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• W2318767609 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2012Integrated inversion of subsurface velocity structures using wave equation tomography and full waveform inversionAuthors: Haiyang WangSatish C. SinghHanchao JianHenri CalandraHaiyang WangIPGP, FranceSearch for more papers by this author, Satish C. SinghIPGP, FranceSearch for more papers by this author, Hanchao JianIPGP, FranceSearch for more papers by this author, and Henri CalandraTOTALSearch for more papers by this authorhttps://doi.org/10.1190/segam2012-0472.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We propose to use wave-equation tomography (WET) method to build long-wavelength velocity structure for full waveform inversion (FWI). In WET, full wavefield modeling is performed and cross-correlation time delay between the arrivals from synthetic and real waveforms is used as objective function. Adjoint method is used to calculate the gradient in each iteration efficiently. Since WET and FWI share similar inversion structure, we use a hybrid misfit function to combine the two methods as an integrated workflow that is able to estimate high-resolution structure from poor starting model. To stabilize WET and make it converge to global minimum, we precondition the time delay measures with maximum cross-correlation coefficients and perform adaptive scale smoothing to the gradients. By exploring the band-limited feature of seismic wavefield, WET can provide better resolution than ray-based travel time tomography, which is under high frequency approximation. To illustrate the advantage of wave-equation tomography, we show in a 2D synthetic test that WET provides subsurface information that is critical for successful FWI. We also test 2D Marmousi model and satisfactory inversion results are achieved without much manual manipulating. Permalink: https://doi.org/10.1190/segam2012-0472.1FiguresReferencesRelatedDetailsCited BySimultaneous inversion of the background velocity and the perturbation in full-waveform inversionZedong Wu and Tariq Alkhalifah2 September 2015 | GEOPHYSICS, Vol. 80, No. 6Inversion of seismic refraction and reflection data for building long-wavelength velocity modelsHaiyang Wang, Satish C. Singh, Francois Audebert, and Henri Calandra2 February 2015 | GEOPHYSICS, Vol. 80, No. 2Nonlinear scale separation and misfit configuration of envelope inversionJingrui Luo* and Ru-Shan Wu5 August 20143D plane-wave least-squares Kirchhoff migrationXin Wang, Wei Dai, Yunsong Huang, and Gerard T. Schuster5 August 2014An integrated inversion of seismic refraction and reflection data using combined wave-equation tomography and full waveform inversionHaiyang Wang, Satish C. Singh, and Henri Calandra19 August 2013 SEG Technical Program Expanded Abstracts 2012ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2012 Pages: 4609 Publisher:Society of Exploration Geophysicists HistoryPublished: 25 Oct 2012 CITATION INFORMATION Haiyang Wang, Satish C. Singh, Hanchao Jian, and Henri Calandra, (2012), Integrated inversion of subsurface velocity structures using wave equation tomography and full waveform inversion, SEG Technical Program Expanded Abstracts : 1-5. https://doi.org/10.1190/segam2012-0472.1 Plain-Language Summary PDF DownloadLoading ..." @default.
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• W2318767609 date "2012-09-01" @default.
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• W2318767609 title "Integrated inversion of subsurface velocity structures using wave equation tomography and full waveform inversion" @default.
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• W2318767609 doi "https://doi.org/10.1190/segam2012-0472.1" @default.
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