摘要
本文用影响椭圆的概念和平均值方法,给出了双孔隙介质有限导流垂直裂缝井中,幂律非牛顿流体瞬时压力近似计算公式,其压力诊断曲线可分为:早期的双线性流阶段,即无因次压力与无因次时间的1/4次方成正比的阶段;中期的过渡平缓阶段;以及晚期的拟径向流阶段,即压力与时间的(1-n)/(3-n)次方成正比的阶段,近似解的特殊情况与已有的结果是一致的,因而给矿场试井分析提供了一个更全面、实用的计算方法。
This paper presents the approximate analytical salutions of transient pressure of non-Newtonian power-law fluid in a vertically fractured well. The results of a special case of our approximation solutions and these obtained by using published numerical simulation techniques are in good agreement. The log-log diagnosis graph of the pressure may be divided into early bi-linear flow stage i.e. the dimensionless well pressure difference pw is proportional to dimensionless time, t_D1/4, interporosity-flow stage and late pseudo-radial flow stage i.e. pw proportional to t_D^(1-n)/(3-n). The structure and meaning of the approximate formulas for vertically fractured well in reservoir with double porosity is simple and obvious.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1990年第4期61-67,共7页
Acta Petrolei Sinica
