Large-Scale Electromagnetic Modeling for Multiple Inhomogeneous Domains

作     者：Masashi Endo Martin Cuma Michael S.Zhdanov 

作者机构：Department of Geology and GeophysicsUniversity of Utah135S 1460ERm 719Salt Lake CityUT 84112USA 

出 版 物：《Communications in Computational Physics》 (计算物理通讯（英文）)

年 卷 期：2009年第6卷第7期

页      面：269-289页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：University of Utah Consortium for Electromagnetic Modeling and Inversion (CEMI) BAE Systems Baker Atlas Logging Services BGP China National Petroleum Corporation BHP Billiton World Exploration Inc BP Centre for Integrated Petroleum Research EMGS ENI S.p.A ExxonMobil Upstream Research Company FUGRO Halliburton INCO Exploration Information Systems Laboratories MTEM Newmont Mining Co Norsk Hydro OHM Petro-bras Rio Tinto - Kennecott Rocksource Russian Research Center Kurchatov Institute Schlumberger Science Applications International Co Shell International Exploration and Production Inc Statoil Sumitomo Metal Mining Co Zonge Engineering and Research Organization 

主　　题：Large-scale EM modeling multiple inhomogeneous domains marine CSEM 

摘      要：We develop a new formulation of the integral equation(IE)method for three-dimensional(3D)electromagnetic(EM)field computation in large-scale models with multiple inhomogeneous *** problem arises in many practical applications including modeling the EM fields within the complex geoelectrical structures in geophysical *** geophysical applications,it is difficult to describe an earth structure using the horizontally layered background conductivity model,which is required for the efficient implementation of the conventional IE *** a result,a large domain of interest with anomalous conductivity distribution needs to be discretized,which complicates the *** new method allows us to consider multiple inhomogeneous domains,where the conductivity distribution is different from that of the background,and to use independent discretizations for different *** reduces dramatically the computational resources required for largescale *** addition,using this method,we can analyze the response of each domain separately without an inappropriate use of the superposition principle for the EM field *** method was carefully tested for the modeling the marine controlled-source electromagnetic(MCSEM)fields for complex geoelectric structures with multiple inhomogeneous domains,such as a seafloor with the rough bathymetry,salt domes,and *** have also used this technique to investigate the return induction effects from regional geoelectrical structures,e.g.,seafloor bathymetry and salt domes,which can distort the EM response from the geophysical exploration target.