Adaptive finite element modeling of marine controlled-source electromagnetic fields in two-dimensional general anisotropic media

作者：Li Yuguo; Luo Ming; Pei Jianxin^*

来源：Journal of Ocean University of China, 2013, 12(1): 1-5.

DOI：10.1007/s11802-013-2110-3

• adaptive finite elements
• marine CSEM
• general anisotropy

In this paper, we extend the scope of numerical simulations of marine controlled-source electromagnetic (CSEM) fields in a particular case of anisotropy (dipping anisotropy) to the general case of anisotropy by using an adaptive finite element approach. In comparison to a dipping anisotropy case, the first order spatial derivatives of the strike-parallel components arise in the partial differential equations for generally anisotropic media, which cause a non-symmetric linear system of equations for finite element modeling. The adaptive finite element method is employed to obtain numerical solutions on a sequence of refined unstructured triangular meshes, which allows for arbitrary model geometries including bathymetry and dipping layers. Numerical results of a 2D anisotropic model show both anisotropy strike and dipping angles have great influence on the marine CSEM responses.

• 出版日期2013-3
• 单位中国海洋大学