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• W2077030666 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2007Velocity model building: A comparison between prestack stereotomography and NIP‐wave tomographyAuthors: Stefan DummongKristina MeierChristian HubscherDirk GajewskiStefan DummongUniversity of Hamburg, GermanySearch for more papers by this author, Kristina MeierUniversity of Hamburg, GermanySearch for more papers by this author, Christian HubscherUniversity of Hamburg, GermanySearch for more papers by this author, and Dirk GajewskiUniversity of Hamburg, GermanySearch for more papers by this authorhttps://doi.org/10.1190/1.2793101 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Velocity model determination during seismic data processing is crucial for any kind of depth imaging. Tomography procedures are often used to generate suitable models. In this paper, we compare two approaches of grid tomography: prestack stereotomography (PST) and NIP‐wave tomography (NIPT). Whereas NIPT is based on Common Reflection Surface (CRS) stack attributes, and thus on the underlying hyperbolic second‐order traveltime approximation PST describes traveltimes by local slopes (i.e. linearly) in the prestack data domain. To analyze the impact of the different traveltime approximations on velocity model building we have applied both techniques to a real marine dataset. The obtained velocity models reveal that the reconstruction of high velocity contrasts by grid tomographic methods is limited due to the smooth description of the velocity distribution for the data set used in this study. The lateral resolution of velocities obtained from PST appears to be slightly better than those from NIPT which might be related to the difference in the local approximation of traveltimes and to the determination of input data. Other differences are mainly caused by different implementations of the inversion schemes, the different grid spacing and outliers in the input data. Careful pre‐processing of the data will therefore improve the model building as well as the depth imaging in both cases.Permalink: https://doi.org/10.1190/1.2793101FiguresReferencesRelatedDetailsCited ByStereotomographyGilles Lambaré1 October 2008 | GEOPHYSICS, Vol. 73, No. 5 SEG Technical Program Expanded Abstracts 2007ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2007 Pages: 3124 publication data© 2007 Copyright © 2007 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 14 Sep 2007 CITATION INFORMATION Stefan Dummong, Kristina Meier, Christian Hubscher, and Dirk Gajewski, (2007), Velocity model building: A comparison between prestack stereotomography and NIP‐wave tomography, SEG Technical Program Expanded Abstracts : 3034-3038. https://doi.org/10.1190/1.2793101 Plain-Language Summary PDF DownloadLoading ..." @default.
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• W2077030666 title "Velocity model building: A comparison between prestack stereotomography and NIP‐wave tomography" @default.
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