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- W2020167732 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2005Fast 3‐D common reflection‐point based tomographic seismic migration velocity analysisAuthors: Weihong FeiGeorge A. McMechanWeihong FeiThe University of Texas at DallasSearch for more papers by this author and George A. McMechanThe University of Texas at DallasSearch for more papers by this authorhttps://doi.org/10.1190/1.2148241 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract 3‐D prestack depth migration and residual picking in common image gathers (CIGs) are the most timeconsuming part in 3‐D migration velocity analysis. We propose a new algorithm that provides 3‐D velocity analysis quickly and accurately. Spatial coordinates and orientations of reflection points are provided by 3‐D poststack or prestack parsimonious migration; the migration involves only time samples that are picked from the salient reflection events on a poststack volume or on one common‐offset volume. Ray tracing from the reflection points to the surface provides a common‐reflection point (CRP) gather for each reflection point. Predicted moveouts for local velocity perturbations, based on the maximizing stacked amplitude, gives the estimated velocity updates for each CRP gather. The traveltime picking is limited to only a stacked or common‐offset volume, and it needs to be done only once; there is no need to do intensive 3‐D prestack depth migration. Hence, the computation is much faster than other migration‐based velocity analyses. 3‐D synthetic data tests show the algorithm works effectively and efficiently.Permalink: https://doi.org/10.1190/1.2148241FiguresReferencesRelatedDetailsCited ByPractical aspects of parsimonious migration for velocity tomographyWeihong Fei, Duryodhan Epili, and Young Kim6 October 2006 SEG Technical Program Expanded Abstracts 2005ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2005 Pages: 2668 publication data© 2005 Copyright © 2005 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 07 Dec 2005 CITATION INFORMATION Weihong Fei and George A. McMechan, (2005), Fast 3‐D common reflection‐point based tomographic seismic migration velocity analysis, SEG Technical Program Expanded Abstracts : 2542-2545. https://doi.org/10.1190/1.2148241 Plain-Language Summary PDF DownloadLoading ..." @default.
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