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A multi-domain decomposition based Fourier finite element method for the simulation of 3D marine CSEM measurements

Author name : SHAABAN ALI SHAABAN BAKR
Publication Date : 2017-01-25
Journal Name : Computational Geosciences

Abstract

We introduce a multi-domain decomposition Fourier finite element (MDDFFE) method for the simulation of three-dimensional (3D) marine controlled source electromagnetic measurement (CSEM). The method combines a 2D finite element (FE) method in two spatial dimensions with a hybrid discretization based on a Fourier FE method along the third dimension. The method employs a secondary field formulation rather than the total field formulation. We apply the MDDFFE method to several synthetic marine CSEM examples exhibiting bathymetry and/or multiple 3D subdomains. Numerical results show that the use of the MDDFFE method reduces the problem size by as much as 87 % in terms of the number of unknowns, without any sacrifice in accuracy.

Keywords

Multi-domain decomposition · finite element method · secondary field formulation · Fourier series · marine CSEM

Publication Link

https://doi.org/10.1007/s10596-017-9615-6

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