The following is historical revenue and cost information relating to the Company's oil and gas operations located entirely in the United States:

与油气生产活动相关的资本化成本

石油和天然气资产收购和开发活动所产生的成本

生产活动的经营结果

The following schedule sets forth the revenues and expenses related to the production and sale of oil and gas. The income tax expense is calculated by applying the current statutory tax rates to the revenues after deducting costs, 包括折旧, 损耗和摊销备付金, 在产生了永久的差异之后. The results of operations exclude general office overhead and interest expense attributable to oil and gas production.

石油和天然气储量（未经审计）

The following table presents estimated volumes of proved developed and undeveloped oil and gas reserves as of 12月ember 31, 2011, 2010年和2009年以及过去三年探明储量的变化. The reserve reports use an average price equal to the unweighted arithmetic average of hydrocarbon prices received on a field-by-field basis on the first day of each month within the 12-month period ended 12月ember 31, 2011, 2010年和2009年, in accordance with revised guidelines of the SEC applicable to reserves estimates as of year-end 2009. Volumes for oil are stated in thousands of barrels (MBbls) and volumes for gas are stated in millions of cubic feet (MMcf). 2011年储备报告使用的价格为美元96.19 每桶和美元4.12 每MMbtu, 根据运输费用和地区价格差异调整, 还有石油和天然气储备, 分别. 2010年12月31日和2009年12月31日用于储备报告的价格为$76.16 每桶和美元4.38 每百万英热单位和$57.90 每桶和美元3.87 每百万英热单位.

格尔夫波特强调，下面所示的储量新葡京是估计的, 就其本质而言, 新葡京是可以修改的. 这些估计新葡京是利用所有可用的地质和储层新葡京作出的, 以及生产性能新葡京. 每年审查和修订这些估计数, 向上或向下, 根据额外的性能新葡京.

The Company experienced downward reserve revisions in estimated proved reserves in 2011. These downward revisions were primarily the result of the drilling of PUDs during the Company's 2011 drilling program and ethane takeaway issues in the Permian Basin. The Company experienced downward reserve revisions in estimated proved reserves in 2010. These downward revisions were primarily the result of the five-year schedule for proved undeveloped reserves from the SEC's "Modernization of 石油 and 气体 Reporting" Final Rule. 2009年，该公司对估计探明储量进行了向下的储量修正. These downward revisions were primarily the result of implementing the five-year schedule for proved undeveloped reserves from the SEC's "Modernization of 石油 and 气体 Reporting" Final Rule.

贴现后的未来净现金流量（未经审计）

下表列出了预计的未来现金流量, 其中的变化, 截至12月31日，格尔夫波特已探明的石油和天然气储量, 2011, 2010年和2009年 using an unweighted average first-of-the-month price for the period January through 12月ember for 2011, 2010年和2009年.

Standardized Measure of Discounted Future Net Cash Flows Relating to Proved 石油和天然气储量（未经审计）

In order to develop its proved undeveloped reserves according to the drilling schedule used by the engineers in Gulfport's reserve report, 公司将需要花费$52,855,000, $49,897,000 和$55,364,000 分别在2012年、2013年和2014年.

Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved 石油和天然气储量（未经审计）