provision
 for Income
 Taxes(8)
Add: Net Income
 from
 Discontinued
 Operations(9)
Net Income

Identifiable
 Assets          564   1,979   1,359    4,446         218   2,030(10)
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital
 Expenditures
 Development
  and Other       91     184      68       53          16          1
 Exploration       8      33      78        4          25          -
 Proved Property
  Acquisitions     -       4       -        -           -          -
---------------------------------------------------------------------
                  99     221     146       57          41          1
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant
 and Equipment
 Cost          2,038   2,603   2,249    3,499         535        157
 Less:
  Accumulated
  DD&A         1,550   1,195   1,037       16         408         64
---------------------------------------------------------------------
 Net Book
  Value          488 1,408(11) 1,212    3,483         127         93
---------------------------------------------------------------------
---------------------------------------------------------------------


(Cdn$ millions)                                  Corporate
                                                       and
                          Syncrude(1)  Chemicals     Other     Total
---------------------------------------------------------------------



Net Sales                       78            95         -       805
Marketing and Other              -             2        41(5)    286
---------------------------------------------------------------------
Total Revenues                  78            97        41     1,091
Less: Expenses
 Operating                      35            59         -       188
 Depreciation, Depletion,
  Amortization and Impairment    5             9         5       194
 Transportation and Other        4            13        11       161
 General and Administrative(6)   1             3        15        52
 Exploration                     -             -         -       136
 Interest                        -             -        25        25
---------------------------------------------------------------------
Income (Loss) from
 Continuing Operations
 before Income Taxes            33            13       (15)      335
-----------------------------------------------------------
-----------------------------------------------------------
Less: Provision for
 Income Taxes(8)                                                 109
Add: Net Income from
 Discontinued Operations(9)                                       20
                                                              -------
Net Income                                                       246
                                                              -------
                                                              -------

Identifiable Assets            912           497       378    12,383
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital Expenditures
 Development and Other          59            11        14       497
 Exploration                     -             -         -       148
 Proved Property Acquisitions    -             -         -         4
---------------------------------------------------------------------
                                59            11        14       649
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant and
 Equipment
 Cost                        1,030           815       201    13,127
 Less: Accumulated DD&A        155           409        90     4,924
---------------------------------------------------------------------
 Net Book Value                875           406       111     8,203
---------------------------------------------------------------------
---------------------------------------------------------------------

Notes:
1  Syncrude is considered a mining operation for US reporting
   purposes. Property, plant and equipment at December 31, 2004
   includes mineral rights of $6 million.
2  On December 1, 2004 we acquired EnCana (U.K.) Limited.
3  Includes results of operations from producing activities in
   Nigeria and Colombia.
4  Includes gains on dispositions from the sale of minor oil and gas
   assets.
5  Includes interest income of $4 million and foreign exchange losses
   of $19 million and fair value gains on crude oil put options of
   $56 million.
6  Includes a $24 million decrease in our stock based compensation
   obligations revalued each reporting period based on the change in
   the market value of our common shares.
7  Includes exploration activities primarily in Nigeria.
8  Includes Yemen cash taxes of $59 million.
9  In the fourth quarter of 2004 we concluded production activities
   in Australia. During the third quarter of 2005, we concluded the
   sale of certain Canadian conventional oil and gas properties. The
   combined results of these dispositions are shown as discontinued
   operations (Note 15).
10 Approximately 81% of Marketing's identifiable assets are accounts
   receivable and inventories.
11 Excludes PP&E costs of $860 million and accumulated depreciation
   depletion and amortization of $420 million relating to the
   Canadian properties disposed of during 2005 (Note 15).



Twelve months ended December 31, 2004
(Cdn$ millions)

                                  Oil and Gas
---------------------------------------------------------------------
                                                    Other
               Yemen  Canada      US     UK(2)Countries(3) Marketing
---------------------------------------------------------------------

Net Sales        921     390     811       36          73         14
Marketing and
 Other             5      27(4)   11        -           2        608
---------------------------------------------------------------------
Total Revenues   926     417     822       36          75        622
Less: Expenses
 Operating       109     116     106        6           7         16
 Depreciation,
  Depletion,
  Amortization
  and
  Impairment     169     128     258       18          18         10
 Transportation
  and Other        5      15       -        -           -        451
 General and
 Administrative(6) 4      42      30        -          47         58
 Exploration       2      18     138        3          82(7)       -
 Interest          -       -       -        -           -          -
---------------------------------------------------------------------
Income (Loss)
 from
 Continuing
 Operations
 before Income
 Taxes           637      98     290        9         (79)        87
---------------------------------------------------------------------
---------------------------------------------------------------------
Less: Provision
 for Income
 Taxes(8)
Add: Net Income
 from
 Discontinued
 Operations(9)
Net Income

Identifiable
 Assets          564   1,979   1,359    4,446         218   2,030(10)
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital
 Expenditures
 Development
  and Other      267     491     267       53          24          4
 Exploration      19      46     133        4          64          -
 Proved Property
  Acquisitions     -       4       -        -           -          -
---------------------------------------------------------------------
                 286     541     400       57          88          4
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant
 and Equipment
 Cost          2,038   2,603   2,249    3,499         535        157
 Less:
  Accumulated
  DD&A         1,550   1,195   1,037       16         408         64
---------------------------------------------------------------------
 Net Book
  Value         488 1,408(11)  1,212    3,483         127         93
---------------------------------------------------------------------
---------------------------------------------------------------------


(Cdn$ millions)                                  Corporate
                                                       and
                          Syncrude(1)  Chemicals     Other     Total
---------------------------------------------------------------------

Net Sales                      321           378         -     2,944
Marketing and Other              -             5        55(5)    713
---------------------------------------------------------------------
Total Revenues                 321           383        55     3,657
Less: Expenses
 Operating                     125           237         -       722
 Depreciation, Depletion,
  Amortization and Impairment   18            37        18       674
 Transportation and Other       12            41        25       549
 General and
  Administrative(6)              1            28        89       299
 Exploration                     -             -         -       243
 Interest                        -             -       143       143
---------------------------------------------------------------------
Income (Loss) from
 Continuing Operations
 before Income Taxes           165            40      (220)    1,027
-----------------------------------------------------------
-----------------------------------------------------------
Less: Provision for
 Income Taxes(8)                                                 317
Add: Net Income from
 Discontinued Operations(9)                                       83
                                                             --------
Net Income                                                       793
                                                             --------
                                                             --------

Identifiable Assets            912           497       378    12,383
---------------------------------------------------------------------
---------------------------------------------------------------------

Capital Expenditures
 Development and Other         214            58        33     1,411
 Exploration                     -             -         -       266
 Proved Property Acquisitions    -             -         -         4
---------------------------------------------------------------------
                               214            58        33     1,681
---------------------------------------------------------------------
---------------------------------------------------------------------

Property, Plant and Equipment
 Cost                        1,030           815       201    13,127
 Less: Accumulated DD&A        155           409        90     4,924
---------------------------------------------------------------------
 Net Book Value                875           406       111     8,203
---------------------------------------------------------------------
---------------------------------------------------------------------

Notes:
1  Syncrude is considered a mining operation for US reporting
   purposes. Property, plant and equipment at December 31, 2004
   includes mineral rights of $6 million.
2  On December 1, 2004 we acquired EnCana (U.K.) Limited.
3  Includes results of operations from producing activities in
   Nigeria and Colombia
4  Includes gains on dispositions from the sale of minor oil and gas
   assets.
5  Includes interest income of $12 million, foreign exchange losses
   of $13 million and fair value gains on crude oil put options of
   $56 million.
6  Includes a one-time charge of $82 million related to the
   modification of our stock option plan and a $15 million decrease
   in our stock based compensation obligations revalued each
   reporting period based on the change in the market value of our
   common shares.
7  Includes exploration activities primarily in Nigeria and Colombia.
8  Includes Yemen cash taxes of $227 million.
9  In the fourth quarter of 2004, we concluded production activities
   in Australia. During the third quarter of 2005, we concluded the
   sale of certain Canadian conventional oil and gas properties. The
   combined results of these dispositions are shown as discontinued
   operations (Note 15).
10 Approximately 81% of Marketing's identifiable assets are accounts
   receivable and inventories.
11 Excludes PP&E costs of $860 million and accumulated depreciation
   depletion and amortization of $420 million relating to the
   Canadian properties disposed of during 2005 (Note 15).



Nexen Inc. (TSX TSX Toronto Stock Exchange (TSE before April, 2002)
TSX Transfer from Stack Pointer to Index
TSX True Space Extension
:NXY) (NYSE NYSE

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:NXY)
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Comment:Nexen Inc. Delivers Record Fourth Quarter and Annual Financial Results in 2005.
Publication:Business Wire
Geographic Code:1CANA
Date:Feb 17, 2006
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