摘要
为准确确定泥质砂岩储层的原始含油饱和度,分析了四种原始含油饱和度模型:阿尔奇方程、改进印度尼西亚方程、改进Doll方程和有效介质对称电阻率模型。对比结果表明:改进印度尼西亚方程和改进Doll方程既考虑了泥质导电使岩石电阻率减小的因素,又考虑了泥质含量增大使孔隙结构复杂化,使电阻率增大的因素,计算结果优于阿尔奇方程。有效介质对称电阻率模型考虑了泥质和微孔隙水的连通性、形状、结构等对岩石导电性的影响,计算精度最高,具有较好的实用性。
In order to determine the initial oil saturation of shaly sandstone reservoir accurately, four kinds of models are analyzed:Archie equation, improved Indonesian equation, improved Doll equation and effective medium symmetric resistivity model. The result shows that the improved Indonesian equation and improved Doll equation are better than Archie equation because both of them take the factor of reducing rock resistivity caused by clay conduction into consideration and as well as the increasing shale content which makes pore structure complicated and resistivity grown. The effective media symmetric resistivity model has the highest computational accuracy because clay and connectivity of micropore water, shape and structure are taken into account. It is more practical.
出处
《国外测井技术》
2013年第5期8-11,3,共4页
World Well Logging Technology
