淡水驱替过程中岩石电性实验研究  

Experimental study on rock electricity in the course of fresh water flooding

作　　者：俞军[1,2] 王伟男[2] 耿昕[2] 杨芳[2] 

机构地区：[1]中国地质大学地球物理与信息技术学院,北京100083 [2]大庆石油管理局测井公司,黑龙江大庆1063412

出　　处：《大庆石油地质与开发》2008年第6期140-142,共3页Petroleum Geology & Oilfield Development in Daqing

摘　　要：润湿性是影响储层岩石电阻率的重要因素。实验研究了不同润湿性的岩心淡水驱替过程中岩石电阻率随含水饱和度的变化规律,揭示了油层水淹后不同润湿性岩石的导电机理。实验结果显示水润湿岩心淡水驱替后,随含水饱和度变化电阻率变化曲线呈"U"型或"L"型,亲油岩心电阻率变化曲线呈单调下降趋势。岩石电阻率变化受储层原始润湿性影响。研究结果可为不同润湿性质的油藏水淹层识别和剩余油饱和度评价提供技术支持。Wettability is one of important factors of influencing electrical resistance of reservoir rock. The experiment studies the changing law-s of electrical resistance with oil saturation in the course of fresh water flooding of different wettability cores and discovers the electricity conducting principle of different wettability rocks after the oil layer water flooded. The results indicate that after fresh water flooding the changing curve of electrical resistance of water-wet core shows ＂U＂ and ＂L＂ form, but one of oil-wet core declines. So the change of electrical resistance of the rock is influenced by original wettability. The above studied achievements can provide technical support for the watered-out layer interpretation and residual oil saturation evaluation in different wettability oil reservoirs.

关 键 词：淡水 驱替 电阻率 润湿性 水淹层 

分 类 号：P631.3[天文地球—地质矿产勘探]