均质地层变井储试井分析

Well-Test Analysis with Changing Wellbore Storage in Homogeneous Reservoir

高油气比油井、低渗气藏大范围内压力恢复时变井储效应将对井底压力动态产生影响，直接用数值方法对Peter变井储时试井分析数学模型进行求解，并系统分析了各参数对变井储时压力动态的影响及变井储时压力导数曲线特征。针对我国油田早期注水开发和存在小断块等特点，进一步研究了存在恒压外边界和不渗透外边界影响时变井储数学模型和压力动态。

In the high gas-oil ratio wells or a low permeability gas reservoir,changing wellbore storage will affect the bottom-hole pressure behavior during pressure build-up over a large pressure range.In this paper,the Peter's mathematical model is solved by numerical method,and the effect of all parameters on pressure behavior and the characteristics of pressure derivation with changing wellbore storage are analysed. Because Chinese fields are often mathematical model and pressure behavior with changing wellbore storage in a reservoir which have a constant pressure or impermeable out boundary.