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dc.contributor.authorWaheed, Umair bin
dc.contributor.authorAlkhalifah, Tariq Ali
dc.date.accessioned2015-09-28T06:41:31Z
dc.date.available2015-09-28T06:41:31Z
dc.date.issued2015-03-23
dc.identifier.citationAn efficient wave extrapolation method for anisotropic media with tilt 2015, 63 (5):1126 Geophysical Prospecting
dc.identifier.issn00168025
dc.identifier.doi10.1111/1365-2478.12233
dc.identifier.urihttp://hdl.handle.net/10754/578798
dc.description.abstractWavefield extrapolation operators for elliptically anisotropic media offer significant cost reduction compared with that for the transversely isotropic case, particularly when the axis of symmetry exhibits tilt (from the vertical). However, elliptical anisotropy does not provide accurate wavefield representation or imaging for transversely isotropic media. Therefore, we propose effective elliptically anisotropic models that correctly capture the kinematic behaviour of wavefields for transversely isotropic media. Specifically, we compute source-dependent effective velocities for the elliptic medium using kinematic high-frequency representation of the transversely isotropic wavefield. The effective model allows us to use cheaper elliptic wave extrapolation operators. Despite the fact that the effective models are obtained by matching kinematics using high-frequency asymptotic, the resulting wavefield contains most of the critical wavefield components, including frequency dependency and caustics, if present, with reasonable accuracy. The methodology developed here offers a much better cost versus accuracy trade-off for wavefield computations in transversely isotropic media, particularly for media of low to moderate complexity. In addition, the wavefield solution is free from shear-wave artefacts as opposed to the conventional finite-difference-based transversely isotropic wave extrapolation scheme. We demonstrate these assertions through numerical tests on synthetic tilted transversely isotropic models.
dc.language.isoen
dc.publisherWiley
dc.relation.urlhttp://doi.wiley.com/10.1111/1365-2478.12233
dc.rightsArchived with thanks to Geophysical Prospecting
dc.subjectAnisotropy
dc.subjectModelling
dc.subjectWave
dc.titleAn efficient wave extrapolation method for anisotropic media with tilt
dc.typeArticle
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSeismic Wave Analysis Group
dc.identifier.journalGeophysical Prospecting
dc.eprint.versionPublisher's Version/PDF
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personWaheed, Umair bin
kaust.personAlkhalifah, Tariq Ali
refterms.dateFOA2016-03-23T00:00:00Z
dc.date.published-online2015-03-23
dc.date.published-print2015-09


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