Automatic Picking in the Semblance Domain
Wildney W. S. Vieira, Lourenildo W. B. Leite, Fernando S. M. Nunes · 2011
PreviousNext No Access12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011Automatic Picking in the Semblance DomainAuthors: Wildney W. S. VieiraLourenildo W. B. LeiteFernando S. M. NunesWildney W. S. VieiraUFPA, Brazil, Lourenildo W. B. LeiteUFPA, Brazil, and Fernando S. M. NunesUFPA, Brazilhttps://doi.org/10.1190/sbgf2011-325 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The specific goal of this work was to develop a method for automatic velocity picking based on the semblance function as a nonlinear optimization problem. We define the steps of conventional velocity analysis (CVA) for each CMP in the following way: first, stacking velocities are estimated by means of semblance sum along hyperbolic time trajectories producing a map of S(vrms,t0); second, manual picking is performed on this semblance map for several stacking time t0; third, interval velocities, vint, are calculated based on the picked stacking velocities, vrms, to construct an earth velocity time model, that do not require a reference earth model. The present work is multi-task as: 1. to eliminate the picking step by considering that stacking velocities are based on an interval velocity model; 2. to search for an interval velocity model that best explains the estimated stacking velocities; and 3. the search is automatic, but subject to physical constraints. Keywords: seismic, inversion, velocityPermalink: https://doi.org/10.1190/sbgf2011-325FiguresReferencesRelatedDetailsCited ByAutomatic nonhyperbolic velocity analysis by polynomial chaos expansionMostafa Abbasi and Ali Gholami15 November 2018 | GEOPHYSICS, Vol. 83, No. 6 12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011ISSN (online):2159-6832Copyright: 2011 Pages: 2223 publication data© 2011 Published in electronic format with permission by the Brazilian Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished: 13 Mar 2014 CITATION INFORMATION Wildney W. S. Vieira, Lourenildo W. B. Leite, and Fernando S. M. Nunes, (2011), "Automatic Picking in the Semblance Domain," SEG Global Meeting Abstracts : 1573-1578. https://doi.org/10.1190/sbgf2011-325 Plain-Language Summary KeywordsseismicinversionvelocityPDF DownloadLoading ...