论文部分内容阅读
本文介绍一种气井井底压力计算的新方法。通过实验数据作图分析,发现在一定的压力(或对比压力 p_r)和温度(或对比温度 T_r)范围内(zT_r)/(p_r)=1/(A+Bp_r),这样根据气体流动的能量方程,可得到静气柱和动气柱时的井底压力计算公式。运用此式可不用依次渐近法,不查压缩系数,从而简化了计算。用相当数量的实际资料验算,其结果与数值积分法和依次渐近法相当接近。
This article describes a new method for calculating bottom hole pressure in gas wells. Through the experimental data plotting analysis, we found that (zT_r) / (p_r) = 1 / (A + Bp_r) within a certain pressure (or contrast pressure p_r) and temperature (or contrast temperature T_r) Equation, the bottom hole pressure can be calculated when the static column and the dynamic column. The use of this formula can not be followed by asymptotic method, do not check the compression factor, thus simplifying the calculation. With a considerable amount of actual data checking, the result is quite close to the numerical integral method and the asymptotic method.