BP 2005 Annual Report Download - page 138

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136 Making energy more
Supplementary information on oil and natural gas quantities continued
Movements in estimated net proved reserves on an SEC basis continued 2005
NATURAL GASabillion cubic feet
Rest of Rest of Asia
UK Europe USA Americas Pacific Africa Russia Other Total
SUBSIDIARY
At 1 January 2005
Developed 2,498 248 10,811 4,101 1,624 1,015 – 282 20,579
Undeveloped 1,183 1,254 3,270 10,663 5,419 1,886 – 1,396 25,071
3,681 1,502 14,081 14,764 7,043 2,901 – 1,678 45,650
Changes attributable to
Revisions of previous estimates (102) 11 447 104 (133) 152 – 15 494
Purchases of reserves-in-place – – 66 2 – – – – 68
Extensions, discoveries and
other additions 21 19 47 225 204 44 – – 560
Improved recovery 111 19 1,773 87 – – – 10 2,000
Productionb(425) (44) (1,018) (888) (280) (163) – (80) (2,898)
Sales of reserves-in-place – (1,182) (14) (230) – – – – (1,426)
(395) (1,177) 1,301 (700) (209) 33 – (55) (1,202)
AT 31 DECEMBER 2005c
Developed 2,382 245 11,184 3,560 1,459 934 – 281 20,045
Undeveloped 904 80 4,198 10,504 5,375 2,000 – 1,342 24,403
3,286 325 15,382 14,064 6,834 2,934 – 1,623 44,448
EQUITY-ACCOUNTED ENTITIES
(BP SHARE)
At 1 January 2005
Developed – – – 1,397 107 – 214 60 1,778
Undeveloped – – – 977 69 – 10 23 1,079
– – – 2,374 176 – 224 83 2,857
Changes attributable to
Revisions of previous estimates – – – 26 (81) – 1,337 102 1,384
Purchases of reserves-in-place – – – – – – – – –
Extensions, discoveries and
other additions – – – 28 – – – – 28
Improved recovery – – – 66 – – – – 66
Productionb– – – (154) (19) – (184) (3) (360)
Sales of reserves-in-place – – – – – – (119) – (119)
– – – (34) (100) – 1,034 99 999
AT 31 DECEMBER 2005d
Developed – – – 1,492 50 – 1,089 130 2,761
Undeveloped – – – 848 26 – 169 52 1,095
– – – 2,340 76 – 1,258 182 3,856
aNet proved reserves of natural gas exclude production royalties due to others, whether royalty is payable in cash or in kind.
bIncludes 174 billion cubic feet of natural gas consumed in operations (147 bcf in subsidiaries, 27 bcf in equity-accounted entities).
cIncludes 3,812 billion cubic feet of natural gas in respect of the 30% minority interest in BP Trinidad and Tobago LLC.
dIncludes 57 billion cubic feet of natural gas in respect of the 4.47% minority interest in TNK-BP.