Three-dimensional tensor controlled-source electromagnetic modeling based on the vector finite-element method
Hu Ying-Cai1, Li Tong-Lin1, Fan Cui-Song2, Wang Da-Yong3, and Li Jian-Ping4
1. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China.
2. Tianjing Center, China Geological Survey, Tianjing 300170, China.
3. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China.
4. College of Geosciences and Technology, ShanDong University of Science and Technology, Qingdao 266590, China.
Abstract Scalar CSAMT is only suitable for measurements in one and two dimensions perpendicular to geological structures. For complex 3D geoelectric structure, tensor CSAMT is more suitable. In this paper, we discuss 3D tensor CSAMT forward modeling using the vector finite-element method. To verify the feasibility of the algorithm, we calculate the electric field, magnetic field, and tensor impedance of the 3D CSAMT far-zone field in layered media and compare them with theoretical solutions. In addition, a three-dimensional anomaly in half-space is also simulated, and the response characteristics of the impedance tensor and the apparent resistivity and impedance phase are analyzed. The results suggest that the vector finite-element method produces high-precision electromagnetic field and impedance tensor data, satisfies the electric field discontinuity, and does not require divergence correction using the vector finite-element method.
This work was supported by the National Natural Science Foundation of China (No. 41104068) and the Deep Exploration in China, SinoProbe-03-05.
Cite this article:
Hu Ying-Cai,Li Tong-Lin,Fan Cui-Song et al. Three-dimensional tensor controlled-source electromagnetic modeling based on the vector finite-element method[J]. APPLIED GEOPHYSICS, 2015, 12(1): 35-46.
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2015, Vol. 12 
