姬塬地区延长组低阻油层成因分析及识别方法

Cause Analysis and Identification Methods of Low Resistivity Oil Layer of Yanchang Formation in Jiyuan Area

低阻油层在姬塬地区分布比较广泛,由于电阻率低,给测井解释带来一定的困难。从低阻油层的"四性"出发,分析了低阻油层的基本成因,并运用可动水分析法、交汇法、纵向饱和度对比法、径向饱和度比值法对低阻油层的识别进行了浅析,确立了研究区油水层识别的下限标准,通过生产实践,解释符合率达到了82.16%。

Low resistivity oil layer distributes widely in Jiyuan area. It is difficult to interpret for its low-resistivety. Based on its ＂four properties ＂which are lithology, physical property electric property and oiliness property, this paper analyzes the primary cause and gives an superficia analysis on the identification about it by movable water analysis method, convergence, vertical ＆ latera saturation contrasting method,and sets up a criterion on the identification minimum for it. Field application shows that it is reliable,whose interpret correlation can reach 82.16%.