Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode

We propose a frequency-domain finite-element (FDFE) method to simulate the 2-D SHTE mode seismoelectric and electroseismic waves. By neglecting the secondary weak wavefield feedbacks, the SH and TE waves are solved, separately. In a finite plane region, propagations of both SH and TE waves can be de...

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Main Authors: Wang, Dongdong, Gao, Yongxin, Zhou, Guanqun, Tong, Ping, Cheng, Qianli, Yao, Cheng, Bai, Xiaodong
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/171377
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1713772023-10-23T06:42:31Z Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode Wang, Dongdong Gao, Yongxin Zhou, Guanqun Tong, Ping Cheng, Qianli Yao, Cheng Bai, Xiaodong School of Physical and Mathematical Sciences Asian School of the Environment Earth Observatory of Singapore Science::Geology Electrical Properties Electromagnetic Theory We propose a frequency-domain finite-element (FDFE) method to simulate the 2-D SHTE mode seismoelectric and electroseismic waves. By neglecting the secondary weak wavefield feedbacks, the SH and TE waves are solved, separately. In a finite plane region, propagations of both SH and TE waves can be described as the Helmholtz equation with boundary conditions, which is proved to be equivalent to the extremum of functional by conducting calculus of variation. The computation region is partitioned into structured rectangular elements with the bilinear interpolation. The proposed FDFE algorithm solves the wavefield in frequency domain and avoids adopting the quasi-static approximation. One advantage of the proposed algorithm is its ability to accurately simulate the seismoelectric and electroseismic responses generated from the free surface. We verify the proposed algorithm based on a layered model beneath a free surface by comparing the waveforms calculated using the FDFE algorithm with those calculated using analytically-based method. The proposed algorithm is applied in feasibility studies of interface seismoelectric and electroseismic responses in exploring the hydrocarbon reservoir and monitoring the time-lapse pollutant within a sand channel. This work is supported by National Natural Science Foundation of China (grant 42174084) and Fundamental Research Funds for the Central Universities of China (grant JZ2021HGPB0058). 2023-10-23T06:42:30Z 2023-10-23T06:42:30Z 2023 Journal Article Wang, D., Gao, Y., Zhou, G., Tong, P., Cheng, Q., Yao, C. & Bai, X. (2023). Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode. Geophysical Journal International, 234(3), 2307-2328. https://dx.doi.org/10.1093/gji/ggad236 0956-540X https://hdl.handle.net/10356/171377 10.1093/gji/ggad236 2-s2.0-85164300018 3 234 2307 2328 en Geophysical Journal International © 2023 The Author(s). Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Geology
Electrical Properties
Electromagnetic Theory
spellingShingle Science::Geology
Electrical Properties
Electromagnetic Theory
Wang, Dongdong
Gao, Yongxin
Zhou, Guanqun
Tong, Ping
Cheng, Qianli
Yao, Cheng
Bai, Xiaodong
Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode
description We propose a frequency-domain finite-element (FDFE) method to simulate the 2-D SHTE mode seismoelectric and electroseismic waves. By neglecting the secondary weak wavefield feedbacks, the SH and TE waves are solved, separately. In a finite plane region, propagations of both SH and TE waves can be described as the Helmholtz equation with boundary conditions, which is proved to be equivalent to the extremum of functional by conducting calculus of variation. The computation region is partitioned into structured rectangular elements with the bilinear interpolation. The proposed FDFE algorithm solves the wavefield in frequency domain and avoids adopting the quasi-static approximation. One advantage of the proposed algorithm is its ability to accurately simulate the seismoelectric and electroseismic responses generated from the free surface. We verify the proposed algorithm based on a layered model beneath a free surface by comparing the waveforms calculated using the FDFE algorithm with those calculated using analytically-based method. The proposed algorithm is applied in feasibility studies of interface seismoelectric and electroseismic responses in exploring the hydrocarbon reservoir and monitoring the time-lapse pollutant within a sand channel.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Wang, Dongdong
Gao, Yongxin
Zhou, Guanqun
Tong, Ping
Cheng, Qianli
Yao, Cheng
Bai, Xiaodong
format Article
author Wang, Dongdong
Gao, Yongxin
Zhou, Guanqun
Tong, Ping
Cheng, Qianli
Yao, Cheng
Bai, Xiaodong
author_sort Wang, Dongdong
title Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode
title_short Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode
title_full Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode
title_fullStr Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode
title_full_unstemmed Finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-D SHTE mode
title_sort finite-element modelling of seismoelectric and electroseismic waves in frequency domain: 2-d shte mode
publishDate 2023
url https://hdl.handle.net/10356/171377
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