Stabilizing the AVO gradient (2004)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2004Stabilizing the AVO gradientAuthors: D. N. WhitcombeM. DyceC. J. S. McKenzieH. HoeberD. N. WhitcombeBP, M. DyceBP, C. J. S. McKenzieBP, and H. HoeberCGGhttps://doi.org/10.1190/1.1839698 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract A technique to reduce the noise in AVO gradient data is presented. This filtering technique is a post‐processor to a traditional AVO fit. It has its roots both in time windowed AVO (Ratcliffe & Adler, 2000), and also in hodogram technology (Keho et al., 2001). Both of these approaches utilize the principle that, for noise‐free data, we expect a constant relationship between the intercept A, and gradient B for each point in the wavelet associated with a discrete reflection event. In B vs. A crossplot space these points would plot along a trajectory passing through the origin and characterized by a specific angle, which we call χ, and measure anti‐clockwise from the positive A axis. While hodogram technology uses this relationship to generate attributes for the identification of AVO anomalies, and time‐windowed AVO uses it to aid with velocity picking in class II territory, the output of our new technique is an improved AVO gradient volume. The approach can therefore be used as a pre‐processor for traditional AVO crossplotting (e.g. Castagna & Swan, 1997), or to precondition data for elastic impedance inversion of the intercept and gradient volumes (Whitcombe et al., 2002). This technique has been successfully applied to many data sets.Permalink: https://doi.org/10.1190/1.1839698FiguresReferencesRelatedDetailsCited byMonitoring CO 2 saturation using time-lapse amplitude versus offset analysis of 3D seismic data from the Ketzin CO 2 storage pilot site, Germany8 August 2018 | Geophysical Prospecting, Vol. 66, No. 8Exploration using extended elastic impedance in Nguma permit, offshore GabonJournal of the Japanese Association for Petroleum Technology, Vol. 79, No. 1High-resolution prestack seismic inversion using a hybrid FISTA least-squares strategyDaniel O. Pérez, Danilo R. Velis, and Mauricio D. Sacchi2 September 2013 | GEOPHYSICS, Vol. 78, No. 5Azimuthal AVO analysis: Stabilizing the model parametersChris Davison, Andrew Ratcliffe, Sergio Grion, Rodney Johnston, Carlos Duque, and Musa Maharramov8 August 2011Separation of Pressure and Saturation effects using AVO 4D in Marlim FieldJoão Paulo Pereira Nunes, Marcos Sebastião dos Santos, Nier Maciel, Alessandra Davolio, and Jean-Luc Formento28 April 2014A simple methodology for 4D noise reduction and repeatability improvementAlexander Zamorouev, Dave Whitcombe, Mel Dyce, and Linda Hodgson6 October 2006 SEG Technical Program Expanded Abstracts 2004ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2004 Pages: 2586 publication data© 2004 Copyright © 2004 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 03 Jan 2005 CITATION INFORMATION D. N. Whitcombe, M. Dyce, C. J. S. McKenzie, and H. Hoeber, (2004), "Stabilizing the AVO gradient," SEG Technical Program Expanded Abstracts : 232-235. https://doi.org/10.1190/1.1839698 Plain-Language Summary PDF DownloadLoading ...