Anisotropic full-azimuth velocity model building using joint reflection-refraction tomography

PreviousNext No AccessSecond International Meeting for Applied Geoscience & EnergyAnisotropic full-azimuth velocity model building using joint reflection-refraction tomographyAuthors: Matan ShustakItai SharabiOrly Kletenik-EdelmanElive MenyoliIke ImalaRonit LevyZvi KorenMatan ShustakEmersonSearch for more papers by this author, Itai SharabiEmersonSearch for more papers by this author, Orly Kletenik-EdelmanEmersonSearch for more papers by this author, Elive MenyoliEmersonSearch for more papers by this author, Ike ImalaEmersonSearch for more papers by this author, Ronit LevyEmersonSearch for more papers by this author, and Zvi KorenEmersonSearch for more papers by this authorhttps://doi.org/10.1190/image2022-3749767.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractOne of the main challenges in seismic imaging, especially of land data, is building the near surface velocity model, as it is normally characterized by very low velocity values with different types of local anomalies. Resolving the near surface velocity model using only refraction data (e.g., refraction tomography) is insufficient, as it does not provide the required lateral resolution. Using only reflection data is equally insufficient, as it does not provide the required vertical resolution. We present a tomographic approach for simultaneously resolving the shallow and deep subsurface anisotropic velocity fields, where we jointly utilize both reflection and refraction data. By constructing a constrained joint reflection-refraction objective function, we show that this tomography can provide high-resolution anisotropic velocity models and subsequent accurate depth migration images. The method has been successfully applied to a 3D dataset from the Eagle Ford play in south central Texas. The results demonstrate that the method produces a very accurate near surface anisotropic velocity model.Keywords: tomography, anisotropy, refraction, reflection, inversionPermalink: https://doi.org/10.1190/image2022-3749767.1FiguresReferencesRelatedDetails 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 Online: 15 Aug 2022 CITATION INFORMATION Matan Shustak, Itai Sharabi, Orly Kletenik-Edelman, Elive Menyoli, Ike Imala, Ronit Levy, and Zvi Koren, (2022), "Anisotropic full-azimuth velocity model building using joint reflection-refraction tomography," SEG Technical Program Expanded Abstracts : 3359-3363. https://doi.org/10.1190/image2022-3749767.1 Plain-Language Summary KeywordstomographyanisotropyrefractionreflectioninversionPDF DownloadLoading ...