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含水饱和度对岩石电阻率、饱和度指数以及地层因素有重要影响,这些参数是利用电测井资料评价含气饱和度的重要参数。测量储层不同含水饱和度岩石的电性,对于研究储层原始含气饱和度、气层分布和综合评价含气性具有重要意义。本文通过室内实验研究了不同岩性、渗透率的岩心在不同含水饱和度条件下岩心电阻率的变化,分析了岩心含水饱和度的变化对低渗岩石电阻率和饱和度指数以及地层因素的影响。
Water saturation has an important influence on resistivity, saturation index and stratigraphy of rock. These parameters are important parameters to evaluate gas saturation by using electrical logging data. Measuring the electrical properties of rocks with different water saturations is of great significance for studying the original gas saturation of gas reservoirs, the distribution of gas reservoirs and the comprehensive evaluation of gas content. In this paper, the variation of core resistivity of cores with different lithology and permeability under different water saturations was studied through laboratory experiments. The influence of core water saturation on resistivity and saturation index and formation factors of low permeability rock was analyzed. .