激电效应对海洋可控源电磁响应的影响  

Influence of IP effects on marine controlled-source electromagnetic responses

作　　者：丁学振 李予国[1,2] 刘颖[1,2] Ding Xuezhen;Li Yuguo;Liu Ying(College of Marine Geosciences,Ocean University of China,Qingdao,Shandong 266100,China;Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education,Qingdao,Shandong 266100,China)

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《石油地球物理勘探》2018年第6期1341-1350,I0010,共11页Oil Geophysical Prospecting

基　　金：国家自然基金重点项目(41130420)资助

摘　　要：在海洋可控源电磁法数值模拟和反演解释中,通常没有考虑激电效应的影响。本文基于Cole-Cole模型,在一维和二维海洋可控源电磁正演模拟中考虑了激电效应,计算海洋可控源电磁场响应,并定义一个新的参数——IP强度,用以表征激电效应的强弱。在一维海洋可控源电磁反演中也考虑了激电效应,分析激电效应对反演结果的影响。计算结果表明:激电参数、观测频率、储层厚度等参数会影响激电效应的强度,激电效应会导致反演结果中油气储层电阻率偏大,但是影响不是非常显著。In the numerical simulation and interpretation of marine controlled-source electromagnetic (MCSEM)datasets,IP effects are usually ignored.In this paper,we study the IP influences on the 1D and 2D MCSEM modeling responses based on the Cole-Cole model.A new parameter-IP strength is defined for evaluating the strength of IP effects. We introduce the influence of IP effects on 1D MCSEM inversion.Numerical results suggest that IP effects depend on polarization parameters,observing frequency and reservoir thickness.IP effects may lead higher reservoir resistivity,however this deviation is not very significant.

关 键 词：海洋可控源电磁法 激电效应 Cole—Cole模型 IP强度 

分 类 号：P631[天文地球—地质矿产勘探]