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- W2324883451 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Phase variation with angle inversion using plane and spherical wavesAuthors: Xinfa ZhuGeorge McMechanXinfa ZhuUniversity of Texas at DallasSearch for more papers by this author and George McMechanUniversity of Texas at DallasSearch for more papers by this authorhttps://doi.org/10.1190/1.3627725 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Seismic reflection data from near‐ to post‐critical angles provide the potential of both velocity and density inversion. It is known that plane wave solutions are inapplicable near the critical angle. Spherical‐wave solutions have recently been considered to study the amplitude variation with offset (AVO). However, amplitude is difficult to extract reliably due to transmission losses. To overcome this, we propose to use the phase variation with angle (PVA) information for elastic parameter inversion. The modeling is by spherical‐wave reflection coefficients (SRCs). A linearized least‐squares scheme is used to invert the modeled PVA for density and three velocities across the reflector. Numerical tests indicate that a correct solution can be reached only when the models are consistent for both observed and predicted phases. A spherical‐wave model can produce a more accurate solution for real (spherical‐wave) data than a plane‐wave model can.Permalink: https://doi.org/10.1190/1.3627725FiguresReferencesRelatedDetailsCited ByInversion comparison using an elastic local solver to recover elastic parametersLigia Elena Jaimes-Osorio and Alison Malcolm1 September 2021Amplitude variation with offset inversion using acoustic-elastic local solverLigia Elena Jaimes-Osorio, Alison Malcolm, and Ali Gholami1 April 2020 | GEOPHYSICS, Vol. 85, No. 3Target-oriented linear least squares and nonlinear, trust-region Newton inversions of plane waves using AVA and PVA data for elastic model parametersTing Gong and George A. McMechan20 August 2016 | GEOPHYSICS, Vol. 81, No. 5Polarized wavefield magnitudes with optical flow for elastic angle-domain common-image gathersTing Gong, Bao D. Nguyen, and George A. McMechan31 May 2016 | GEOPHYSICS, Vol. 81, No. 4Excitation amplitude imaging condition for prestack reverse-time migrationBao D. Nguyen and George A. McMechan13 December 2012 | GEOPHYSICS, Vol. 78, No. 1AVO inversion using the Zoeppritz equation for PP reflectionsXinfa Zhu and George McMechan25 October 2012 SEG Technical Program Expanded Abstracts 2011ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2011 Pages: 4424 Publisher:Society of Exploration Geophysicists HistoryPublished: 25 May 2012 CITATION INFORMATION Xinfa Zhu and George McMechan, (2011), Phase variation with angle inversion using plane and spherical waves, SEG Technical Program Expanded Abstracts : 2565-2570. https://doi.org/10.1190/1.3627725 Plain-Language Summary PDF DownloadLoading ..." @default.
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