Russia - Reserves Doubled.
The company's gas reserves has grown 2.3 times compared to the level registered at end-2010. This significant increase in gas reserves is due to a review at the company's largest gas field, Kharampurskoye.
DeGolyer & MacNaughton also audited Rosneft's hydrocarbon reserves under PRMS classification. Proven hydrocarbon reserves as of Dec. 31, 2011 stood at 23,352m boe. Of this total, oil reserves stood at 18,351m barrels (2,519m tons) and gas reserves at 30.004 TCF (850 BCM).
As of 2011, Rosneft's reserve life was 25 years; 21 years for oil and 68 for gas. Furthermore, DeGolyer & MacNaughton audited Rosneft's resources. As of Dec. 31, 2011, the mean estimate of the company's prospective recoverable hydrocarbon resources was 134bn boe - three times as much as at the end of 2010. This was due to the acquisition of licence blocks on the Kara and Black Sea shelves.
Rosneft also obtained licences for five promising blocks on the Sea of Okhotsk shelf at the end of 2011. Resources contained within these blocks were not included in the audit but were preliminarily estimated at over 20bn boe. Rosneft said these figures confirmed its status as one of the world's largest public oil companies by proven liquid hydrocarbon reserves. The company has also sealed its position as the absolute leader in terms of hydrocarbon resources.
Rosneft is the first Russian oil company which has begun exploration of the hard-to-recover Turonian natural gas deposits, the reserves of which in western Siberia alone are estimated at several trillion cubic metres. This is stated in the materials of the company which has already placed an order for exploring the Turonian low-permeability gas reservoirs with the subsidiary RN-UfaNIPIneft. The first gas of the Turonian deposits was produced in 2011 at the Yuzhno-Russkoya field of Severneftegazprom - a joint venture of Gazprom, BASF SE and E.ON.
Severneftegazprom head Stanislav Tsygankov said: "the project for the development of the Turonian deposit is a pilot one not only for us, but also for Gazprom and Russia in general. These are hard-to-recover reserves, which lie above the Cenomanian stage, usually at depths of 810-840 metres. They are noted for the heterogeneity and variability in lithological composition, low permeability of reservoirs. So far, nobody has engaged in commercial development of these natural gas deposits in the country, although its reserves in western Siberia alone are estimated at several trillion cubic meters as a minimum". (It is said in Rosneft's materials that gas production of the company is limited by the access to Gazprom's transport system).
At end-2010 the proven gas reserves of Rosneft (by PRMS classification) were 791 BCM, and the company was developing less than a quarter of these reserves. About 70% of the company's proven gas reserves are located in the Yamalo-Nenets Autonomous Area, and the Kharampurskoye field accounts for 50%.
Severneftegazprom holds the licence for hydrocarbons exploration, development and production in the Yuzhno-Russkoye oil and gas field located in the Krasnoselkupsky District of the Yamal-Nenets Autonomous Okrug. ABC1+C2 natural gas reserves of the field exceed 1 TCM. In August 2009 the Yuzhno-Russkoye field reached its design capacity of 25 BCM per annum, one year ahead of schedule.
Severneftegazprom has the following shareholding structure: Gazprom (holds the majority stake), BASF and E.ON. The Turonian deposits constitute the second important gas reserves of the Yuzhno-Russkoye fieldas. Their exploration is mainly complicated by working at the temperatures close to sub-zero. The Turonian deposits in the Yuzhno-Russkoye field are estimated at over 300 BCM.