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• W2890700319 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2018Diagnosing Azimuthal Variations of Velocity Model Uncertainties using 3D DAS-VSP in GOMAuthors: Y. LiW. WongT. ChenK. KingH. WuY. LiShell International E & PSearch for more papers by this author, W. WongShell International E & PSearch for more papers by this author, T. ChenShell International E & PSearch for more papers by this author, K. KingShell E & PSearch for more papers by this author, and H. WuShell E & PSearch for more papers by this authorhttps://doi.org/10.1190/segam2018-w20-05.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract As Distributed Acoustic Sensing (DAS) systems advance, increasing amounts of 3D/4D DAS-VSP (vertical seismic profile) data are being acquired. These large amounts of DAS data are used to diagnose and update velocity models and improve the quality of sub-surface images from both borehole and surface seismic data. In this study, we developed a simple, robust, and practical tool to diagnose azimuthal variations of velocity model uncertainties using 3D DAS-VSP data. We use 2211 seismic shots on 8 rings centered at a receiver to calculate apparent velocities (Vapp) using an initial model (Mod) and an updated model after tomography (Tom). Relative misfits between observed and model calculated Vapp reveal azimuthal variation in velocity model uncertainties. Presentation Date: Start Time: Location: Presentation Type: Keywords: distributed acoustic sensing, 3D, 4D, VSPPermalink: https://doi.org/10.1190/segam2018-w20-05.1FiguresReferencesRelatedDetailsCited byDownhole Monitoring Using Distributed Acoustic Sensing: Fundamentals and Two Decades Deployment in Oil and Gas Industries21 March 2022A Literature Review10 December 2021 SEG Technical Program Expanded Abstracts 2018ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2018 Pages: 5520 publication data© 2018 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 27 Aug 2018 CITATION INFORMATION Y. Li, W. Wong, T. Chen, K. King, and H. Wu, (2018), Diagnosing Azimuthal Variations of Velocity Model Uncertainties using 3D DAS-VSP in GOM, SEG Technical Program Expanded Abstracts : 5511-5515. https://doi.org/10.1190/segam2018-w20-05.1 Plain-Language Summary Keywordsdistributed acoustic sensing3D4DVSPPDF DownloadLoading ..." @default.
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• W2890700319 title "Diagnosing Azimuthal Variations of Velocity Model Uncertainties using 3D DAS-VSP in GOM" @default.
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