Abstract: This paper gives a detailed sfudy of the faetars affecting sweep efficiency of the sand core by means of theoretical analysis and labaratary studies. The results show that the capillary number is one of the primaxy factors affecting sweep efficiency.A group of relative permeability curves as a function of saturation and capillary number were given from experimental investigation. So that Buckley-Leverett theory of two-phase flow in porous media was developed and the experimental foundation for the physicochemical-grecolatical theory and numerical simulation in tertiary oil reccvcry was provided.

摘要： 本文运用理论分析和室内实验相结合的方法,对天然岩心驱油效率的影响因素进行了深入的研究,提出毛管数是影响驱油效率的主要因素之一。实验研究给出了作为饱和度和毛管数的二元函数的一族相对渗透率曲线,使得贝克菜-列弗莱特的二相渗流理论得以扩展,并为三次采油物理-化学渗流理论和数值模拟研究提供了实验基础。