3D finite-difference frequency-domain modeling of controlled-source EM data using a direct matrix solver
I present the implementation of a 3D finite-difference frequency-domain (FDFD) modeling algorithm for simulating low-frequency marine controlled-source electromagnetic data. The FDFD algorithm solves a Helmholtz equation for the secondary electric fields. Exploiting recent advances in computer technology and algorithmic developments, a direct solution approach was chosen for inverting the system matrix arising from the FDFD equations. The direct solution offers advantages over iterative approaches for multi-source modeling, and is particularly suitable for the envisaged use of this algorithm within an inversion scheme. Initial testing of the algorithm indicates that it allows simulating data for models of meaningful size on our relatively small cluster. Since the tractable model size is still somewhat limited, careful application of suitable boundary conditions is crucial. Improvements of the simple boundary conditions used preliminarily are likely to improve the accuracy of the modeling results.
Controlled source electromagnetics modeling 3D finite-difference frequency domain direct solver
Rita STREICH
SINTEF Petroleum Research, Trondheim, Norway
国际会议
The 19th International Workshop on Electromagnetic Induction in the Earth(第十九届国际地球电磁感应学术研讨会)
北京
英文
540-545
2008-10-23（万方平台首次上网日期，不代表论文的发表时间）