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dc.contributor.authorZhang, Z.
dc.contributor.authorAlkhalifah, Tariq Ali
dc.date.accessioned2020-06-29T12:03:35Z
dc.date.available2020-06-29T12:03:35Z
dc.date.issued2017-03-13
dc.identifier.citationZhang, Z., & Alkhalifah, T. (2016). Efficient Quasi-P Wavefield Extrapolation Using an Isotropic Lowrank Approximation. 78th EAGE Conference and Exhibition 2016. doi:10.3997/2214-4609.201600814
dc.identifier.isbn9789462821859
dc.identifier.doi10.3997/2214-4609.201600814
dc.identifier.urihttp://hdl.handle.net/10754/663931
dc.description.abstractUsually the computational cost of the quasi-P simulation depends on the complexity of the medium, and specifically the anisotropy. The effective-model method splits the anisotropic dispersion relation to an isotropic background and a correction factor that depends on the gradient of the wavefields. As a result, the computational cost is independent of the nature of anisotropy, which makes the extrapolation efficient. A dynamic implementation of this approach decomposes the original pseudo-differential operator into a Laplacian, handled using the low-rank approximation of the spectral operator, and an angular dependent correction factor applied in the space domain to correct for anisotropy. We analyze the role played by the correction factor and propose a new spherical decomposition. The proposed method provides accurate wavefields in phase and a more balanced amplitude. Also, it is free of SV-wave artifacts. Applications to a simple homogeneous VTI model and the revised Hess VTI model demonstrate the effectiveness of the approach.
dc.description.sponsorshipWe thank KAUST for its support and the SWAG members especially Zedong and Nabil for their valuable insights, as well as Yike Liu for his help. We thank Hess cooperation for the VTI model.
dc.publisherEAGE Publications BV
dc.relation.urlhttp://www.earthdoc.org/publication/publicationdetails/?publication=85059
dc.rightsArchived with thanks to EAGE Publications BV
dc.titleEfficient quasi-P wavefield extrapolation using an isotropic lowrank approximation
dc.typeConference Paper
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSeismic Wave Analysis Group
dc.conference.date2016-05-30 to 2016-06-02
dc.conference.name78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
dc.conference.locationVienna, AUT
dc.eprint.versionPre-print
kaust.personZhang, Z.
kaust.personAlkhalifah, Tariq Ali
dc.identifier.eid2-s2.0-85085849952
kaust.acknowledged.supportUnitSWAG members


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