油层岩石弥散性及其实验研究

近年来弥散性已被验证为油层岩石的一种基本物理性质,并被认为是混溶驱替过程孔隙介质内两种混溶流体不稳定混合能力的一种度量。本文描述实验确定岩石弥散性的理论和方法;并根据实验结果讨论弥散性与渗透率、平均颗粒直径、毛管压力、Koval非均质系数等岩石物性参数以及与水驱油效率的相关性。

DISPERSIVITY OF OIL RESERVOIR ROCK AND ITS EXPERIMENTAL INVESTIGATION

Dispersivity has been recently identified as a basic physical property of oil reservoir rock, which can be taken as a measure of the ability of unstable mixing of tow miscible fluids in porous media during miscible flooding. In this paper the theory and method used for determining dispersivity experimentally are described. According to the experimental results the correlations of dispersivity with other characteristic parameters of rocks, such as permeability, average grain size, capillary pressure, Kovals heterogeneity factor etc, and those with the waterflooding efficiency are discussed.