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• W2511374230 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2016An efficient q-RTM algorithm based on local differentiation operatorsAuthors: Wenyi HuTong ZhouJieyuan NingWenyi HuAGTSearch for more papers by this author, Tong ZhouPeking UniversitySearch for more papers by this author, and Jieyuan NingPeking UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2016-13843920.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Under visco-acoustic overburdens such as gas cloud or gas chimney, the quality of images produced by conventional reverse time migration (RTM) can be severely degraded due to the amplitude reduction, phase distortion, traveltime error, and frequency content loss caused by attenuation. In this work, we developed a novel Q-RTM algorithm to efficiently compensate the amplitude loss and correct the phase distortion when finite Q is in presence. Unlike the currently available Q-RTM algorithms based on global operators (pseudo-spectral methods), our Q-RTM approach employs a local differentiation operator (finite-difference) to significantly accelerate the Q compensation computation during wave propagation. Although finite-difference is the most commonly used algorithm for conventional RTM methods, there is no existing finite-difference-based Q-RTM algorithm due to two main challenges: stability issue and dispersion relation compensation using local differentiation operators. We overcome these difficulties by introducing two unique techniques: 1) the negative-τ method for the system stabilization; 2) a multi-stage dispersion optimization algorithm for the phase correction. The numerical examples demonstrate that our Q-RTM algorithm accurately compensates both the phase and the amplitude, while substantially reducing the computational cost, especially for large scale 3D projects. Presentation Date: Monday, October 17, 2016 Start Time: 4:35:00 PM Location: 171/173 Presentation Type: ORAL Keywords: migration, reverse-time, wave equation, Q, finite differencePermalink: https://doi.org/10.1190/segam2016-13843920.1FiguresReferencesRelatedDetailsCited byModeling of pure visco-qP-wave propagation in attenuating tilted transversely isotropic media based on decoupled fractional LaplaciansXinru Mu, Jianping Huang, Jidong Yang, Jianfeng Zhang, and Zhiliang Wang18 May 2022 | GEOPHYSICS, Vol. 87, No. 4Attenuation compensation for wavefield‐separation‐based least‐squares reverse time migration in viscoelastic media15 December 2021 | Geophysical Prospecting, Vol. 70, No. 2Broadband finite-difference Q-compensated reverse time migration algorithm for tilted transverse isotropic mediaTong Zhou, Wenyi Hu, and Jieyuan Ning26 June 2020 | GEOPHYSICS, Vol. 85, No. 5Broadband finite-difference Q-compensation engine for accurate Q-RTMTong Zhou, Wenyi Hu, and Jieyuan Ning10 August 2019A stable and efficient approach of Q reverse time migrationYan Zhao, Ningbo Mao, and Zhiming Ren7 November 2018 | GEOPHYSICS, Vol. 83, No. 6An efficient local operator-based Q-compensated reverse time migration algorithm with multistage optimizationTong Zhou, Wenyi Hu, and Jieyuan Ning12 March 2018 | GEOPHYSICS, Vol. 83, No. 3Efficient Q RTM in transversely isotropic mediaWenyi Hu, Tong Zhou, and Jieyuan Ning17 August 2017Seismic Processing: Migration II Complete Session17 August 2017 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 Wenyi Hu, Tong Zhou, and Jieyuan Ning, (2016), An efficient q-RTM algorithm based on local differentiation operators, SEG Technical Program Expanded Abstracts : 4183-4187. https://doi.org/10.1190/segam2016-13843920.1 Plain-Language Summary Keywordsmigrationreverse-timewave equationQfinite differencePDF DownloadLoading ..." @default.
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