【摘要】 通常用井底压力和时间的半对数曲线来分析压降数据。直接合成法是一种不稳定压力分析技术,它是用压力和压力导数与时间的双对数曲线来分析。因此,可以直接根据不同的直线段分析不同的流动区间。直接分析法在早期测试数据丢失的情况下显得非常有效。Tiab等人的直接合成技术在国际上是一种比较新的处理注水井压降数据的方法,它用多个方程去模拟计算地层参数,比如渗透率、井筒储存系数和表皮因子。总结介绍了这种方法,并应用于国内油田,结果得到了验证。更多还原

【Abstract】 Conventionally, pressure fall-off test data is analyzed using semilog plot of bottomhole pressure versus time. Direct synthesis is a transient pressure analysis technique, which uses log-log plot of pressure and pressure derivative vs. time. Thus, different straight line portions indicating different flow regions are directly analyzed. Direct synthesis is very useful in condition of pressure test data missing. Tiab’ s direct synthesis is a new method to deal with pressure fall-off data, and it uses more than one equation for the estimation of reservoir parameters such as permeability, wellbore storage coefficient and skin factor. The author summarizes and introduces this method and put it into application, which is verified to beeffective.更多还原