Chen Xiao1, Yu Peng2, Deng Juzhi1, Ge Kunpeng1, Wang Yanguo1, Zhang Hua1
1. Engineering Research Center of Nuclear Technology Application, East China Institute of Technology, Nanchang, Jiangxi 330013, China;
2. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
Abstract:For previous geophysical joint inversion research,geophysicists' concerns usually are some key techniques rather than its framework.In addition,an initial model building for rigorous joint inversions is strongly dependent on artificial judgments,and results considerably rely on the initial model.Therefore,we provide a new framework for geophysical joint inversion,which is called as "multiple modeling,integrated constraints,and step-by-step inversion".In this framwork,model buildings and joint inversions are realized in stages based on multiple types of constraints.We take a joint inversion of magnetotelluric (MT) and seismic data for example to illustrate the new framework,and design a typical basalt model to test the new framework.MT and seismic methods show their limitations in the single model test.Then,we apply the joint inversion to complement each other based on the new framework,and study the distribution of strata under basalt using a common initial model.Comparing with the formerly joint inversion needing a detailed initial model,the new method can reduce the influence of human factors during the initial model building, and lower the reliance of the result on the initial model to some extent.
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