 
International offshore partnership
Strategic cooperation agreements signed with ExxonMobil, Eni and Statoil. Agreements envisage exploration of Russian offshore zones and cooperation through technology sharing and joint international projects.
According to the results of an audit performed by DeGolyer & MacNaughton under the SEC life-of-field classification, Rosneft's proven hydrocarbon reserves as of December 31, 2011 stood at 17,618 million BOE. Of this total, oil reserves stood at 14,286 million barrels (1,960 million tons) and gas reserves at 19,995 billion cubic feet (566 billion cubic metres). These figures put Rosneft's reserve replacement ratio at 162%. The Company's gas reserves have grown 2.3 times compared to the level registered at the end of 2010.
In the first quarter of 2012 production at Vankor oil and gas field reached 3.968 million tonnes of oil (as of March 27, 2012), which is 218,000 tonnes (6%) more than targeted in the business plan. This also represents a 21% increase year-on-year (of 690,000 tonnes). Over 12.7 million tonnes of oil were produced at the field in 2010, a figure that increased to 15 million tonnes in 2011. In 2012 oil production is planned to reach 18.001 million tonnes.
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