dc.creatorTygel, M
dc.creatorUrsin, B
dc.creatorStovas, A
dc.date2007
dc.dateMAR-APR
dc.date2014-11-16T05:01:54Z
dc.date2015-11-26T16:19:57Z
dc.date2014-11-16T05:01:54Z
dc.date2015-11-26T16:19:57Z
dc.date.accessioned2018-03-28T23:02:39Z
dc.date.available2018-03-28T23:02:39Z
dc.identifierGeophysics. Soc Exploration Geophysicists, v. 72, n. 2, n. D21, n. D28, 2007.
dc.identifier0016-8033
dc.identifierWOS:000245441200009
dc.identifier10.1190/1.2434774
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57145
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/57145
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57145
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1267756
dc.descriptionFor a multiply reflected SH-wave or a multiply reflected and converted qP/qSV-wave in a layered VTI medium, traveltime and offset can be expressed by power series in horizontal slowness. As for a stack of isotropic layers, these can be used to express traveltime as a series of even powers of offset. The existence and behavior of this power series depend on the derivative of offset with respect to horizontal slowness, formally expressed as traveltime multiplied by NMO-velocity squared. When the NMO-velocity squared is different from zero, the power series always exists for sufficiently small offset. The NMO-velocity squared is always positive for SH-waves and for qP-waves in media with normal polarization, for which there are no triplications in traveltime as function of offset. For qSV-wave propagation some layers, the NMO-velocity squared may be positive, zero, or negative. When it is positive, the power series exists, but there may be an off-axis triplication in traveltime. When the NMO-squared velocity is zero, the power series does not exist, and there is an incipient triplication on the vertical axis. When the NMO-velocity squared is negative, there is a triplication in traveltime on the vertical axis. The power series exists and represents the first-arrival traveltime branch. Numerical examples show that when the value of the NMO-velocity squared is small, the power series for a qSV-wave can be used only for very small values of offset. The series of traveltime squared in powers of offset always exists when the series for traveltime exists; therefore, it must have the same or larger region of convergence.
dc.description72
dc.description2
dc.descriptionD21
dc.descriptionD28
dc.languageen
dc.publisherSoc Exploration Geophysicists
dc.publisherTulsa
dc.publisherEUA
dc.relationGeophysics
dc.relationGeophysics
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectTransversely Isotropic Medium
dc.subjectNormal-moveout
dc.subjectReflection
dc.titleConvergence of traveltime power series for a layered VTI medium
dc.typeArtículos de revistas


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