Full-waveform inversion by model extension using a model-space multi-scale approach

Seg Technical Program Expanded Abstracts(2020)

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PreviousNext No AccessSEG Technical Program Expanded Abstracts 2020Full-waveform inversion by model extension using a model-space multi-scale approachAuthors: Guillaume BarnierEttore BiondiGuillaume BarnierStanford UniversitySearch for more papers by this author and Ettore BiondiStanford UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2020-3428421.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractFull waveform inversion by model extension (FWIME) coupled with a model-space multi-scale approach has the potential to become a robust acoustic-velocity model-building algorithm. It combines the robustness of wave-equation migration velocity analysis (MVA) with the accuracy of full waveform inversion (FWI). It mitigates the presence of local minima within the conventional FWI objective function by creating improved descent-paths towards the optimal solution. Its consistent and concise mathematical formulation paired with an automatized implementation makes it simple to apply and thus more accessible to a broad range of non-expert users. We test it on two numerical examples to show its ability to recover accurate solutions from cycle-skipped data dominated by (1) reflected events on the Marmousi2 model, and (2) refracted events on the North Sea region of the BP 2004 model.Presentation Date: Tuesday, October 13, 2020Session Start Time: 8:30 AMPresentation Time: 8:55 AMLocation: 361FPresentation Type: OralKeywords: full-waveform inversion, inversion, optimization, multiscalePermalink: https://doi.org/10.1190/segam2020-3428421.1FiguresReferencesRelatedDetails 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 Guillaume Barnier and Ettore Biondi, (2020), "Full-waveform inversion by model extension using a model-space multi-scale approach," SEG Technical Program Expanded Abstracts : 646-650. https://doi.org/10.1190/segam2020-3428421.1 Plain-Language Summary Keywordsfull-waveform inversioninversionoptimizationmultiscalePDF DownloadLoading ...
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inversion,model extension,full-waveform,model-space,multi-scale
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