本文利用注水驱模型数值模拟方法研究了岩电—相驱过程中岩石电阻率的变化规律。研究结果表明 ,水淹过程中岩石电阻率与含水饱和度之间的关系曲线基本上为“S”型 ,目前国内外常见的“U”型曲线仅是“S”型曲线的一种特例。本文通过数值模拟计算了油藏储渗性质和注入水电阻率对曲线形态的影响 ,为正确评价储层水淹规律和进行剩余油饱和度的解释提供了较为可靠的理论依据 In this paper, the variation law of rock resistivity in the process of rock-electric-phase-drive is studied by the numerical simulation of flooding-flooding model. The results show that the relationship curve between rock resistivity and water saturation is basically “S” during the process of flooding. At present, the common “U” curve at home and abroad is only a special case of “S” curve. In this paper, numerical simulation has been carried out to calculate the effect of reservoir bed permeability and injected water resistivity on curve shape, which provides a reliable theoretical basis for correct evaluation of reservoir waterflooding rules and interpretation of remaining oil saturation