The Anisotropic Prestack Depth Migration in Deepwater Rough Bottom Area

PreviousNext No AccessBeijing 2014 International Geophysical Conference & Exposition, Beijing, China, 21-24 April 2014The Anisotropic Prestack Depth Migration in Deepwater Rough Bottom AreaAuthors: Ziqiang Xu*Zhongyu FangZhiwei DanBei PanChengguo CaiZiqiang Xu*CNOOC Energy Technology & Services - Development & Prospecting Geophysical Co. Zhanjiang 524057, ChinaSearch for more papers by this author, Zhongyu FangCNOOC Energy Technology & Services - Development & Prospecting Geophysical Co. Zhanjiang 524057, ChinaSearch for more papers by this author, Zhiwei DanCNOOC Energy Technology & Services - Development & Prospecting Geophysical Co. Zhanjiang 524057, ChinaSearch for more papers by this author, Bei PanChina University of Geosciences, Wuhan 430074, ChinaSearch for more papers by this author, and Chengguo CaiChina University of Geosciences, Wuhan 430074, ChinaSearch for more papers by this authorhttps://doi.org/10.1190/IGCBeijing2014-108 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract In deepwater exploration, isotropic prestack migration yields inaccurate image with large depth error and non-flatness of the image gathers at far offsets due to the anisotropy of the subsurface rock. Thus, anisotropic prestack depth migration (PSDM) is needed to image subsurface structures. In this paper, we investigated the application of kriging interpolation with external drift to estimate the velocity. Then, we discussed the method to update velocity and to calculate the anisotropic parameters, migration parameters and travel time. Anisotropic prestack depth migration sections in deepwater area in South China Sea show considerable improvements in subsurface image. The contort and distortion are restored. Besides, true layer structures are obtained, and the concidence of image and log data are improved. Keywords: deepwater, prestack, time migrationPermalink: https://doi.org/10.1190/IGCBeijing2014-108FiguresReferencesRelatedDetails Beijing 2014 International Geophysical Conference & Exposition, Beijing, China, 21-24 April 2014ISSN (online):2159-6832Copyright: 2014 Pages: 1360 publication data© 2014 Published in electronic format with permission by the Society of Exploration Geophysicists and Chinese Petroleum SocietyPublisher:Society of Exploration Geophysicists HistoryPublished: 24 Apr 2014 CITATION INFORMATION Ziqiang Xu*, Zhongyu Fang, Zhiwei Dan, Bei Pan, and Chengguo Cai, (2014), "The Anisotropic Prestack Depth Migration in Deepwater Rough Bottom Area," SEG Global Meeting Abstracts : 419-422. https://doi.org/10.1190/IGCBeijing2014-108 Plain-Language Summary Keywordsdeepwaterprestacktime migrationPDF DownloadLoading ...