Reflection Full-waveform Inversion for Inaccurate Starting Models

PreviousNext No Access2015 Workshop: Depth Model Building: Full-waveform Inversion, Beijing, China, 18-19 June 2015Reflection Full-waveform Inversion for Inaccurate Starting ModelsAuthors: Abdullah AlTheyab*G. T. SchusterAbdullah AlTheyab*King Abdullah University of Science and Technology (KAUST)Search for more papers by this author and G. T. SchusterKing Abdullah University of Science and Technology (KAUST)Search for more papers by this authorhttps://doi.org/10.1190/FWI2015-005 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We propose a seismic-reflection full-waveform inversion (FWI) workflow to obtain a velocity model when the starting velocity model contains low-wavenumber errors. This workflow is based on Gauss-Seidel iterations where we apply Gauss-Newton FWI over a small subset of the seismic data. The subset is selected such that each subset invert a narrow range of the high-wavenumber components of the model space. The different subsets are inverted in sequence where the final model from inverting a subset is the starting model for the next subset. An under-relaxation operator is applied to the cumulative update from one pass of Gauss-Seidel iterations to accelerate convergence. The main advantage of the approach is that it enhances the low-wavenumber updates. Applications to synthetic and field data show significant low-wavenumber updates and flattening of common-image gathers after many iterations. Permalink: https://doi.org/10.1190/FWI2015-005FiguresReferencesRelatedDetailsCited byTarget-oriented waveform inversion based on Marchenko redatumed dataYuzhao Lin and Huaishan Liu11 January 2023 | GEOPHYSICS, Vol. 88, No. 1Multiscale Data-Driven Seismic Full-Waveform Inversion With Field Data StudyIEEE Transactions on Geoscience and Remote Sensing, Vol. 60Seismic inversion by Newtonian machine learningYuqing Chen and Gerard T. Schuster10 June 2020 | GEOPHYSICS, Vol. 85, No. 4Multiscale reflection phase inversion with migration deconvolutionYuqing Chen, Zongcai Feng, Lei Fu, Abdullah AlTheyab, Shihang Feng, and Gerard Schuster19 December 2019 | GEOPHYSICS, Vol. 85, No. 1Full unwrapped phase inversion in the phase spaceYuzhao Lin, Kai Zhang, Zhenchun Li, Renwei Din, and Zhennan Yu10 August 2019References16 June 2017 2015 Workshop: Depth Model Building: Full-waveform Inversion, Beijing, China, 18-19 June 2015ISSN (online):2159-6832Copyright: 2015 Pages: 161 publication data© 2015 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 19 Jun 2015 CITATION INFORMATION Abdullah AlTheyab* and G. T. Schuster, (2015), "Reflection Full-waveform Inversion for Inaccurate Starting Models," SEG Global Meeting Abstracts : 18-22. https://doi.org/10.1190/FWI2015-005 Plain-Language Summary PDF DownloadLoading ...