Time migration velocity analysis by image‐wave propagation of common‐image gathers

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2008Time migration velocity analysis by image‐wave propagation of common‐image gathersAuthors: J. SchleicherJ. C. CostaA. NovaisJ. SchleicherUnicampSearch for more papers by this author, J. C. CostaUFPASearch for more papers by this author, and A. NovaisUnicampSearch for more papers by this authorhttps://doi.org/10.1190/1.3063997 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Image‐wave propagation in the common‐image gather (CIG) domain can be combined with residual‐moveout analysis for iterative migration velocity analysis. This leads to a detection of those velocities where events flatten. The procedure can be applied in inhomogeneous media. For this purpose, the CIGs obtained by migration with an inhomogeneous macrovelocity model are continued starting from a constant reference velocity. The interpretation of continued CIGs as obtained from residual migrations leads to a correction formula that translates the residual flattening velocities into absolute time‐migration velocities. In this way, the migration velocity model can be iteratively improved until a satisfactory result is reached. By means of a numerical example, we show that migration velocity analysis with iterative image continuation is able to construct a migration velocity model from scratch.Permalink: https://doi.org/10.1190/1.3063997FiguresReferencesRelatedDetailsCited byAutomatic migration velocity analysis via deep learningChao Ding and Jianwei Ma7 June 2022 | GEOPHYSICS, Vol. 87, No. 4Reverse time migration (RTM) imaging of iron oxide deposits in the Ludvika mining area, Sweden2 August 2021 | Solid Earth, Vol. 12, No. 8 SEG Technical Program Expanded Abstracts 2008ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2008 Pages: 3713 publication data© 2008 Copyright © 2008 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 15 Dec 2008 CITATION INFORMATION J. Schleicher, J. C. Costa, and A. Novais, (2008), "Time migration velocity analysis by image‐wave propagation of common‐image gathers," SEG Technical Program Expanded Abstracts : 3133-3137. https://doi.org/10.1190/1.3063997 Plain-Language Summary PDF DownloadLoading ...