油气藏电性异常模式与电磁法油气检测

 油气藏的油气水分布特征及其物性差异是地球物理勘探的基础，油气藏的电性差异是其中最明显的特征之一，同时油气藏又是一个多相动态平衡系统，其中的双相介质形成的双电层是油气藏激发极化异常产生的根源。分析认为油气藏从立体看来具有“环状三层楼”电性异常模式，因此可根据探测深度与油气藏的位置来分析电性异常特征。针对油气藏的这种特点，可以充分利用电磁法的优势，开展三维高精度电磁油气检测，立体研究油气藏的电性异常规律，预测油水边界，指导勘探部署，减小钻探风险。“环状三层楼”油气藏异常检测的应用示例表明，该方法是有效果的。

Geo-electrical anomalous pattern of reservoir and oil/gas detection by electromagnetic survey

Distribution feature of oil,gas and water in reservoir and physical difference are the bases of geophysical exploration,and it is considered by analysis that geo-electrical difference of reservoir is one of the most distinctive features.Meanwhile,reservoir is also the dynamic multiphase balance system,in which the double electric layer formed from biphase medium is the source produced by induced polarization anomaly of reservoir,and points out the reservoir has geo-electric anomalous pattern of "three-storey annular building".People should develop 3-D high-precision electromagnetic sounding to effectively detect reservoir,study the geo-electric anomalous feature of reservoir from shallow to deep,and paper shows the application cases detecting practical reservoir of "three-storey annular building".