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• W3091616739 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2020Graph space optimal transport based FWI: 3D OBC Valhall case studyAuthors: A. PladysR. BrossierM. IrnakaN. KamathL. MétivierA. PladysUniversity of Grenoble Alpes, ISTerreSearch for more papers by this author, R. BrossierUniversity of Grenoble Alpes, ISTerreSearch for more papers by this author, M. IrnakaUniversity of Grenoble Alpes, ISTerreSearch for more papers by this author, N. KamathUniversity of Grenoble Alpes, ISTerreSearch for more papers by this author, and L. MétivierUniversity of Grenoble Alpes, ISTerre and University of Grenoble Alpes, CNRS, LJKSearch for more papers by this authorhttps://doi.org/10.1190/segam2020-3420007.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractOptimal transport (OT) distances have been recently proposed to mitigate the non-convexity of the L2 misfit function in FWI. However, OT is only applicable to positive and normalized data. To overcome this difficulty, we have proposed to rely on the interpretation of the discrete graph space of the data through OT. In this study, we compare this approach to the classical L2 misfit on the inversion of 3D OBC data from the Valhall field, using a visco-acoustic time-domain FWI algorithm. Starting from a crude 1D linear initial velocity model which generates heavy cycle-skipping when used with L2 misfit, the graph space optimal transport allows recovering an acceptable velocity model down to 2 km depth, while only marginally increasing the computational cost compared to standard L2 FWI.Presentation Date: Tuesday, October 13, 2020Session Start Time: 1:50 PMPresentation Time: 3:05 PMLocation: 361FPresentation Type: OralKeywords: 3D, acoustic, anisotropy, attenuation, full-waveform inversionPermalink: https://doi.org/10.1190/segam2020-3420007.1FiguresReferencesRelatedDetailsCited byGraph-space optimal transport-based 3D elastic FWI for near-surface seismic applicationsDmitry Borisov, Richard D. Miller, Shelby L. Peterie, Julian Ivanov, Anthony M. Hoch, and Steven D. Sloan15 August 2022New insights on the graph-space optimal transport distance for full-waveform inversionLudovic Métivier and Romain Brossier1 September 2021On cycle-skipping and misfit function modification for full-wave inversion: Comparison of five recent approachesArnaud Pladys, Romain Brossier, Yubing Li, and Ludovic Métivier7 July 2021 | GEOPHYSICS, Vol. 86, No. 4Graph‐Space Optimal Transport Concept for Time‐Domain Full‐Waveform Inversion of Ocean‐Bottom Seismometer Data: Nankai Trough Velocity Structure Reconstructed From a 1D Model25 May 2021 | Journal of Geophysical Research: Solid Earth, Vol. 126, No. 5 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 A. Pladys, R. Brossier, M. Irnaka, N. Kamath, and L. Métivier, (2020), Graph space optimal transport based FWI: 3D OBC Valhall case study, SEG Technical Program Expanded Abstracts : 696-700. https://doi.org/10.1190/segam2020-3420007.1 Plain-Language Summary Keywords3Dacousticanisotropyattenuationfull-waveform inversionPDF DownloadLoading ..." @default.
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• W3091616739 title "Graph space optimal transport based FWI: 3D OBC Valhall case study" @default.
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