Inversion velocity analysis via approximate born inversion

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2016Inversion velocity analysis via approximate born inversionAuthors: Jie HouWilliam SymesJie HouRice UniversitySearch for more papers by this author and William SymesRice UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2016-13950424.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Optimization-based Migration Velocity Analysis (MVA) updates long wavelength velocity information by minimizing an objective function that measures the violation of a semblance condition, applied to an image volume. Differential Semblance Optimization (DSO) forms a smooth objective function both in velocity and data, regardless of the data frequency content. Depending on how the image volume is formed, however, the objective function may not be minimized at a kinematically correct velocity, a phenomenon characterized in the literature (somewhat inaccurately) as “gradient artifacts”. In this paper, we will show that the root of this pathology is imperfect image volume formation resulting from various forms of migration, and that the use of linearized inversion (least squares migration) more or less eliminates it. We demonstrate that an approximate inverse operator, little more expensive than RTM, leads to recovery of a kinematically correct velocity. Presentation Date: Wednesday, October 19, 2016 Start Time: 8:25:00 AM Location: 142 Presentation Type: ORAL Keywords: acoustic, estimation, inversion, velocityPermalink: https://doi.org/10.1190/segam2016-13950424.1FiguresReferencesRelatedDetailsCited byA robust migration velocity analysis through an asymptotic inverse via generalised Radon transform4 February 2021 | Exploration Geophysics, Vol. 52, No. 6Coupling direct inversion to common-shot image-domain velocity analysisYubing Li and Hervé Chauris28 August 2018 | GEOPHYSICS, Vol. 83, No. 5Toward a stable iterative migration velocity analysis schemeEmmanuel Cocher, Hervé Chauris, and René-Édouard Plessix21 August 2018 | GEOPHYSICS, Vol. 83, No. 5Full traveltime inversion: Field data applicationsYue Ma, Yan Wu, Tong Fei, and Yi Luo17 August 2017Low-frequency reflection-data augmentation using gap-filling and gap-reduction methodMengyao Ji, Donald Kouri, and Anne-Cecile Lesage17 August 2017AVO and Seismic Inversion I Complete Session17 August 2017Seismic Velocity Estimation Complete Session17 August 2017Reflection full traveltime inversion in the image domainYan Wu*, Yue Ma, Yujin Liu, and Yi Luo31 May 2017 SEG Technical Program Expanded Abstracts 2016ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2016 Pages: 5654 publication data© 2016 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 01 Sep 2016 CITATION INFORMATION Jie Hou and William Symes, (2016), "Inversion velocity analysis via approximate born inversion," SEG Technical Program Expanded Abstracts : 5274-5279. https://doi.org/10.1190/segam2016-13950424.1 Plain-Language Summary KeywordsacousticestimationinversionvelocityPDF DownloadLoading ...