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 barrels of oil equivalentEurope US eTotal hydrocrabons a 2009EuropeNorthSouth Africa Asia Australasia TotalAmericaAmericaUKAmericaRussia AsiaRest ofRest ofNorthRest ofSubsidiariesAt 1 January 2009Developed 724 91 3,279 126 617 645 – 385 382 6,249Undeveloped 219 264 2,217 81 1,337 734 – 714 747 6,313943 355 5,496 207 1,954 1,379 – 1,099 1,129 12,562Changes attributable toRevisions of previous estimates (13) (2) 260 9 74 (74) – (168) 7 93Improved recovery 48 7 177 1 63 40 – 45 15 396Purchases of reserves-in-place 28 – – – – – – 6 – 34Discoveries and extensions 210 – 158 17 18 124 – – 98 625Production b f (102) (16) (393) (20) (182) (152) – (86) (44) (995)Sales of reserves-in-place (28) – (1) – – – – (65) – (94)143 (11) 201 7 (27) (62) – (268) 76 59At 31 December 2009 cDeveloped 680 91 3,514 135 596 613 – 455 612 6,696Undeveloped 406 253 2,183 79 1,331 704 – 376 593 5,9251,086 344 5,697 214 1,927 1,317 – 831 1,205 12,621Equity-accounted entities (BP share) gAt 1 January 2009Developed – – – – 658 – 2,495 529 – 3,682Undeveloped – – – – 586 42 1,057 218 – 1,903– – – – 1,244 42 3,552 747 – 5,585Changes attributable toRevisions of previous estimates – – – – (2) (5) 625 (32) – 586Improved recovery – – – – 104 – 8 1 – 113Purchases of reserves-in-place – – – – – – – – – –Discoveries and extensions – – – – 4 – 92 – – 96Production b f – – – – (66) – (345) (75) – (486)Sales of reserves-in-place – – – – (81) – – (142) – (223)– – – – (41) (5) 380 (248) – 86At 31 December 2009 dDeveloped – – – – 623 – 2,645 377 – 3,645Undeveloped – – – – 580 37 1,287 122 – 2,026– – – – 1,203 37 3,932 499 – 5,671Total subsidiaries and equity-accounted entities (BP share)At 1 January 2009Developed 724 91 3,279 126 1,275 645 2,495 914 382 9,931Undeveloped 219 264 2,217 81 1,923 776 1,057 932 747 8,216943 355 5,496 207 3,198 1,421 3,552 1,846 1,129 18,147At 31 December 2009Developed 680 91 3,514 135 1,219 613 2,645 832 612 10,341Undeveloped 406 253 2,183 79 1,911 741 1,287 498 593 7,9511,086 344 5,697 214 3,130 1,354 3,932 1,330 1,205 18,292aProved 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.bExcludes NGLs from processing plants in which an interest is held of 26 thousand barrels of oil equivalent per day.cIncludes 819 million barrels of NGLs. Also includes 552 million barrels of oil equivalent in respect of the 30% minority interest in BP Trinidad and Tobago LLC.dIncludes 20 million barrels of NGLs. Also includes 266 million barrels of oil equivalent in respect of the minority interest in TNK-BP.eProved reserves in the Prudhoe Bay field in Alaska include an estimated 68 million barrels of oil equivalent upon which a net profits royalty will be payable.fIncludes 34 million barrels of oil equivalent of natural gas consumed in operations, 29 million barrels of oil equivalent in subsidiaries, 5 million barrels of oil equivalent in equity-accounted entities andexcludes 3 million barrels of oil equivalent of produced non-hydrocarbon components which meet regulatory requirements for sales.gVolumes of equity-accounted entities include volumes of equity-accounted investments of those entities.276 BP Annual Report and Form 20-F 2011