低渗凝析气藏气井产能测试制度优化方法

An optimization method for productivity testing regimes of gas wells in low-permeability condensate gas reservoirs

低渗凝析气藏气井进行产能测试时,利用二项式回归求取产能方程和无阻流量,常出现二项式产能方程异常的情况。通过对低渗凝析气藏气井测试期间生产动态的分析,确定导致产能方程计算异常的影响因素主要包括:平均地层压力误差、凝析油析出、测试制度不合理等;基于测试井的生产气油比、井口压力,确定凝析气井的最小测试制度和最大测试制度阈值,辅助设置测试产量的合理区间,形成产能测试制度选取的指导流程和方法。通过井场实例验证了方法的正确性。为低渗凝析气藏气井的产能测试提供了一种制度优化方法。

During productivity testing of gas wells in low-permeability condensate gas reservoirs,the application of binomial regression to derive productivity equations and absolute open flow often results in anomalies in the binomial productivity equations.By analyzing the production dynamics during testing of gas wells in low-permeability condensate gas reservoirs,it was determined that the primary factors causing calculation anomalies in the productivity equations include errors in average reservoir pressure,precipitation of condensate oil,and unreasonable testing regimes.Based on the gas-oil ratio and wellhead pressure of the tested wells,the minimum and maximum thresholds for the testing regimes of condensate gas wells were determined,aiding in setting a reasonable range for testing production.This led to the development of a guided process and methodology for selecting productivity testing regimes.This method has been validated with field examples,and it provides an optimization method for productivity testing regimes of gas wells in low-permeability condensate gas reservoirs.