Details of the Abstract
| Title of paper | Time-domain finite-element modeling of three-dimensional seismoelectric waves |
| List of authors | Author, Jun Li., Co-author, Changchun Yin., Co-author, Yang Su., Co-author, Libao Wang., Co-author, Bo Zhang., Co-author, Xiuyan Ren., Co-author, Yunhe Liu. |
| Affiliation(s) |
Jun Li., College of Geoexploration Science and Technology, Jilin University, Changchun, China., Changchun Yin., College of Geoexploration Science and Technology, Jilin University, Changchun, China., Yang Su., College of Geoexploration Science and Technology, Jilin University, Changchun, China., Libao Wang. Shandong Huichuang Technology Co., Ltd, Shandong, China., Bo Zhang., College of Geoexploration Science and Technology, Jilin University, Changchun, China., Xiuyan Ren., College of Geoexploration Science and Technology, Jilin University, Changchun, China., Yunhe Liu., College of Geoexploration Science and Technology, Jilin University, Changchun, China. |
| Summary | We propose a three-dimensional time-domain finite-element method for the solution of seismoelectric waves in saturated porous media. Since the electroosmotic feedback is weak, we ignore the mechanical disturbance of the electromagnetic field caused by seismic waves. In this way, we can decouple the electrodynamic coupling equation and solve seismic and electromagnetic waves separately. For the simulation of the seismic waves, we use the explicit finite-element method, where we replace the consistent mass matrix by the lumped mass matrix to make the equation explicitly recursive. Additionally, we leverage the perfectly matched layer to handle the seismic boundary. The seismic wavefield obtained by solving the poroelastic equations is used as the source term to simulate the electromagnetic waves using the finite-element method. Considering the huge velocity difference between electromagnetic and seismic waves, we use an unconditionally stable implicit time recursion when solving the electromagnetic waves. By combining explicit and implicit algorithms, the stability problems with the seismic and electromagnetic modeling can be solved at higher efficiency. By comparing our time-domain finite-element algorithm with the analytical solution for a full-space model, we verified the accuracy of our algorithm. |
| Session Keyword | 2.0 EM theory, modelling and Inversion |
| File upload |
2.0_time-domain_finite-elemen_li.pdf
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