【摘要】 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。更多还原

【Abstract】 This paper disccussed some problems (such as the problems in measuring the permeability and the porosity) which often come out in the conventional core analysis for the low permeability and low porosity core and the factors which affect the results in lab. test. Experiments with the formation cores show that the confining pressure have a large influence on the measurement of permeability—the permeability becomes lower as the confining pressure increases. The salt concentration in the formation water has an influence on the measured permeability to some extent and essentially has no effect on porosity measured in lab. test. As for the method of determination of porosily by fluid saturation technique, the procedure of saturation has a large effect on the results of porosity measured.更多还原