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- W2317231644 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2014Full wavefield migration to image salt-flanks using an unblended and blended VSP dataAuthors: Alok K. Soni*Eric VerschuurMikhail DavydenkoAlok K. Soni*Delft U of TechnologySearch for more papers by this author, Eric VerschuurDelft U of TechnologySearch for more papers by this author, and Mikhail DavydenkoDelft U of TechnologySearch for more papers by this authorhttps://doi.org/10.1190/segam2014-1032.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Imaging of steeply-dipping or overturned salt-flanks is still a challenge for the conventional migration techniques applied to surface seismic data. In the past, walkaway Vertical Seismic Profiling (VSP) data has proven to add value in mapping or imaging the steep salt-boundaries. Henceforth, many approaches were discussed in the past, such as imaging the turning waves through horizontal wavefield extrapolation, imaging P-S transmitted wavefields in the VSP data, etc. In this paper, we discuss an extension of the Full Wavefield Migration (FWM) scheme to image salt-flanks using the turning waves in VSP data. FWM is an inversion-based imaging algorithm, that utilizes all the multiples (surface and internal multiples) in the observed unblended or blended VSP data to explain the subsurface reflectivity. The extended FWM uses both vertical and horizontal wavefield extrapolation in the imaging scheme and, therefore, is able to image complex and steep-dip structures. We discuss the forward modelling and inversion scheme, followed by some numerical examples to illustrate the imaging of steep structures. These examples involve both unblended and blended VSP experiments, and also illustrate the effect of near-surface scatterers in the imaging of salt-flanks. Keywords: borehole geophysics, illumination, imaging, multiples, saltPermalink: https://doi.org/10.1190/segam2014-1032.1FiguresReferencesRelatedDetailsCited ByImaging blended vertical seismic profiling data using full-wavefield migration in the common-receiver domainA. K. Soni and D. J. Verschuur27 April 2015 | GEOPHYSICS, Vol. 80, No. 3 SEG Technical Program Expanded Abstracts 2014ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2014 Pages: 5183 publication data© 2014 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 05 Aug 2014 CITATION INFORMATION Alok K. Soni*, Eric Verschuur, and Mikhail Davydenko, (2014), Full wavefield migration to image salt-flanks using an unblended and blended VSP data, SEG Technical Program Expanded Abstracts : 5085-5091. https://doi.org/10.1190/segam2014-1032.1 Plain-Language Summary Keywordsborehole geophysicsilluminationimagingmultiplessaltPDF DownloadLoading ..." @default.
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- W2317231644 title "Full wavefield migration to image salt-flanks using an unblended and blended VSP data" @default.
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