WANG ShuMing,
DI QingYun,
WANG Ruo et al
.2018.Removing airwave effects using electromagnetic fields decomposition for 3D MCSEM.Chinese Journal Of Geophysics,61(2): 742-749,doi: 10.6038/cjg2018L0033
Removing airwave effects using electromagnetic fields decomposition for 3D MCSEM
WANG ShuMing1, DI QingYun2, WANG Ruo2, SU XiaoLu1, Mohamed A1
1. Hubei Subsurface Multi-scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Abstract：For marine controlled source electromagnetic (MCSEM) prospecting, it's necessary for us to remove airwave effects when the data are processed and interpreted, and electromagnetic up-going and down-going parts decomposition is a kind of effective technology. In order to quickly and efficiently implement such method, supposing that electromagnetic fields vary slowly along horizontal direction, this paper deduced a new method that only uses horizontal gradient of electromagnetic fields to decompose electromagnetic fields based on Maxwell's equations. The decomposition effects were verified by MCSEM modeling tests which indicates that we can obtain stable and reliable results using the new method, meanwhile demonstrates that the new method is also a kind of qualitative interpretation technology for MCSEM.
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