【摘要】 基于含油储层与其周围饱含水地层之间的巨大电阻率差异,为海洋CSEM方法直接探测油气储层,并取得良好效果提供了条件,此法采用船载可移动水平电偶极子源和置于海底的陈列电磁接收器接收来自海底地层的电磁信号,通过对接收到的电磁场信号进行处理、解释,得到地下地层的电阻率分布,借助电阻率与储层含油气饱和度的密切关系,直接探测地层的含油气性。本文通过对近年在国际学术会议及相关学术期刊关于可控源海洋电磁法文献的追踪分析,介绍了可控源海洋电磁探测方法(CSEM)的基本原理、发展历史、采集与处理解释技术,并对研究现状、应用中存在的挑战与问题进行了分析,指出了海洋CSEM未来的发展与研究方向,以供国内油气勘探业界及相关研究人员参考。更多还原

【Abstract】 The giant impedance difference between oil-bearing reservoir and surrounding water-saturated strata provides condition for directly detecting oil/gas reservoir by marine CSEM method and achieving good results. The method uses shipboard movable horizontal electric dipole source and array electromagnetic receiver planted into sea bottom to receive the electromagnetic signal coming from seabottom strata, obtains impedance distribution of underground strata by carrying out processing and interpretation of received signal of electromagnetic field and directly detects the oil/gas-bearing feature of strata in the aid of the close relationship between impedance and oil/gas saturation of reservoir. Through tracing and analyzing the CSEM literature published in international symposium and corresponding research periodicals in recent years, the paper introduced the basic principle, developing history and acquisition, processing and interpretation technique of marine CSEM method, carried out study on the research situation, challenge and problems existed in application and pointed out future development and research direction of marine CSEM method, which gave a reference to oil/gas prospecting industry and relevant researchers at home.更多还原