BP Annual Report and Form 20-F 2011 - Company Reporting

Supplementary information on oil and natural gas (unaudited)Movements in estimated net proved reserves continuedmillion barrelsBitumen a 2010Rest ofNorthAmericaTotalEquity-accounted entities (BP share)At 1 January 2010Developed – –Undeveloped – –– –Changes attributable toRevisions of previous estimates – –Improved recovery – –Purchases of reserves-in-place – –Discoveries and extensions 179 179Production – –Sales of reserves-in-place – –179 179At 31 December 2010Developed – –Undeveloped 179 179179 179aProved reserves exclude royalties due to others, whether payable in cash or in kind, where the royalty owner has a direct interest in the underlying production and the option and ability to make lifting andsales arrangements independently.272 BP Annual Report and Form 20-F 2011