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• W2055479962 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2008Elastic interferometry for OBC data: Theory and examplesAuthors: J. E. GaiserI. VasconcelosC. Calderón‐MaciasJ. E. GaiserION Geophysical — GXT Imaging SolutionsSearch for more papers by this author, I. VasconcelosION Geophysical — GXT Imaging SolutionsSearch for more papers by this author, and C. Calderón‐MaciasION Geophysical — GXT Imaging SolutionsSearch for more papers by this authorhttps://doi.org/10.1190/1.3059110 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Elastic imaging from ocean bottom cable (OBC) data can be challenging because it requires the prior estimation of both P‐ and shear‐wave (S‐wave) velocity fields. Seismic interferometry is an attractive technique for processing OBC data because it performs model‐independent redatuming; retrieving “pseudo‐sources” at the positions of the receivers. The purpose of this study is to investigate multi‐component applications of interferometry for processing OBC data. This translates into using interferometry to retrieve pseudo‐source data on the sea bed containing not only PP‐, and PS‐wave reflections, but also SS‐wave reflections and sea‐bed surface waves (Scholte waves). We discuss perturbation‐based, elastic interferometry with synthetic and field OBC datasets. Conventional and perturbation‐based interferometry integrands computed from a synthetic are compared to show that the latter yields little acausal response and fewer artifacts. A 4C (Xx, Xz, Zx and Zz) pseudo‐source response retrieves pure‐mode SS‐reflections as well at PP‐ and PS‐reflections. Pseudo‐source responses observed in OBC data are related to P‐wave conversions at the seabed rather than to true horizontal or vertical point forces. From a Gulf of Mexico OBC dataset, principal components of a 9C pseudo‐source response demonstrate that Vp/Vs at the seabed is an important property for these conversions, particularly for generating pure‐mode SS‐wave reflections.Permalink: https://doi.org/10.1190/1.3059110FiguresReferencesRelatedDetailsCited ByResearch on vertical cable seismic interferometry imaging15 April 2022 | Marine Geophysical Research, Vol. 43, No. 2Opportunities and pitfalls in surface-wave interpretationGerard T. Schuster, Jing Li, Kai Lu, Ahmed Metwally, Abdullah AlTheyab, and Sherif Hanafy20 January 2017 | Interpretation, Vol. 5, No. 1Controlled‐source elastic interferometric imaging by multi‐dimensional deconvolution with downhole receivers below a complex overburdenJoost van der Neut, Kurang Mehta, Jan Thorbecke, and Kees Wapenaar21 October 2010Elastic‐wavefield interferometry using P‐wave source VSPs, Wamsutter field, WyomingJames E. Gaiser, Rosemarie Ramkhelawan, Ivan Vasconcelos, and John Faragher14 October 2009Generalized representations of perturbed fields — applications in seismic interferometry and migrationIvan Vasconcelos15 December 2008 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: 15 Dec 2008 CITATION INFORMATION J. E. Gaiser, I. Vasconcelos, and C. Calderón‐Macias, (2008), Elastic interferometry for OBC data: Theory and examples, SEG Technical Program Expanded Abstracts : 1073-1077. https://doi.org/10.1190/1.3059110 Plain-Language Summary PDF DownloadLoading ..." @default.
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