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- W3091388845 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 20203D acoustic-(visco)elastic coupled formulation and its spectral-element implementation on a Cartesian-based hexahedral meshAuthors: Jian CaoRomain BrossierLudovic MétivierJian CaoUniversity of Grenoble AlpesSearch for more papers by this author, Romain BrossierUniversity of Grenoble AlpesSearch for more papers by this author, and Ludovic MétivierUniversity of Grenoble AlpesSearch for more papers by this authorhttps://doi.org/10.1190/segam2020-3423098.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractOcean Bottom Node (OBN) acquisition is becoming popular in the exploration of challenging marine environments. A major advantage over conventional streamer acquisition is its ability of capturing converted wave by recording both P- and S-wave on the solid seabed. Thus, to study and process OBN data, modeling of seismic wave propagation in fluid-solid coupled media needs to be taken into account. In this study, we apply a partitioned approach to fluid-solid coupled media. Fluid and solid domains are divided explicitly and handled with the acoustic-wave and (visco)elastic-wave equation, respectively. The mutual interaction between these two wave-equations is modeled by boundary conditions at the fluid-solid interface. This leads to a coupled acoustic-(visco)elastic wave-equation system. According to the wavefield variables used in the acoustic-wave equation, we compare 4 acoustic-(visco)elastic coupled formulations in terms of pressure, velocity potential, displacement potential and displacement, respectively. The spectral-element method (SEM) is used as a numerical modeling tool to reveal their pros and cons from the aspects of complexity, accuracy and computational efficiency. Finally, we present various fluid-solid coupled modeling examples including isotropic elastic, anisotropic elastic (VTI and TTI) and anelastic media on the Cartesian-based hexahedral mesh. They are all implemented with the displacement potential formulation which achieves the best trade-off compared with the other three.Presentation Date: Wednesday, October 14, 2020Session Start Time: 1:50 PMPresentation Time: 2:40 PMLocation: 360APresentation Type: OralKeywords: 3D, Multiphysics, modeling, ocean-bottom node, finite elementPermalink: https://doi.org/10.1190/segam2020-3423098.1FiguresReferencesRelatedDetailsCited by3-D multiparameter full-waveform inversion for ocean-bottom seismic data using an efficient fluid–solid coupled spectral-element solver27 November 2021 | Geophysical Journal International, Vol. 229, No. 1Single Pass Computation of First Seismic Wave Travel Time in Three Dimensional Heterogeneous Media With General Anisotropy7 September 2021 | Journal of Scientific Computing, Vol. 89, No. 13D fluid-solid coupled full-waveform inversion for ocean-bottom seismic dataJian Cao, Romain Brossier, and Ludovic Metivier1 September 2021Numerical method for the computation of first-arrival time of seismic waves with general anisotropyFrançois Desquilbet, Ludovic Métivier, and Jean-Marie Mirebeau1 September 2021 SEG Technical Program Expanded Abstracts 2020ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2020 Pages: 3887 publication data© 2020 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 30 Sep 2020 CITATION INFORMATION Jian Cao, Romain Brossier, and Ludovic Métivier, (2020), 3D acoustic-(visco)elastic coupled formulation and its spectral-element implementation on a Cartesian-based hexahedral mesh, SEG Technical Program Expanded Abstracts : 2643-2647. https://doi.org/10.1190/segam2020-3423098.1 Plain-Language Summary Keywords3DMultiphysicsmodelingocean-bottom nodefinite elementPDF DownloadLoading ..." @default.
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