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本文介绍了常规岩心分析中经常遇到的低孔低渗透岩心的诸如孔隙度、渗透率等测定中的几个问题,及其对实验室内测定结果的影响因素。储层岩心试验表明,围压对气体渗透率的测定有较大影响,岩石渗透率随围压的增加而减小;地层水中含有不同浓度的盐,对实验室内渗透率的测定也有不同程度的影响,而对岩石孔隙度的测定基本没有影响;用饱和液体法确定岩石孔隙度,其饱和程序对孔隙度的测定结果有较大影响。
This paper introduces some problems in the determination of low porosity and low permeability cores, such as porosity and permeability, which are commonly encountered in conventional core analysis and their influencing factors on the determination result in laboratory. The reservoir core tests show that the confining pressure has a great influence on the determination of gas permeability, and the permeability of rock decreases with the increase of confining pressure. The formation water contains different concentrations of salt, and the permeability of the laboratory is also measured to varying degrees , But has no effect on the determination of rock porosity. The determination of rock porosity by the saturated liquid method has a significant effect on the determination of porosity.