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• W2890112497 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 20189-C seismic VVAZ in HTI media: A synthetic study on the Niobrara ReservoirAuthors: Samara OmarJim SimmonsSamara OmarColorado School of MinesSearch for more papers by this author and Jim SimmonsColorado School of MinesSearch for more papers by this authorhttps://doi.org/10.1190/segam2018-2998010.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractAzimuthal anisotropy associated with horizontally transverse isotropic media (HTI) causes waves to propagate with different velocities in different azimuthal directions. Compressional (P-wave) velocity variation with azimuth (VVAZ) occurs only at the far offsets and is less sensitive to thin anisotropic layers. The converted and shear wave VVAZ is complementary to the P-wave response and are more sensitive to azimuthal anisotropy at all offsets. In addition to reducing the ambiguity of a single P-wave interpretation, the converted (C-wave) and shear (S-wave) components show measurable differences in the VVAZ response with changing thickness of the HTI medium.This added value of 9-C data is evidenced by reflectivity modeling of simple Niobrara stratigraphy with varying thicknesses of the HTI interval. Observations are made on common-offset, common-azimuth gathers and limited azimuth stacks for data rotated into the radial-transverse coordinate system.Presentation Date: Tuesday, October 16, 2018Start Time: 8:30:00 AMLocation: 213A (Anaheim Convention Center)Presentation Type: OralKeywords: multicomponent, anisotropy, fractures, modeling, shear wave (S-wave)Permalink: https://doi.org/10.1190/segam2018-2998010.1FiguresReferencesRelatedDetailsCited byCase study: 4D consistent receiver coupling corrections applied to deep‐water ocean bottom cable data31 January 2022 | Geophysical Prospecting, Vol. 70, No. 3Feasibility study of fracture interpretation using multicomponent seismic data: SEAM Phase II Barrett modelYoufang Liu and James Simmons15 October 2021 | Interpretation, Vol. 9, No. 4SEAM II Barrett model: Prestack multicomponent anisotropic modeling and its implications on fracture detectionYoufang Liu and Jim Simmons30 September 2020Introduction to this special section: Reservoir characterization Part IAli Tura and Margarita Corzo3 February 2020 | The Leading Edge, Vol. 39, No. 2A skeptic's view of VVAz and AVAzNorbert Van De Coevering, Klaas Koster, and Rob Holt3 February 2020 | The Leading Edge, Vol. 39, No. 2Optimum source-receiver orientations to capture PP, PS, SP, and SS reflected wave modesAndre Pugin and Öz Yilmaz2 January 2019 | The Leading Edge, Vol. 38, No. 1 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 Samara Omar and Jim Simmons, (2018), 9-C seismic VVAZ in HTI media: A synthetic study on the Niobrara Reservoir, SEG Technical Program Expanded Abstracts : 2427-2431. https://doi.org/10.1190/segam2018-2998010.1 Plain-Language Summary Keywordsmulticomponentanisotropyfracturesmodelingshear wave (S-wave)PDF DownloadLoading ..." @default.
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