复合油藏试井的半对数分析法

Semilogarithmic Analysis Applicable to Pressure Transient Testing for Wells Producing from a Composite Reservoir

针对在试井分析中经常遇到的储层径向不连续性情况，考虑带有井筒储存效应的径向复合油藏渗流问题，研究了压降曲线分别在早、中、晚期的反应特征，用半对数分析方法导出复合区半径较大时远井区半径的计算公式。

In view of radial discontinuities of a reservoir encountered commonly in well testing and considering flowing characteristics in a composite reservoir with ewllbore storage effects, the behaviors of pressure drawdown cures in early, middle and late stages are discussed respectively,showing the dimensioness pressure in middle stage having a slop different from in early stage.A solving for the radius of the composite zone formula is derived when the radius of the composite zone is big.