Seismoelectric numerical modeling in 3D orthorhombic poroelastic medium

Abstract

PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsSeismoelectric numerical modeling in 3D orthorhombic poroelastic mediumAuthors: Munirdin TohtiWenjiao XiaoKefa ZhouMunirdin TohtiXinjiang Institute of Ecology and Geography, Chinese Academy of SciencesSearch for more papers by this author, Wenjiao XiaoXinjiang Institute of Ecology and Geography, Chinese Academy of SciencesSearch for more papers by this author, and Kefa ZhouXinjiang Institute of Ecology and Geography, Chinese Academy of SciencesSearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3581174.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractA set of seismoelectric coupling equations have been developed in 3D porous medium that has electric isotropy and elastic anisotropy. We considered only the anisotropy of orthorhombic type with poroelastic parameters. We computed the seismoelectric response in orthorhombic medium by finite-difference algorithm in time domain with an explosive source implementation. We modeled the coupling firstly by solving seismic wave equations and then used seismic signals as input to compute electric wavefields. We used analytical solution to test our numerical algorithm, and find that the match between the analytical solution and numerical solution is sufficiently close. We then designed several orthorhombic models to simulate the seismoelectric wavefields and analyse the simulation results. We observed from the numerical modeling results that explosive source generates four types of seismic waves in porous media under the influence of anisotropy, which are two separable transverse waves except the fast and slow longitudinal waves, respectively. Each kind of seismic waves were accompanied by coseismic electric signals in homogeneous anisotropic porous media. As far as the anisotropic parameters are concerned, the value of ε (ε1,2) is more sensitive to the anisotropy of the Pf wave, while the value of δ (δ1,δ2,δ3) has more effect on the anisotropic behavior of the S wave.Keywords: numerical, wave propagation, finite differencePermalink: https://doi.org/10.1190/segam2021-3581174.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Munirdin Tohti, Wenjiao Xiao, and Kefa Zhou, (2021), "Seismoelectric numerical modeling in 3D orthorhombic poroelastic medium," SEG Technical Program Expanded Abstracts : 548-552. https://doi.org/10.1190/segam2021-3581174.1 Plain-Language Summary Keywordsnumericalwave propagationfinite differencePDF DownloadLoading ...