BP 2012 Annual Report Download - page 278
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Movements in estimated net proved reserves continued
million barrels
Bitumena2011
Rest of
North
America Total
Equity-accounted entities (BP share)
At 1 January 2011
Developed ––
Undeveloped 179 179
179 179
Changes attributable to
Revisions of previous estimates (1) (1)
Improved recovery ––
Purchases of reserves-in-place ––
Discoveries and extensions ––
Production ––
Sales of reserves-in-place ––
(1) (1)
At 31 December 2011
Developed ––
Undeveloped 178 178
178 178
aProved 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
and sales arrangements independently.
276 Supplementary information on oil and natural gas (unaudited)
BP Annual Report and Form 20-F 2012