Three-dimensional viscoacoustic least-squares reverse time migration

PreviousNext No AccessInternational Geophysical Conference, Beijing, China, 24-27 April 2018Three-dimensional viscoacoustic least-squares reverse time migrationAuthors: Jinli LiYingming QuJianxun LiuZhenchun LiJinli LiChinese Academy of Geological Sciences Institute of Geophysical and Geochemical Exploration, Langfang, China, 065000, and The National Center for Geological Exploration Technology, Langfang, China, 065000Search for more papers by this author, Yingming QuChina University of Petroleum (East China), School of Geosciences, Qingdao, China, and SINOPEC Key Laboratory of Geophysics, Nanjing, China, 2111030Search for more papers by this author, Jianxun LiuChinese Academy of Geological Sciences Institute of Geophysical and Geochemical Exploration, Langfang, China, 065000, and The National Center for Geological Exploration Technology, Langfang, China, 065000Search for more papers by this author, and Zhenchun LiChina University of Petroleum (East China), School of Geosciences, Qingdao, China; 4. SINOPEC Key Laboratory of Geophysics, Nanjing, China, 2111030Search for more papers by this authorhttps://doi.org/10.1190/IGC2018-154 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract For the problem of viscous imaging and the advantage of least square reverse time migration (LSRTM), a viscoacoustic LSRTM method is proposed. The viscoacoustic least square migration operator, demigration operator and gradient formula are derived based on the viscoacoustic wave equation for the General Standard Linear Solid. A viscoacoustic adjoint operator is introduce to overcome the instability during the seismic wave back-propagation in the viscoacoustic media. The polar encoding technology is used to decrease the computational cost and memory storage of the viscoacoustic LSRTM, which can make it possible to be practical. Finally, the method is developed to propose a 3D a viscoacoustic LSRTM method. The test of the flat model and salt dome model with Q prove the accurate of the 3D viscoacoustic LSRTM. Keywords: 3D, least-squares, reverse time migrationPermalink: https://doi.org/10.1190/IGC2018-154FiguresReferencesRelatedDetails International Geophysical Conference, Beijing, China, 24-27 April 2018ISSN (online):2159-6832Copyright: 2018 Pages: 1821 publication data© 2018 Published in electronic format with permission by the Society of Exploration Geophysicists and Chinese Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished Online: 11 Dec 2018 CITATION INFORMATION Jinli Li, Yingming Qu, Jianxun Liu, and Zhenchun Li, (2018), "Three-dimensional viscoacoustic least-squares reverse time migration," SEG Global Meeting Abstracts : 628-631. https://doi.org/10.1190/IGC2018-154 Plain-Language Summary Keywords3Dleast-squaresreverse time migrationPDF DownloadLoading ...