Surface-related Multiple Wave Imaging of Marine Walkaway VSP Data

PreviousNext No AccessSEG 2020 Workshop: 2nd SEG Borehole Geophysics Workshop, Virtual, 26–27 November 2020Surface-related multiple wave imaging of marine Walkaway VSP dataAuthors: Jianguo LiJianhua HuangJunjun WuYanhua WangJianguo LiOptical Science and Technology (Chengdu) Ltd. CNPCBGP Inc., CNPCSearch for more papers by this author, Jianhua HuangOptical Science and Technology (Chengdu) Ltd. CNPCBGP Inc., CNPCSearch for more papers by this author, Junjun WuOptical Science and Technology (Chengdu) Ltd. CNPCSearch for more papers by this author, and Yanhua WangBGP Inc., CNPCSearch for more papers by this authorhttps://doi.org/10.1190/bhgp2020-34.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Walkaway VSP and 3D VSP are usually utilizing the upgoing reflected p-wave imaging to solve the geological tasks such as borehole side structure and reservoir research. The surface-related multiples are usually attenuated as the interference wave. Compared with the upgoing reflection, the surface-related multiple is featured with legibility, wide illumination, small angle of reflection, and long propagation path. Based on the Walkaway VSP data from a well on the sea, we research the pre-stack depth migration imaging of surface-related multiple, with major technical thread as follows. Firstly, arrange the Walkaway VSP data of Z component into a common receiver point gather. Secondly, extrapolate the source wavelet from the receiver point to the free surface using ω − x field explicit one-way wave operator according to the reciprocity principle of shot-point and receiver-point. Thirdly, extrapolate the common receiver point wave field and source wave field respectively from the free surface, using the related imaging conditions to extract the imaging value, to realize pre-stack depth migration. The test via model and example showed that the proposed method realize accurate imaging. Keywords: imaging, marine, P-wave, depth migration, algorithmPermalink: https://doi.org/10.1190/bhgp2020-34.1FiguresReferencesRelatedDetails SEG 2020 Workshop: 2nd SEG Borehole Geophysics Workshop, Virtual, 26–27 November 2020ISSN (online):2159-6832Copyright: 2020 Pages: 167 publication data© 2020 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 30 Dec 2020 CITATION INFORMATION Jianguo Li, Jianhua Huang, Junjun Wu, and Yanhua Wang, (2020), "Surface-related multiple wave imaging of marine Walkaway VSP data," SEG Global Meeting Abstracts : 125-129. https://doi.org/10.1190/bhgp2020-34.1 Plain-Language Summary KeywordsimagingmarineP-wavedepth migrationalgorithmPDF DownloadLoading ...