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• W2517687775 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2016Q-compensated full-waveform inversion using constant-Q wave equationAuthors: Zhiguang XueTieyuan ZhuSergey FomelJunzhe SunZhiguang XueUniversity of Texas—AustinSearch for more papers by this author, Tieyuan ZhuUniversity of Texas—AustinSearch for more papers by this author, Sergey FomelUniversity of Texas—AustinSearch for more papers by this author, and Junzhe SunUniversity of Texas—AustinSearch for more papers by this authorhttps://doi.org/10.1190/segam2016-13949307.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The gradient in time-domain full waveform inversion (FWI) is usually constructed by taking the cross-correlation of the forward propagated source wavefield and the back propagated data residual wavefield at each time step. In the real Earth, propagating waves can be attenuated due to the anelatic nature of subsurface media, which results in an attenuated gradient for FWI. Replacing the attenuated true gradient with a Q-compensated gradient can accelerate the convergence rate of the inversion process. We propose to use phase-dispersion and amplitude-loss decoupled constant-Q wave equation to formulate a visco-acoustic FWI, and use this wave equation to generate a Q-compensated gradient, which has the recovered amplitude while preserving the correct kinematics. We construct an exact adjoint operator in the discretized form using the lowrank wave extrapolation technique, and implement the gradient compensation by reversing the sign of the amplitude-loss term in both forward and adjoint operators. This leads to a Q-dependent gradient preconditioning method. Numerical tests with synthetic data demonstrate that the visco-acoustic FWI using constant-Q wave equation is capable of producing high-quality velocity models, and that the proposed Q-compensated gradient can accelerate its convergence rate. Presentation Date: Monday, October 17, 2016 Start Time: 1:25:00 PM Location: 162/164 Presentation Type: ORAL Keywords: attenuation, nonlinear, Q, low frequency, full-waveform inversionPermalink: https://doi.org/10.1190/segam2016-13949307.1FiguresReferencesRelatedDetailsCited byModeling of scattering losses using energy transportManuel Alejandro Jaimes Caballero and Roel Snieder15 August 2022Source‐independent waveform inversion for attenuation estimation in anisotropic media24 June 2019 | Geophysical Prospecting, Vol. 67, No. 9Q-compensated reverse time migration in viscoacoustic media including surface topographyYingming Qu and Jinli Li26 April 2019 | GEOPHYSICS, Vol. 84, No. 4Q full-waveform inversion based on the viscoacoustic equation10 May 2019 | Applied Geophysics, Vol. 16, No. 1The Interpolation of Sparse Geophysical Data27 September 2018 | Surveys in Geophysics, Vol. 40, No. 1Addressing viscous effects in acoustic full-waveform inversionÒscar Calderón Agudo, Nuno Vieira da Silva, Michael Warner, Tatiana Kalinicheva, and Joanna Morgan1 October 2018 | GEOPHYSICS, Vol. 83, No. 6Signal-Preserving Erratic Noise Attenuation via Iterative Robust Sparsity-Promoting FilterIEEE Transactions on Geoscience and Remote Sensing, Vol. 56, No. 6Q-model building using one-way wave-equation migration Q analysis — Part 1: Theory and synthetic testYi Shen, Biondo Biondi, and Robert Clapp22 December 2017 | GEOPHYSICS, Vol. 83, No. 2Adaptive stabilization for Q-compensated reverse time migrationYufeng Wang, Hui Zhou, Hanming Chen, and Yangkang Chen14 November 2017 | GEOPHYSICS, Vol. 83, No. 1Estimating velocity and Q by fractional Laplacian constant-Q wave equation-based full-waveform inversionHanming Chen and Hui Zhou17 August 2017Waveform inversion of synthetic reflection data for VTI attenuation parametersTong Bai, Ilya Tsvankin, and Xinming Wu17 August 2017Anisotropy Complete Session17 August 2017Full-Waveform Inversion II Complete Session17 August 2017Waveform inversion for attenuation estimation in anisotropic mediaTong Bai, Ilya Tsvankin, and Xinming Wu19 June 2017 | GEOPHYSICS, Vol. 82, No. 4Numerical simulation of seismic wave propagation in viscoelastic-anisotropic media using frequency-independent Q wave equationTieyuan Zhu21 April 2017 | GEOPHYSICS, Vol. 82, No. 4Viscoelastic reverse time migration with attenuation compensationTieyuan Zhu and Junzhe Sun24 January 2017 | GEOPHYSICS, Vol. 82, No. 2 SEG Technical Program Expanded Abstracts 2016ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2016 Pages: 5654 publication data© 2016 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 01 Sep 2016 CITATION INFORMATION Zhiguang Xue, Tieyuan Zhu, Sergey Fomel, and Junzhe Sun, (2016), Q-compensated full-waveform inversion using constant-Q wave equation, SEG Technical Program Expanded Abstracts : 1063-1068. https://doi.org/10.1190/segam2016-13949307.1 Plain-Language Summary KeywordsattenuationnonlinearQlow frequencyfull-waveform inversionPDF DownloadLoading ..." @default.
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