压降曲线和压力恢复曲线测试资料的应用与对比

Application of Well Westing Data of Drawdown Curve and Build-up Curve and Its Comparison

油井和气井的压力不稳定测试,包括压降曲线测试和压力恢复测试。对于一口新井,确定原始地层压力、有效渗透率、总表皮系数、附加压力损失和流动效率,是试井的重要任务。上述参数的确定,可以使用压力恢复曲线,但也可以使用压降曲线。从理论上讲,两种曲线计算的各项参数应当是相同的。本文利用一个在油井上综合测试压降曲线和压力恢复的实例,使用压降曲线和压力恢复曲线两种方法,计算原始地层压力、有效渗透率、总表皮系数、附加压力损失和流动效率数值,基本上是相同。

Unsteady testing for oil and gas well includes testing of drawdown curve and build-up curve. For a new well, it is an important work to determine initial reservoir pressure, effective permeability, summary skin coefficient, supplementary pressure loss and flow efficiency. It is not only by build-up curve to get them, but also by drawdown curve to do. Theoretically, every parameter from both ways is same. Taking one of field examples of oil well integration testing drawdown curve and pressure recovery and using two kinds of interpreting methods, the calculated values of initial reservoir pressure, effective permeability, summary skin coefficient, supplementary pressure loss and flow efficiency are same basically.