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• W4291719093 abstract "PreviousNext You have accessSecond International Meeting for Applied Geoscience & EnergyFirst-arrival traveltime and slope tomography in tilted anisotropic media with undulant topographyAuthors: Xiaole ZhouSerge SambolianGaoshan GuoStephane OpertoHaiqiang LanLing ChenXiaole ZhouChinese Academy of SciencesSearch for more papers by this author, Serge SambolianGeoazur-CNRS-IRD-UNS-OCA and Université Grenoble AlpesSearch for more papers by this author, Gaoshan GuoGeoazur-CNRS-IRD-UNS-OCASearch for more papers by this author, Stephane OpertoGeoazur-CNRS-IRD-UNS-OCASearch for more papers by this author, Haiqiang LanChinese Academy of SciencesSearch for more papers by this author, and Ling ChenChinese Academy of SciencesSearch for more papers by this authorhttps://doi.org/10.1190/image2022-3751546.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractFirst-arrival traveltime and slope tomography uses traveltimes, source and receiver slopes of locally-coherent events to build high-resolution subsurface velocity models. These models can be further used as background/initial models for depth migration or full waveform inversion. However, complex topography or bathymetry can cause numerical complications when discretization is performed on rectangular grids. To take into account complex known geometries in a versatile and accurate way, we calculate slopes and traveltimes of locally-coherent events with a finite-difference (FD) factored eikonal solver on curvilinear grid using a 2D surface-flattening scheme. Moreover, a matrix-free inverse problem is implemented with the adjoint-state method for the estimation of the data misfit gradient. This new formulation of slope tomography is extended to TTI acoustic media, where the model space is parameterized by four anisotropic parameters (vv, ε, δ, θ). Preliminary synthetic tests with complex topography and surface acquisition validate the formulation of the method.Keywords: slope tomography, topography, anisotropyPermalink: https://doi.org/10.1190/image2022-3751546.1FiguresReferencesRelatedDetails Second International Meeting for Applied Geoscience & EnergyISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2022 Pages: 3694 publication data© 2022 Published in electronic format with permission by the Society of Exploration Geophysicists and the American Association of Petroleum GeologistsPublisher:Society of Exploration Geophysicists HistoryPublished: 15 Aug 2022 CITATION INFORMATION Xiaole Zhou, Serge Sambolian, Gaoshan Guo, Stephane Operto, Haiqiang Lan, and Ling Chen, (2022), First-arrival traveltime and slope tomography in tilted anisotropic media with undulant topography, SEG Technical Program Expanded Abstracts : 3384-3388. https://doi.org/10.1190/image2022-3751546.1 Plain-Language Summary Keywordsslope tomographytopographyanisotropyPDF DownloadLoading ..." @default.
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• W4291719093 date "2022-08-15" @default.
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• W4291719093 title "First-arrival traveltime and slope tomography in tilted anisotropic media with undulant topography" @default.
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• W4291719093 doi "https://doi.org/10.1190/image2022-3751546.1" @default.
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