A油田储层非均质性研究

针对目前国内外已投入开发的大量油田都己经进入中高含水期和产量递减阶段，大量可动原油采不出来的问题，运用统计学方法和洛伦茨曲线法研究了A油田的储层平面非均质性、层间非均质性和层内非均质性，得出A油田存在较严重的平面非均质性和层间非均质性，具有中等程度的层内非均质性。比较了两种方法的优缺点，认为洛伦茨曲线法比统计学方法更实用，更直观，操作更简便，并且能定量地研究储层非均质程度。

STUDY ON THE RESERVOIR HETEROGENEITY IN OILFIED A

Nowadays，most oilfields in the world have come into their mature stage with a middle or high water cut.In this stage，much moveable oil can not be exploited yet.So petroleum engineers expect the oil recovery can be improved by studying on the reservoir heterogeneity.The heterogeneity of oilfield A is studied in this paper by using statistics and Lorentz curve.The reservoir heterogeneity includes plane heterogeneity，internal heterogeneity in the target layers and the heterogeneity between target layers.Research indicates that the plane heterogeneity and the heterogeneity between target layers in oilfield A are both serious and the internal heterogeneity is moderate.This research also makes a contrast of these two methods，it is recognized that the method of Lorentz curve is easier to determine the degree of the reservoir heterogeneity than the method of statistics.And moreover，the method of Lorentz curve is a quantitative approach to study the reservoir heterogeneity.