Seismoelectric and Electroseismic Modeling in Stratified Porous Media With a Shallow or Ground Surface Source

Zheng，Xu Zhen1,2; Ren，Hengxin2; Butler，Karl E.3; Zhang，Haiming4; Sun，Yao Chong2; Zhang，Wei2; Huang，Qinghua4; Chen，Xiaofei2

2021-09-01

10.1029/2021JB021950

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH   影响因子和分区

2169-9313

2169-9356

For a shallow or ground surface source and receiver at the same level or close depth, it is very difficult or computationally inefficient to simulate seismoelectric or electroseismic wave-fields in stratified porous media by current reflectivity methods, such as the Luco-Apsel-Chen generalized reflection and transmission method (LAC GRTM). In this work, the peak-trough averaging method which has been proved effective and efficient in dealing with this kind of computational problem is adopted to update the seismoelectric and electroseismic modeling algorithm based on LAC GRTM. After thoroughly verifying the accuracy and computational efficiency of the updated algorithm, we utilize it to numerically investigate both the electroseismic and seismoelectric couplings. Snapshots of electroseismic wave-fields indicate evanescent electroseismic conversion, a reverse process of evanescent seismoelectric conversion, dominates at relatively larger ratios of seismic wavelength to interface depth, whereas the interfacial radiation electroseismic conversion is more prominent for the opposite situation. Our seismoelectric modeling results demonstrate that electric signals can arrive at the ground surface a few milliseconds earlier than their causative seismic signals due to evanescent seismoelectric conversion. This is the first modeling result considering source-receiver geometries on the surface capable of explaining similar phenomena reported in geophysical field observations of seismically induced electrokinetic effects over a long history. The updated algorithm offers an accurate and efficient tool for forward modeling and will benefit interpretations of field observations as well as future inversion studies.

a shallow or ground surface source accurate and efficient algorithm electric signals prior to seismic arrivals evanescent seismoelectric conversion seismoelectric and electroseismic couplings

SCI

英语

通讯

WOS:000703087900051

GEOSCIENCES

2-s2.0-85115726805

Scopus

1.Department of Astronautical Science and Mechanics,Harbin Institute of Technology,Harbin,China
2.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,China
3.Department of Earth Sciences,University of New Brunswick,Fredericton,Canada
4.Department of Geophysics,School of Earth and Space Sciences,Peking University,Beijing,China

Zheng，Xu Zhen,Ren，Hengxin,Butler，Karl E.,et al. Seismoelectric and Electroseismic Modeling in Stratified Porous Media With a Shallow or Ground Surface Source[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(9).

Zheng，Xu Zhen.,Ren，Hengxin.,Butler，Karl E..,Zhang，Haiming.,Sun，Yao Chong.,...&Chen，Xiaofei.(2021).Seismoelectric and Electroseismic Modeling in Stratified Porous Media With a Shallow or Ground Surface Source.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(9).

Zheng，Xu Zhen,et al."Seismoelectric and Electroseismic Modeling in Stratified Porous Media With a Shallow or Ground Surface Source".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.9(2021).