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dc.contributor.authorChu, Chunlei
dc.contributor.authorStoffa, Paul L.
dc.date.accessioned2016-02-25T13:51:02Z
dc.date.available2016-02-25T13:51:02Z
dc.date.issued2012-01
dc.identifier.citationChu C, Stoffa PL (2012) Nonuniform grid implicit spatial finite difference method for acoustic wave modeling in tilted transversely isotropic media. Journal of Applied Geophysics 76: 44–49. Available: http://dx.doi.org/10.1016/j.jappgeo.2011.09.027.
dc.identifier.issn0926-9851
dc.identifier.doi10.1016/j.jappgeo.2011.09.027
dc.identifier.urihttp://hdl.handle.net/10754/599005
dc.description.abstractDiscrete earth models are commonly represented by uniform structured grids. In order to ensure accurate numerical description of all wave components propagating through these uniform grids, the grid size must be determined by the slowest velocity of the entire model. Consequently, high velocity areas are always oversampled, which inevitably increases the computational cost. A practical solution to this problem is to use nonuniform grids. We propose a nonuniform grid implicit spatial finite difference method which utilizes nonuniform grids to obtain high efficiency and relies on implicit operators to achieve high accuracy. We present a simple way of deriving implicit finite difference operators of arbitrary stencil widths on general nonuniform grids for the first and second derivatives and, as a demonstration example, apply these operators to the pseudo-acoustic wave equation in tilted transversely isotropic (TTI) media. We propose an efficient gridding algorithm that can be used to convert uniformly sampled models onto vertically nonuniform grids. We use a 2D TTI salt model to demonstrate its effectiveness and show that the nonuniform grid implicit spatial finite difference method can produce highly accurate seismic modeling results with enhanced efficiency, compared to uniform grid explicit finite difference implementations. © 2011 Elsevier B.V.
dc.description.sponsorshipStoffa would like to acknowledge the King Abdullah University of Science and Technology (KAUST) for their support of his research. We gratefully acknowledge the useful comments from two anonymous reviewers, which helped improve the original manuscript. We thank ConocPhillips for permission to publish this work.
dc.publisherElsevier BV
dc.subjectAcoustic wave propagation
dc.subjectImplicit finite difference
dc.subjectNonuniform grid
dc.subjectTilted transversely isotropic
dc.titleNonuniform grid implicit spatial finite difference method for acoustic wave modeling in tilted transversely isotropic media
dc.typeArticle
dc.identifier.journalJournal of Applied Geophysics
dc.contributor.institutionConocoPhillips, Houston, United States
dc.contributor.institutionUniversity of Texas at Austin, Austin, United States


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