致密气储量经济评价研究——以Y气田须家河组三段气藏为例

Study on Economic Evaluation of Tight Gas Reserves——A Case Study of Gas Reservoirs of Third Member of Xujiahe Formation in Gasfield Y

四川盆地须家河组致密气资源丰富,由于技术工程及经济条件的限制,目前开发难度较大,需合理开展储量经济性评价,探索影响致密气商业开发的因素。本文在调研国内致密气开发实践的基础上,分析了致密气经济评价方法,确定了致密气经济评价步骤。以Y气田须三段致密气为例,编制开发概念设计,基于盈亏平衡分析,采用现金流法,运用中国石化储量评估软件R3开展运算,计算出经济可采储量和财务指标。对Y气田须三段致密砂岩气藏加大关键技术的低成本化和大规模广泛应用,是致密气储量开发动用的有力保证。Y气田须三段钙屑砂岩气是一种特殊的致密气,加强致密气藏地质与工程联合攻关,提高单井产量和开发效果,是实现商业开发的重要前提。Y气田企业应采取开放合作模式,形成国际合作、国内合作、自主经营、风险服务的开发模式,实现优势互补,减少投资风险。

The Xujiahe Formation in Sichuan Basin is rich in tight gas resources.Due to the limitations of technical engineering and economic conditions,it is difficult to develop the tight gas at present,so it is necessary to carry out reasonable economic reserve evaluation and explore the factors affecting commercial development of the tight gas.On the basis of investigating the practice of tight gas development in China,this paper analyzes the method of economic evaluation and determines its steps for the tight gas.The tight gas in the third number of Xujiahe Formation in Gasfield Y is studied as a case,and the development concept was designed.Based on the break-even analysis,the cash flow method was adopted,and the reserves evaluation software R3 of SINOPEC was used to calculate the economic recoverable reserves and financial indexes.It is a strong guarantee for the producing of tight gas reserves to widen extensive application of key technologies with low cost for the tight sandstone gas reservoirs in the third number of Xujiahe Formation in Gasfield Y.The calcarenaceous sandstone gas in the third number of Xujiahe Formation in Gasfield Y is a special tight gas.It is an important prerequisite for commercial development to give more comprehensive researches on geology and engineering of the tight gas reservoir,and improve the production and development effect of single well.The enterprises in Gasfield Y should adopt open cooperation mode,and form a development mode characterized as international cooperation,domestic cooperation,independent management and risk service,so as to realize complementary resource advantages and reduce investment risks.