Prestack Time-migration Velocity Analysis Using Remigration Trajectories

dc.creatorSantos
dc.creatorHenrique B.; Coimbra
dc.creatorTiago A.; Schleicher
dc.creatorJoerg; Novais
dc.creatorAmelia
dc.date2015-JUL-AUG
dc.date2016-06-07T13:15:42Z
dc.date2016-06-07T13:15:42Z
dc.date.accessioned2018-03-29T01:36:24Z
dc.date.available2018-03-29T01:36:24Z
dc.identifier
dc.identifierPrestack Time-migration Velocity Analysis Using Remigration Trajectories. Soc Exploration Geophysicists, v. 80, p. S151-S163 JUL-AUG-2015.
dc.identifier0016-8033
dc.identifierWOS:000361219200040
dc.identifier10.1190/GEO2014-0205.1
dc.identifierhttp://library.seg.org/doi/10.1190/geo2014-0205.1
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/241939
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1305637
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionWe have developed a prestack time-migration tool for local improvement of the seismic migration-velocity model. The method is based on remigration trajectories that describe the position of an image point in the image domain for different source-receiver offsets as a function of the migration velocity. It determines kinematic migration parameters using local-slope information of migrated seismic reflection events. These parameters, in turn, are used to locally correct the velocity model. The main advantage of this technique is that it allows us to carry out a moveout correction not just at a fixed point in a zero-offset (poststack) time-migrated gather, but varying through all offsets of a common-image gather, taking into account the reflection-point displacement in the midpoint direction. In other words, it provides for time-migration velocity analysis from prestack data. We have tested the feasibility of the method on synthetic data from four simple models and the Sigsbee2B data. Our tests determined that the proposed tool increases the velocity-model resolution and provides a plausible time-migrated image. The quality of the initial model is not critical. The procedure is quite efficient. Significant effort was spent on manual event picking.
dc.description80
dc.description4
dc.description
dc.descriptionS151
dc.descriptionS163
dc.descriptionPetrobras
dc.descriptionCGG
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFINEP
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionCGG-Brazil
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description
dc.description
dc.description
dc.languageen
dc.publisherSOC EXPLORATION GEOPHYSICISTS
dc.publisher
dc.publisherTULSA
dc.relationGEOPHYSICS
dc.rightsaberto
dc.sourceWOS
dc.subjectElliptically Anisotropic Media
dc.subjectImage-wave Propagation
dc.subjectUnified Approach
dc.subjectDiffractions
dc.subjectContinuation
dc.titlePrestack Time-migration Velocity Analysis Using Remigration Trajectories
dc.typeArtículos de revistas


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