Canadian Superior Announces Successful Completion of 'Mariner Project' Wellsite Survey Work at Two New Proposed Future Drilling Locations, Offshore, Nova Scotia, Canada.

CALGARY, Alberta & HALIFAX, Nova Scotia -- Canadian Superior Energy Inc. ("Canadian Superior") (AMEX:SNG) (TSX:SNG) of Calgary, Alberta announced today that its offshore wellsite survey work, initiated earlier in August, has been successfully completed at two new proposed future "Mariner Project" drilling locations. The field work was completed on August 29th on the offshore "Mariner" Block (EL 2409) located in shallow water approximately 275 kilometres (170 miles) southeast of Halifax, Nova Scotia, Canada. The geophysical survey field work was undertaken by Fugro Jacques GeoSurvey's Inc. of Dartmouth, Nova Scotia using the M/V Anticosti.

Speaking in Halifax today, Mike Coolen, Canadian Superior's Vice President, East Coast Operations, said, "The wellsite survey field work went very well. We are very pleased to have completed this work, another important step in progressing our drilling, procurement and permitting activities to advance further drilling on our 'Mariner Project' lands. The two new proposed future locations, just surveyed, are illustrated on various maps on our Company's website at www.cansup.com."

The "Mariner Project" represents a Cretaceous gas play Offshore Nova Scotia which is a proven producing play type in the area. The "Mariner" block (EL 2409) is a shallow water block encompassing a total area of 101,800 acres and directly offsets five significant discoveries offshore Nova Scotia near Sable Island including ExxonMobil's Venture natural gas field. Three large prospects have been identified for drilling on the "Mariner" block utilizing high-resolution seismic acquired in late 2002. The first exploration well on this block, the "Mariner" I-85 well, a High Temperature High Pressure (HTHP) well, was drilled and evaluated in November 2003 - March 2004. The results of this well are discussed in Canadian Superior's 2004 First and Second Quarter Reports which are available for viewing on the Company's website, by following the "FINANCIAL STATEMENTS" link button near the top left of the home page.

Canadian Superior is a Calgary, Alberta based oil and gas exploration and production company with operations in western Canada, offshore Nova Scotia and offshore Trinidad and Tobago. The Company is one of the largest acreage holders offshore Nova Scotia, with interests in 1,293,946 acres offshore Nova Scotia (See: Canadian Superior's website at www.cansup.com to review Canadian Superior's "Marquis, Mariner, Mayflower, Marauder and Marconi Offshore Projects" and to view the "Table of Major Offshore Nova Scotia Acreage Holders" and "Offshore Nova Scotia Maps", to review information on the Company's Western Canadian operations and for information and detailed maps regarding Canadian Superior's Trinidad "Tradewinds" Offshore Project and the recently awarded Block 5 (C)).

This press release contains forward-looking information on future production, project start-ups and future capital spending. Actual results could differ materially due to changes in project schedules, operating performance, demand for oil and gas, commercial negotiations or other technical and economic factors. Statements contained in this press release relating to future results, events and expectations are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievement of the Company, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such statements. Such factors include, among others, those described in the Company's annual report on Form 40-F on file with the U.S. Securities and Exchange Commission.