深层气井地层压力折算方法分析及应用

Analysis and Application of Formation Pressure Reducing Method in Deep Gas Well

针对有些深层气井压力计未下在气层中部,记录的压力与实际地层压力之间存在误差的问题,开展了深层气井压力折算方法分析,采用积分迭代方法对2000年以来压力计未下在气层中部的深层气井资料进行了压力折算。为了验证理论计算结果的准确性,利用深层气井试井过程中记录的井口油压数据,折算出压力计深度处的压力,与压力计实测压力进行了对比分析,确定了该方法的适用范围,并对理论计算压力和实测压力对比符合较好的深层气井进行了气层中部静压折算,从而为深层气井储量计算和开发评价提供了可靠依据。

Aiming at the problem that pressure gauge of deep gas wells is not put in the middle part of gas reservoirs and recorded pressure has error with real formation pressure,this paper performs analysis on pressure reducing method for deep gas wells.It uses integral iteration method to reduce pressure for deep gas well data without pressure gauge put into middle part of gas reservoirs since 2000.In order to verify accuracy of theoretical calculation, it uses well head oil pressure data which is recorded in the process of deep gas well testing to reduce the pressure in the depth of pressure gauge,and compares the real pressure measured by pressure gauge,determines the application range of this method,and reduces static pressure in the middle part of gas reservoirs for deep gas wells which has better conformity between calculated pressure and measure pressure.