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川东北飞仙关组高含硫气藏气井在完井测试过程中，压力测点位置与产层中部的距离较大，需将压力数据用气柱压力计算公式折算后再进行试井分析解释。文章以质量、动量和能量三大守恒方程和状态方程为基础，考虑了流动气柱的动能损失以及井筒和地层中复杂的传热机理，推导出计算单相气流在井筒不同部位压力和温度的方法。以坡2井为例，应用目前最新的模块化动态地层测试器MDT地层测试技术，对折算的压力进行了验证和对比分析。结果表明，应用文中的压力计算方法，完全可以满足解释的压力数据精度。另外，在没有进行完井测试前利用MDT测压资料确定地层压力等储层参数是较为直接和可靠的方法。同时此法对川东北飞仙关组高含硫气藏的开发动态监测以控制元素硫在井底和井筒的沉积具有十分重要的指导意义。

Pressure Calculating Method and MDT Analysis of Gas Wells in High Sulphur Bearing Gas Reservoirs of Feixianguan Group,Northeast Sichuan

In well completing test for gas wells of Feixianguan Group with high sulphur content,the well test interpretation can't be conducted until the pressure data are calculated with gas column calculating formula because the distance between the pressure testing point and the central part of the formation is too big.Based on the quality,momentum,and energy conservation laws and the state equation,considering the momentum loss of gas column flowing and the complicated thermal conduction mechanism in the bore hole and formation,the pressure and temperature calculating method is derived for single phase gas flow in different positions of the bore hole.Taking Well Po 2 as an example,with MDT technology,the calculated pressures are verified and analyzed.The results indicate that applying the pressure calculating method provided by the paper,the accuracy of the pressure data can be reached completely.With MDT pressure data,the reservoir parameters,such as formation pressure,etc.,can be determined directly and reliable before well completing test.The method can be alao used for production performance monitoring of Feixianguan soar gas reservoir to control elemental sulphur depositing in bottom hole and bore hole.So,the method is very useful.