Paper Info
Title
Goal-Oriented 3-D Time-Domain Marine CSEM Modeling With Anisotropy and Topography
Abstract
We have proposed a goal-oriented iteration algorithm with adaptive error estimation for the 3-D modeling of the time-domain marine controlled-source electromagnetic (CSEM) method. The algorithm is based on finite-element time-domain (FETD) formulations, and it updates both the time step and the mesh size in a staggered manner. With this scheme, the computational error is well suppressed, and the efficiency of the FETD simulation is guaranteed by adaptive time-stepping within each iteration. The verification results of an electric dipole radiation model and a synthetic 1-D marine CSEM model have shown that the proposed algorithm achieves a fine balance between computational accuracy and efficiency. Through numerical examples incorporated with stratum anisotropy and seafloor topography, we further conclude that both background anisotropy and topography impede the identification of submarine high-resistivity bodies with the electric field response. Contrarily, the time derivative of the magnetic field is sensitive to high-resistivity reservoirs over an extensive period of time in both anisotropic and topographic models. Based on this, we suggest that the magnetic field should be collected along with the electric field over the whole target area to reveal the anisotropic structure of submarine sediments and the existence of oil and gas reservoirs.
Year
DOI
Venue
2022
10.1109/TGRS.2021.3079316
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Keywords
DocType
Volume
Time-domain analysis, Mathematical model, Electromagnetics, Anisotropic magnetoresistance, Finite element analysis, Conductivity, Solid modeling, Controlled-source electromagnetic (CSEM) method, finite-element time-domain (FETD) method
Journal
60
ISSN
Citations 
PageRank 
0196-2892
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Xiaodong Yang100.34
Mingxin Yue200.34
Daiming Hu300.34
Yong Li48822.09
Xiaoping Wu500.68