Pre-stack Depth Migration Imaging of Walkaway VSP Surface-related Multiple-A Case Study

PreviousNext No AccessSEG 2018 Workshop: SEG Seismic Imaging Workshop, Beijing, China, 12–14 November 2018Pre-stack Depth Migration Imaging of Walkaway VSP Surface-related Multiple-A Case StudyAuthors: Jianguo LiXiaolu ZhangPengfei ZhangShize WangJianguo LiBGP Inc., CNPCSearch for more papers by this author, Xiaolu ZhangBGP Inc., CNPCSearch for more papers by this author, Pengfei ZhangBGP Inc., CNPCSearch for more papers by this author, and Shize WangBGP Inc., CNPCSearch for more papers by this authorhttps://doi.org/10.1190/SEIM2018-14.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Extensively applied to the domain of oil and gas exploration and development, Walkaway VSP and 3D VSP are usually utilizing the upgoing reflected p-wave imaging to solve the geological tasks such as side borehold construction and reservoir research, etc. The surface-related multiple as the interference wave is attenuated. 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 for a well on the sea, the paper studies the pre-stack depth migration imaging of surface-related multiple, with major technical thread as follows: arranging the Walkaway VSP common-source point gather of Z component into a common receiver point gather, extrapolating 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, then extrapolating 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, so it can be popularized into pre-stack depth migration imaging of multi-order surface-related multiple and other types of multiple. Keywords: migration, imaging, VSPPermalink: https://doi.org/10.1190/SEIM2018-14.1FiguresReferencesRelatedDetails SEG 2018 Workshop: SEG Seismic Imaging Workshop, Beijing, China, 12–14 November 2018ISSN (online):2159-6832Copyright: 2019 Pages: 115 publication data© 2018 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 05 Jun 2019 CITATION INFORMATION Jianguo Li, Xiaolu Zhang, Pengfei Zhang, and Shize Wang, (2019), "Pre-stack Depth Migration Imaging of Walkaway VSP Surface-related Multiple-A Case Study," SEG Global Meeting Abstracts : 56-59. https://doi.org/10.1190/SEIM2018-14.1 Plain-Language Summary KeywordsmigrationimagingVSPPDF DownloadLoading ...