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dc.contributor.authorWaheed, Umair bin
dc.contributor.authorYarman, Can Evren
dc.contributor.authorFlagg, Garret
dc.date.accessioned2014-10-21T21:08:58Z
dc.date.available2014-10-21T21:08:58Z
dc.date.issued2014-08-05
dc.identifier.citationWaheed*, U. bin, Yarman, C. E., & Flagg, G. (2014). An iterative fast sweeping based eikonal solver for tilted orthorhombic media. SEG Technical Program Expanded Abstracts 2014. doi:10.1190/segam2014-0846.1
dc.identifier.issn1949-4645
dc.identifier.doi10.1190/segam2014-0846.1
dc.identifier.urihttp://hdl.handle.net/10754/333044
dc.description.abstractComputing first-arrival traveltimes of quasi-P waves in the presence of anisotropy is important for high-end near-surface modeling, microseismic-source localization, and fractured-reservoir characterization, and requires solving an anisotropic eikonal equation. Anisotropy deviating from elliptical anisotropy introduces higher-order nonlinearity into the eikonal equation, which makes solving the eikonal equation a challenge. We address this challenge by iteratively solving a sequence of simpler tilted elliptically anisotropic eikonal equations. At each iteration, the source function is updated to capture the effects of the higher order nonlinear terms. We use Aitken extrapolation to speed up the convergence rate of the iterative algorithm. The result is an algorithm for first-arrival traveltime computations in tilted anisotropic media. We demonstrate our method on tilted transversely isotropic media and tilted orthorhombic media. Our numerical tests demonstrate that the proposed method can match the first arrivals obtained by wavefield extrapolation, even for strong anisotropy and complex structures. Therefore, for the cases where oneor two-point ray tracing fails, our method may be a potential substitute for computing traveltimes. Our approach can be extended to anisotropic media with lower symmetries, such as monoclinic or even triclinic media.
dc.language.isoen
dc.publisherSociety of Exploration Geophysicists
dc.titleAn iterative fast sweeping based eikonal solver for tilted orthorhombic media
dc.typeConference Paper
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalSEG Technical Program Expanded Abstracts 2014
dc.conference.nameSEG Technical Program Expanded Abstracts 2014
dc.eprint.versionPublisher's Version/PDF
kaust.personWaheed, Umair bin
refterms.dateFOA2018-06-14T07:13:13Z
dc.date.published-online2014-08-05
dc.date.published-print2014-08-05


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