Occidental Petroleum 2009 Annual Report Download - page 79
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Gas Reserves
proved developed and undeveloped reserves
Balance at December 31, 2006
Balance at December 31, 2007
Balance at December 31, 2008 3,1532121,2364,601
(688)(40)281(447)
1372611174
3622—364
67—736803
————
(232)(17)(89)(338)
Balance at December 31, 2009 2,7991832,1755,157
proved developed reserves
December 31, 2009 (b) 1,9311251,7593,815
proved undeveloped reserves
December 31, 2009 (c) 868584161,342