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• W3083851338 abstract "Fast and accurate traveltime computation for quasi-P waves in anisotropic media is an essential ingredient of many seismic processing and interpretation applications such as Kirchhoff modeling and migration, microseismic source localization, and traveltime tomography. Fast-sweeping methods are widely used for solving the anisotropic eikonal equation due to their flexibility in solving general equations compared to the fast-marching method. However, it has been observed that fast sweeping can be much less efficient than fast marching for models with curved characteristics and practical grid sizes. By representing a tilted transversely isotropic (TTI) equation as a sequence of elliptically isotropic (EI) eikonal equations, we determine that the fast-marching algorithm can be used to compute fast and accurate traveltimes for TTI media. The tilt angle is absorbed into the description of the effective EI model; therefore, the adopted approach does not compromise on the solution accuracy. Through tests on benchmark synthetic models, we test our fast-marching algorithm and discover considerable improvement in accuracy by using factorization and a second-order finite-difference stencil. The adopted methodology opens the door to the possibility of using the fast-marching algorithm for a wider class of anisotropic eikonal equations." @default.
• W3083851338 created "2020-09-14" @default.
• W3083851338 creator A5082388493 @default.
• W3083851338 date "2020-11-01" @default.
• W3083851338 modified "2023-10-14" @default.
• W3083851338 title "A fast-marching eikonal solver for tilted transversely isotropic media" @default.
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• W3083851338 doi "https://doi.org/10.1190/geo2019-0799.1" @default.
• W3083851338 hasPublicationYear "2020" @default.
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