Q-compensated reverse time migration and least-square reverse time migration methods

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2018Q-compensated reverse time migration and least-square reverse time migration methodsAuthors: Enjiang WangJing BaEnjiang WangSchool of Earth Sciences and Engineering, Hohai UniversitySearch for more papers by this author and Jing BaSchool of Earth Sciences and Engineering, Hohai UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2018-2996850.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The viscosity in the subsurface will affect the amplitude and phase of the propagating wavefields, thus will significantly influence the imaging results. In this paper, starting from the exact viscous acoustic dispersion relation in the framework of the standard linear solid (SLS) body theory, we firstly derive the viscous acoustic equation that definitely separates the amplitude attenuation and phase distortion effects. The Q-compensated reverse time migration (RTM) and least square RTM (LSRTM) methods based on this equation are further developed. The instability problem is effectively solved by adding the regularization operator, which introduces tiny extra computational time. The examples demonstrate that the Q-compensated RTM method can effectively recover the attenuated energy and achieve similar result as the acoustic RTM on acoustic data. The Q-compensated LSRTM method can significantly improve the resolution of Q-compensated RTM result at both shallow and deep layers, and obtain much clearer image. Presentation Date: Wednesday, October 17, 2018 Start Time: 1:50:00 PM Location: Poster Station 20 Presentation Type: Poster Keywords: least-squares migration, reverse time migration, Q, attenuation, imagingPermalink: https://doi.org/10.1190/segam2018-2996850.1FiguresReferencesRelatedDetailsCited byAmplitude anisotropy of shear-wave splitting and fluid detection in thin-layer reservoir22 October 2019 | Acta Geophysica, Vol. 67, No. 6 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 Enjiang Wang and Jing Ba, (2018), "Q-compensated reverse time migration and least-square reverse time migration methods," SEG Technical Program Expanded Abstracts : 4503-4507. https://doi.org/10.1190/segam2018-2996850.1 Plain-Language Summary Keywordsleast-squares migrationreverse time migrationQattenuationimagingPDF DownloadLoading ...