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

Supplementary information on oil and natural gas (unaudited)Operational and statistical informationThe following tables present operational and statistical information related to production, drilling, productive wells and acreage. Figures include amountsattributable to assets held for sale.Crude oil and natural gas productionThe following table shows crude oil and natural gas production for the years ended 31 December 2011, 2010 and 2009.Europe NorthAmericaRest ofEuropeRest ofNorthAmericaSouthAmericaAfrica Asia Australasia TotalUKUSRussiaSubsidiariesCrude oil bthousand barrels per day2011 113 32 453 2 39 190 – 138 25 9922010 137 40 594 7 54 246 – 119 32 1,2292009 168 40 665 8 61 304 – 123 31 1,400Natural gas cmillion cubic feet per day2011 355 13 1,843 14 2,197 558 – 618 795 6,3932010 472 15 2,184 202 2,544 556 – 574 785 7,3322009 618 16 2,316 263 2,492 621 – 610 514 7,450Equity-accounted entities (BP share)Crude oil bthousand barrels per day2011 – – – – 90 – 865 210 – 1,1652010 – – – – 98 – 856 191 – 1,1452009 – – – – 101 – 840 194 – 1,135Natural gas cmillion cubic feet per day2011 – – – – 392 – 699 34 – 1,1252010 – – – – 399 – 640 30 – 1,0692009 – – – – 392 – 601 42 – 1,035aProduction excludes 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.bCrude oil includes natural gas liquids and condensate.cNatural gas production excludes gas consumed in operations.Productive oil and gas wells and acreageThe following tables show the number of gross and net productive oil and natural gas wells and total gross and net developed and undeveloped oil andnatural gas acreage in which the group and its equity-accounted entities had interests as at 31 December 2011. A ‘gross’ well or acre is one in which awhole or fractional working interest is owned, while the number of ‘net’ wells or acres is the sum of the whole or fractional working interests in gross wells oracres. Productive wells are producing wells and wells capable of production. Developed acreage is the acreage within the boundary of a field, on whichdevelopment wells have been drilled, which could produce the reserves; while undeveloped acres are those on which wells have not been drilled orcompleted to a point that would permit the production of commercial quantities, whether or not such acres contain proved reserves.Rest ofAsiaEuropeRest ofEuropeNorthAmericaRest ofNorthUS AmericaSouthAmericaAfrica Asia Australasia TotalUKRussiaNumber of productive wells at31 December 2011Oil wells a – gross 197 73 2,629 36 3,764 566 20,308 1,750 13 29,336– net 97 28 1,063 18 2,090 429 9,131 315 2 13,173Gas wells b – gross 273 – 24,986 376 467 122 72 589 68 26,953– net 137 – 12,863 185 152 47 36 219 14 13,653Oil and natural gas acreage at 31 December 2011Thousands of acresDeveloped – gross 334 65 7,350 228 1,718 560 1,618 1,952 162 13,987– net 182 21 4,266 111 450 207 723 384 35 6,379Undeveloped c – gross 1,276 186 7,210 6,273 10,064 27,000 33,704 56,189 18,641 160,543– net 764 79 4,798 4,253 4,571 17,895 14,712 17,890 13,452 78,414aIncludes approximately 3,866 gross (1,702 net) multiple completion wells (more than one formation producing into the same well bore).bIncludes approximately 2,683 gross (1,689 net) multiple completion wells. If one of the multiple completions in a well is an oil completion, the well is classified as an oil well.cUndeveloped acreage includes leases and concessions.Rest ofAsia280 BP Annual Report and Form 20-F 2011