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我国长期实行计划经济体制，气藏开采的经济性往往被忽略，采收率主要反映了技术可采性。在目前市场经济条件下，油气生产企业最关心的是气藏开发能够获得最大经济效益的采收率（即经济采收率）。因此，研究气藏经济采收率，应用于气藏开发可行性论证，指导气藏科学开发，为油气生产企业决策者提供依据。文章采用经济极限产量法和现金流量法研究气藏经济采收率，从经济评价角度研究气藏采收率，使采收率不仅反映了技术的可采性，而且反映了经济的可采性。

Methods of Determining Gas Reservoir Economic Recovery

Because planned economy has been carried out in China for a long time,the economic performance of gas reservoir development has been always neglected and the recovery is mainly dependent on technological conditions of production.Under the conditions of market economy at present,the oil and gas production enterprises are most concerned about how to get a recovery with maximum economic returns,i.e.economical recovery,in gas reservoir development.Therefore,through studying gas reservoir economical recovery and applying it to the feasibility demonstration of gas reservoir development,the gas reservoir may be scientifically developed,which is very important to the policy-makers of the oil and gas production enterprises.In the paper,it is pointed out that the gas reservoir economical recovery is studied by use of both economically limiting production method and cash flow method and the gas reservoir recovery is also studied from the viewpoint of economic evaluation,thus making the recovery reflecting not only the technological conditions of production but also the economic performance of production.