根据第13和15(d)条提交的年度报告

石油和天然气勘探和生产活动补充信息 (Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves) (Details)

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石油和天然气勘探和生产活动补充信息 (Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves) (Details) (USD $)
12个月结束
12月. 31, 2011
12月. 31, 2010
12月. 31, 2009
石油和天然气勘探和生产活动补充信息 [Abstract]      
未来现金流量 $ 1,594,050,000 $ 1,479,295,000 $ 1,005,029,000
未来开发和废弃成本 (306,810,000) (301,651,000) (209,975,000)
未来生产成本 (295,383,000) (305,814,000) (236,003,000)
未来生产税 (124,739,000) (136,323,000) (97,841,000)
未来所得税 (229,649,000) (159,171,000) (50,229,000)
未来净现金流量 637,469,000 576,336,000 410,981,000
10%的折扣以反映现金流的时间 (260,788,000) (260,849,000) (170,207,000)
未来净现金流量折现的标准化度量 $ 376,681,000 $ 315,487,000 $ 240,774,000