Acoustic-elastic waveform modeling and inversion using energy-stable summation-by-parts finite-difference operators

First International Meeting for Applied Geoscience & Energy Expanded Abstracts(2021)

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PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsAcoustic-elastic waveform modeling and inversion using energy-stable summation-by-parts finite-difference operatorsAuthors: Milad BaderMartin AlmquistEric M. DunhamMilad BaderStanford UniversitySearch for more papers by this author, Martin AlmquistUppsala UniversitySearch for more papers by this author, and Eric M. DunhamStanford UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3579516.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractRecording seismic data at the ocean bottom provides a powerful tool to characterize the subsurface and monitor producing fields in offshore environments. However, to use such data in advanced waveform imaging and inversion algorithms, an accurate and efficient numerical method is needed, accounting for the fluid-solid interface. We propose solving the coupled acoustic-elastic wave equation using summation-by-parts finite difference operators. We weakly impose boundary and interface conditions using simultaneous approximation terms. The overall numerical scheme is energystable and accommodates point sources/receivers anywhere in the domain. Furthermore, it is dual consistent, meaning that the adjoint of the fully discrete problem is a high-order approximation of the continuous adjoint problem; in fact, the same code can be used for forward and adjoint modeling to generate accurate gradients for full-waveform inversion. We verify our method by comparing it with the spectral-element method, demonstrating similar accuracy. We also perform fullwaveform inversion tests on the Marmousi2 model using two types of acquisitions.Keywords: full-waveform inversion, boundary conditions, numerical, ocean-bottom node, finite differencePermalink: https://doi.org/10.1190/segam2021-3579516.1FiguresReferencesRelatedDetails 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 Milad Bader, Martin Almquist, and Eric M. Dunham, (2021), "Acoustic-elastic waveform modeling and inversion using energy-stable summation-by-parts finite-difference operators," SEG Technical Program Expanded Abstracts : 2445-2449. https://doi.org/10.1190/segam2021-3579516.1 Plain-Language Summary Keywordsfull-waveform inversionboundary conditionsnumericalocean-bottom nodefinite differencePDF DownloadLoading ...
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inversion,acoustic-elastic,energy-stable,summation-by-parts,finite-difference
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