截至2012年3月31日和2011年12月31日的长期债务明细如下：

截至2012年3月31日，长期债务到期日如下：

(1) On September 30, 2010, the Company entered into a $100.0 与加拿大新斯科舍省银行签订的百万高级担保循环信贷协议, 作为行政代理人、信用证开证人和主要安排人, and Amegy Bank National Association. The revolving credit facility initially matured on September 30, 2013 and had an initial borrowing base availability of $50.0 million, which was increased to $65.0 million effective December 24, 2010. 该信贷协议由公司几乎所有资产担保. 本公司的全资子公司担保本公司在信贷协议项下的义务.

On May 3, 2011, 公司与加拿大新斯科舍省银行签订了循环信贷协议的第一次修正案, Amegy Bank, Key Bank National Association ("Key Bank") and Société Générale. Pursuant to the terms of the first amendment, Key Bank and Société Générale were added as additional lenders, the maximum amount of the facility was increased to $350.0 million, the borrowing base was increased to $90.0 million, 公司根据信贷协议应支付的某些费用和费率减少, and the maturity date was extended until May 3, 2015. On October 31, 2011, 公司对其循环信贷额度进行了额外修订, among other things, the borrowing base under this facility was increased to $125.0 million. Effective May 2, 2012, 公司对其循环信贷额度进行了额外修订, among other things, the borrowing base was increased to $155.0 million and Credit Suisse, 德意志银行美洲信托公司（Deutsche Bank Trust Company Americas）和伊比利亚银行（Iberiabank）也被加入，因为有更多的贷款机构和社会集团（sociedastrege）离开了该银行集团. As of March 31, 2012, approximately $10,000,000 was outstanding under the credit agreement.

Advances under the credit agreement, as amended, may be in the form of either base rate loans or eurodollar loans. 基准利率贷款的利率等于(1)适用利率，其范围为 1.00% to 2.50%, plus (2) the highest of: (a) the federal funds rate plus 0.5%, (b)由代理人不时公开宣布为其“优惠利率”的当日有效利率,“(c)一个月以上的欧元利率 1.00%. 欧元美元贷款的利率等于(1)适用利率，其范围从 2.00% to 3.50%, 再加上(2)显示在路透Screen LIBOR01页面上的伦敦银行同业拆放利率.S. dollars, or, if such rate is not available, 显示英国银行家协会在美国存款的平均利率的其他页面或服务上提供的利率.S. dollars, or, if such rate is not available, 代理应查询的纽约三大货币中心银行的平均报价，作为美国存款的“伦敦银行同业拆放利率”.S. dollars. 截至2012年3月31日，根据信贷协议借入的款项按基准利率(4.25%).

信贷协议包含习惯性的负面契约，包括, but not limited to, restrictions on the Company's and its subsidiaries' ability to: incur indebtedness; grant liens; pay dividends and make other restricted payments; make investments; make fundamental changes; enter into swap contracts and forward sales contracts; dispose of assets; change the nature of their business; and enter into transactions with their affiliates. 负面契约受限于信贷协议中规定的某些例外情况. 信贷协议还包含某些肯定的盟约, including, but not limited to the following financial covenants: (1) the ratio of funded debt to EBITDAX (net income, 不包括与ASC 815产生的掉期合同相关的任何非现金收入或费用, 在确定净收入时，从收入中扣除且不重复的部分, (a)该期间的合并利息费用总额, (b) the aggregate amount of income, franchise, 该期间的资本或类似税费费用（从价税除外）, (c) all amounts attributable to depletion, depreciation, 该期间的摊销和资产或商誉减值或减记, (d) all other non-cash charges, (e) non-cash losses from minority investments, (f) actual cash distributions received from minority investments, (g) to the extent actually reimbursed by insurance, 与意外事故或业务中断责任有关的费用, (h)与资产处置和收购有关的所有合理交易费用, investments and debt and equity offering, 减去非现金收入（归属于少数股权投资的股权收入），12个月期间不得大于 2.00 to 1.00; and (2) the ratio of EBITDAX to interest expense for a twelve-month period may not be less than 3.00 to 1.00. 截至2012年3月31日，公司遵守了所有协议.

(2) In March 2011, 公司为其位于俄克拉荷马城的办公楼签订了一项新的建筑贷款协议, Oklahoma. The new loan agreement refinanced the $2.4 million outstanding under the previous building loan agreement. 新协议将建筑贷款的到期日延长至2016年2月，并将利率降至 5.82% per annum. 新楼宇贷款要求每月支付约$的利息和本金22,000 并以俄克拉荷马城办公楼和相关土地作为抵押.