Two‐dimensional acoustic anisotropic (VTI) full waveform inversion: The Valhall case study

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Two‐dimensional acoustic anisotropic (VTI) full waveform inversion: The Valhall case studyAuthors: Y. GholamiR. BrossierS. OpertoV. PrieuxA. RibodettiJ. VirieuxY. GholamiGéoazur ‐ CNRS ‐ University Nice Sophia‐AntipolisSearch for more papers by this author, R. BrossierISTerre ‐ University Joseph FourierSearch for more papers by this author, S. OpertoGéoazur ‐ CNRS ‐ University Nice Sophia‐AntipolisSearch for more papers by this author, V. PrieuxGéoazur ‐ CNRS ‐ University Nice Sophia‐AntipolisSearch for more papers by this author, A. RibodettiGéoazur ‐ CNRS ‐ University Nice Sophia‐AntipolisSearch for more papers by this author, and J. VirieuxISTerre ‐ University Joseph FourierSearch for more papers by this authorhttps://doi.org/10.1190/1.3627720 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Anisotropy can have a significant footprint in seismic imaging from surface wide‐aperture data, because of the difference between vertical and horizontal velocities in vertical transversely isotropic (VTI) media. A key issue in anisotropic full waveform inversion (FWI) is to define a suitable parametrization of the subsurface model, and the number of parameter classes that can be reliably reconstructed for the chosen parametrization. We address this issue with an application of frequency‐domain acoustic isotropic/anisotropic FWI to real surface wide‐aperture data recorded by an ocean bottom cable in the Valhall field. Isotropic FWI results show that the horizontal velocity is mainly reconstructed in the upper structure, dominantly constrained by diving waves and supercritical reflections. This can lead to depth stretching and/or overestimated velocity perturbations in the deep velocity structure, mainly controlled by short‐aperture reflections. Monoparameter anisotropic FWI shows a reliable reconstruction of either the vertical, the horizontal or the NMO velocity, when the model is parametrized by one wave speed and the Thomsen's parameters δ and ε. For such mono‐parameter FWI, the smooth δ and ε background models are kept constant during FWI iterations. Alternatively, the vertical and the horizontal velocities can be jointly reconstructed by multiparameter FWI, when the subsurface model is parametrized by the two wave speeds and δ, this latter is kept fixed during FWI iterations.Permalink: https://doi.org/10.1190/1.3627720FiguresReferencesRelatedDetailsCited ByAcoustic-elastic coupled equations in vertical transverse isotropic media for pseudoacoustic-wave reverse time migration of ocean-bottom 4C seismic dataPengfei Yu and Jianhua Geng28 May 2019 | GEOPHYSICS, Vol. 84, No. 4Feasibility of waveform inversion in acoustic orthorhombic mediaHui Wang and Ilya Tsvankin1 September 2016Anisotropy and AVO Complete Session1 September 2016Elastic full-waveform inversion for VTI media: Methodology and sensitivity analysisNishant Kamath and Ilya Tsvankin18 March 2016 | GEOPHYSICS, Vol. 81, No. 2Detecting and estimating anisotropy errors using full waveform inversion and ray-based tomography: A case study using long-offset acquisition in the Gulf of MexicoSabaresan Mothi* and Ravi Kumar5 August 2014Elastic full-waveform inversion of transmission data in 2D VTI mediaNishant Kamath and Ilya Tsvankin5 August 2014Full-waveform inversion of multicomponent data for horizontally layered VTI mediaNishant Kamath and Ilya Tsvankin25 July 2013 | GEOPHYSICS, Vol. 78, No. 5Inversion of refractions and reflections by full-waveform inversion for marine streamer data: Classification of problem types and solution methodsSteve Kelly, Jaime Ramos-Martinez, Kathy Zou, and Boris Tsimelzon3 September 2013 | The Leading Edge, Vol. 32, No. 9Full Waveform Inversion and the Truncated Newton MethodSIAM Journal on Scientific Computing, Vol. 35, No. 2Early-arrival waveform inversion for near-surface velocity and anisotropic parameter: Parametrization studyXukai Shen25 October 2012VTI Waveform Inversion with Practical Strategies: Application to 3D Real DataChao Wang, David Yingst, Robert Bloor, and Jacques Leveille25 October 2012Full-waveform inversion of multicomponent data for layered VTI mediaNishant Kamath and Ilya Tsvankin25 October 2012Acoustic VTI full waveform inversion: Sensitivity analysis and realistic synthetic examplesY. Gholami, R. Brossier, Stéphane Operto, A. Ribodetti, and Jean Virieux25 May 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 Y. Gholami, R. Brossier, S. Operto, V. Prieux, A. Ribodetti, and J. Virieux, (2011), "Two‐dimensional acoustic anisotropic (VTI) full waveform inversion: The Valhall case study," SEG Technical Program Expanded Abstracts : 2543-2548. https://doi.org/10.1190/1.3627720 Plain-Language Summary PDF DownloadLoading ...