碎屑岩低阻油层成因及识别方法

Origins and identification methods of low resistivity reservoir in clastic rock

白 薷 李继红

西北大学地质学系，陕西 西安 710069

Department of Geology, Northwest University, Xi’an 710069, China

阻油层由于其复杂的电性特征，致使利用常规测井信息解释难度较大。从低阻油层定义着手，总结了低阻油层沉积相带的分布规律。在此基础上，分别从地质和测井2个方面介绍了低阻油层的形成机理及测井识别方法，进而分析了可动水分析、核磁共振、自然电位差3种测井识别方法，并将它们应用于不同地区低阻油层的测井解释，取得了较好的效果。

The complex electrical characteristics of low resistivity reservoir make the well logging interpretation difficult by conventional well logging information. This paper sums up the distribution rules of sedimentary facies belt in low resistivity reservoir from the definition of low resistivity reservoir. Then the paper introduces the forming mechanisms and identifying methods of low resistivity reservoir separately from the respects of geology and logging. Three logging identifying methods of movable water analysis, nuclear magnetic resonance and self-potential difference are discussed. These methods have been applied to the logging interpretation of
low resistivity reservoir in different areas and good results have been acquired.