几种常用原始含油饱和度测井解释模型对比分析

The Comparation and Analysis of Several Usual Original Oil Saturation Well Logging Interpretation Model

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 original oil saturation of clayey sand reservoir, four original saturation model was analysed,including Archie's equation, improved Indonesia equation, improved Doll equation, effective medium symmetric resistivity model.The result of comparation showed that the improved Indonesia equation and the improved Doll equation was better than Archie's equation for the influence of clay was considered, which both reduce the resistivity for the conductivity of clay, and increase the resistivity for the complexity of the pore structure. The effective medium symmetric resistivity model was the most accurate and very practical, for the connectivity, shape, structure of clay and micropore water was considered.