储层环境岩石电阻率变化规律研究

STUDY ON THE RULE OF ROCK RESISTIVITY CHANGE IN RESERVOIR ENVIRONMENT

应用先进的模拟储层条件下岩石电阻率测试技术 ,利用保压密闭取心技术取得具有保持原始地层饱和状态的储层特征岩心 ,在储层环境下系统地研究了岩石电阻率与温度、压力、饱和度等参数之间的变化规律 ,同时对饱和原油及饱和水样品进行对比分析 ,从理论上探讨了不同流体饱和介质在岩石电阻率测试中所产生的影响。研究储层环境下岩石电阻率的变化规律 ,不仅可以对测井曲线进行标定 ,而且可以通过饱和原油样品电阻率测定来确定储层含油饱和度。此项研究首次把保压密闭取心技术获得的岩心应用到电阻率测试技术上 ,开辟了电阻率研究的新领域。

This paper uses an advanced rock resistivity test technique simulating reservoir environment and pressure maintaining sealed coring technique to obtain reservoir characteristic core maintaining original formation saturation status. It systematically studies the changing rule between rock resistivity and the parameters including temperature, pressure and saturation in reservoir environment. It analyzes comparatively saturated oil and saturated water sample. This study is the first application of the core obtained with pressure maintaining sealed coring technique in resistivity test technique.