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气井稳定试井解释的原理和解释方法要求必须在测试工艺上满足稳定的测试条件，而在实际产能测试中，由于各种原因的影响，导致测试的产量和井底压力并未稳定就录取资料，此时所测出的稳定试井资料在二项式产能分析曲线上表现为斜率为负值，这种产能测试资料无法分析应用，特别是低渗透气藏，由于产能测试所需的稳定时间较长，必然造成测试成本较高。文章针对测试的产量或井底压力不稳定的情形，将其考虑为变产量稳定试井，从理论上推导出快速求取气井产能方程的新方法，并将该方法应用于分析实际产能测试资料，使原来无法解释的测试资料得到了解释，获得了气井的产能方程和无阻流量。实践证明，文章提出的气井产能分析新方法具有实用价值。

A New Way to Analyze Productivity of Gas Wells

The interpretation principal and method of steady well test of gas wells can′t be used unless the test meets the conditions of steady test. But in real cases, the testing data are acquired when the production and bottom hole pressure is not stable because of many reasons. The acquired data show that their slope is minus on the productivity analyzing curve of binomial. So the data can′t be used for productivity analysis. As for gas reservoirs with low permeability, it needs long time to reach the stable state, which will make the testing cost much; Aiming to the non stability of the tested production or bottom hole pressure, the article regards the situation as the steady well test with production variation. A new way is derived theoretically to get the productivity equation of gas wells raptly. The way is applied to analyze the real productivity testing data. In this way, the tested data that could not be interpreted in the past can be interpreted. And the productivity equation and open flow capacity of gas well is obtained. Practice proves that the new way of productivity analysis of gas wells proposed in the article is very useful.