确定长庆气田中高回压下天然气井绝对无阻流量的方法研究

A Study of Method to Confirm the Unresisting Flow Rate Under the High Pressure Condition

经对长庆气田气井无阻流量计算存在误差的原因分析 ,对原有“一点法”的计算公式进行了修正、补充。完善后的“一点法”公式适用于回压范围为 6 0 %～ 90 %的井 ;同时 ,对高回压下气井无阻流量的确定进行了深入的研究 ,提出了应用数学方法确定高回压下气井无阻流量的方法。经现场应用取得了满意的效果 ,误差不超过 10 %。

After the analysis on the error existed in the calculation to unresisting flow rate of gas well in Changqing oilfield, the original 'one point' method is corrected. The complete formula is applicable to the wells which circle pressure ranges from 60 percent to 90 percent, meanwhile, the determine method to high circle pressure unresisting flow rate is deeply studied, and its mathematic method is represented. Owing to its error is less than 10 percent, so it had achieved a satisfactory effect to local application.