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• W2315533596 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2009A new ray‐based offset‐to‐angle transform for anisotropic medium and its implication in the prestack waveform inversion of seismic dataAuthors: Pradip Kumar MuhhopadhyaySubhashis MallickPradip Kumar MuhhopadhyayDepartment of Geology and Geophysics and the School of Energy Resources, University of Wyoming, Laramie WY 82071.Search for more papers by this author and Subhashis MallickDepartment of Geology and Geophysics and the School of Energy Resources, University of Wyoming, Laramie WY 82071.Search for more papers by this authorhttps://doi.org/10.1190/1.3255527 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We present a ray‐based approach to convert offset domain prestack seismic data into angles. From any given time sample, we ray‐trace through the medium to the corresponding source and receiver locations and compute the ray‐path length, travel time, offset, and the angle mute for a given angle. We then search for the offset traces that are within the angle mute, locally fit a polynomial to obtain the times corresponding to those offsets and partially stack those offset trace samples to obtain the corresponding zero‐offset angle domain response. It is straightforward to compute both primary (P‐P) and converted wave (P‐S) angle gathers using this approach. Although we present our method for a horizontally stratified VTI medium, it can be easily extended to arbitrarily anisotropic dipping layers. Computing theoretical offset domain seismograms for a variety of models and converting them to angles, we verify that we are able to extract accurate response out to large angles. Our new ray‐based transform will be useful for AVO/AVA analysis. In addition, it will also be useful for computing accurate angle gathers from observed seismic data and iteratively matching them with synthetic angle gathers in a prestack single or multicomponent waveform inversion for dipping anisotropic medium.Permalink: https://doi.org/10.1190/1.3255527FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2009ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2009 Pages: 4338 publication data© 2009 Copyright © 2009 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 14 Oct 2009 CITATION INFORMATION Pradip Kumar Muhhopadhyay and Subhashis Mallick, (2009), A new ray‐based offset‐to‐angle transform for anisotropic medium and its implication in the prestack waveform inversion of seismic data, SEG Technical Program Expanded Abstracts : 321-325. https://doi.org/10.1190/1.3255527 Plain-Language Summary PDF DownloadLoading ..." @default.
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