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• W2890998822 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2018Multicomponent and source-free converted-wave reverse time migration for VSPAuthors: Yue DuYunyue Elita LiJizhong YangArthur ChengXinding FangYue DuNational University of SingaporeSearch for more papers by this author, Yunyue Elita LiNational University of SingaporeSearch for more papers by this author, Jizhong YangNational University of SingaporeSearch for more papers by this author, Arthur ChengNational University of SingaporeSearch for more papers by this author, and Xinding FangSouthern University of Science and TechnologySearch for more papers by this authorhttps://doi.org/10.1190/segam2018-2994695.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract VSP has advantages to detect and monitor the objects around the borehole due to its geometry. Multicomponent VSP can add rich information about the elastic properties of the subsurface near wellbore. However, the elastic wave imaging has been challenging due to the complexities in wave physics. The uncertainties in near surface structure will also affect the image accuracy. In this abstract we utilize the elastic image conditions with scalar wave equations for VSP reverse-time migration (RTM) to image the complex structures. We also provide an alternative way of using the source-free convertedwave (SFCW) RTM imaging for VSP to avoid the complex overburden structures. With multiple numerical examples, the PP, PS and SFCW images demonstrate the ability to image the complex sediment layers around the wellbore. Using both PP and PS image can provide a good interpretation for the complex subsurface but they rely on a relatively correct velocity model. The SFCW image is target oriented and is robust for the complex overburden velocity issue, while it has a lack of illumination for the areas further away from the borehole. Presentation Date: Wednesday, October 17, 2018 Start Time: 8:30:00 AM Location: 212A (Anaheim Convention Center) Presentation Type: Oral Keywords: imaging, elastic, reverse time migrationPermalink: https://doi.org/10.1190/segam2018-2994695.1FiguresReferencesRelatedDetailsCited byA joint imaging method of vertical seismic profiling data by generalized radon transform migration28 April 2021 | Geophysical Prospecting, Vol. 69, No. 5Suppressing residual low-frequency noise in VSP reverse time migration by combining wavefield decomposition imaging condition with Poynting vector filtering6 October 2020 | Exploration Geophysics, Vol. 52, No. 2 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 Yue Du, Yunyue Elita Li, Jizhong Yang, Arthur Cheng, and Xinding Fang, (2018), Multicomponent and source-free converted-wave reverse time migration for VSP, SEG Technical Program Expanded Abstracts : 5372-5376. https://doi.org/10.1190/segam2018-2994695.1 Plain-Language Summary Keywordsimagingelasticreverse time migrationPDF DownloadLoading ..." @default.
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