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- W2320611731 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2013Estimating Vp/Vs ratios using smooth dynamic image warpingAuthors: Stefan ComptonDave HaleStefan ComptonCenter for Wave Phenomena, Colorado School of MinesSearch for more papers by this author and Dave HaleCenter for Wave Phenomena, Colorado School of MinesSearch for more papers by this authorhttps://doi.org/10.1190/segam2013-1300.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Interval Vp/Vs ratios can be estimated from derivatives of vertical shifts that align reflections in PP and PS images. This alignment, however, is nontrivial because features in PS images are not simply time-shifted versions of features in PP images. To align PP and PS images we use a smooth dynamic image warping algorithm that can be accurate with respect to problems unrelated to time shifts, such as differences in noise and reflection waveforms. To optimize accuracy of estimated time shifts and Vp/Vs ratios, we automatically construct a coarse lattice of points located on reflections with high amplitudes, and then estimate time shifts at only those points. By adjusting the coarseness of the lattice, we trade off resolution of changes in Vp/Vs with increased accuracy in Vp/Vs estimates. By processing 3D PP and PS images we learned that our estimates of Vp/Vs cannot be obtained by simply smoothing estimates obtained using other methods. Permalink: https://doi.org/10.1190/segam2013-1300.1FiguresReferencesRelatedDetailsCited ByElastic wavefield tomography with physical model constraintsYuting Duan and Paul Sava19 August 2015Wavelets and warping PS seismic imagesChris Graziano* and Dave Hale5 August 2014 SEG Technical Program Expanded Abstracts 2013ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2013 Pages: 5258 Publisher:Society of Exploration Geophysicists HistoryPublished: 19 Aug 2013 CITATION INFORMATION Stefan Compton and Dave Hale, (2013), Estimating Vp/Vs ratios using smooth dynamic image warping, SEG Technical Program Expanded Abstracts : 1639-1643. https://doi.org/10.1190/segam2013-1300.1 Plain-Language Summary PDF DownloadLoading ..." @default.
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