用不稳定测试资料确定均质气藏气井产能

以多产量下均质气藏不稳定压降方程通式为基础 ,提出了不稳定产能方程和全新的产能分析方法 .为了保证各产量段分析结果的一致性和可靠性 ,建立了均质气藏不稳定产能方程的最优化数学模型 .从测试的角度来说明该方法不需要关井恢复压力 ,产能分析结果受地层压力的精确程度影响较小 .对长庆气田实际资料的处理表明 ,运用该方法能有效地处理实际资料 ,提高测试资料的利用率 ;进行产能测试设计 ,可以显著地节省测试成本 ,提高气田经济效益

Determining the productivity of a gas well in homogeneous reservoir using transient pressure well testing data

A new method is proposed to get transient no resistance flow rate of a gas well in homogeneous reservoir by using transient pressure well testing data. Based on the general transient pressure drawdown equation of homogenous gas reservoir, the transient pressure productivity equation and a brand new productivity analysis method are presented. And then an optimal mathematical model of transient pressure productivity equation of homogeneous gas reservoir is built in order to make sure the consistency between the result analyzed according to the flow rate variation of each production stages and final actual result. From the point of view on the well testing technologies, the method does not need to build up pressure in testing and the effect of formation pressure on the accuracy of productivity equation is little. Dealing with the real data of Changqing gas field shows that using the method can efficiently deal with real testing data and increases the utilization efficiency of real data, so well testing cost can be saved.