Type
Conference PaperAuthors
Masmoudi, Nabil
Alkhalifah, Tariq Ali

KAUST Department
Earth Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Date
2014-08-05Online Publication Date
2014-08-05Print Publication Date
2014-08-05Permanent link to this record
http://hdl.handle.net/10754/593369
Metadata
Show full item recordAbstract
Building credible anisotropy models is crucial in imaging. One way to estimate anisotropy parameters is to relate them analytically to traveltime, which is challenging in inhomogeneous media. Using perturbation theory, we develop traveltime approximations for transversely isotropic media with horizontal symmetry axis (HTI) as explicit functions of the anellipticity parameter η and the symmetry axis azimuth ϕ in inhomogeneous background media. Specifically, our expansion assumes an inhomogeneous elliptically anisotropic background medium, which may be obtained from well information and stacking velocity analysis in HTI media. This formulation has advantages on two fronts: on one hand, it alleviates the computational complexity associated with solving the HTI eikonal equation, and on the other hand, it provides a mechanism to scan for the best fitting parameters η and ϕ without the need for repetitive modeling of traveltimes, because the traveltime coefficients of the expansion are independent of the perturbed parameters η and ϕ. The accuracy of our expansion is further enhanced by the use of shanks transform. We show the effectiveness of our scheme with tests on a 3D model and we propose an approach for multi-parameters scanning in TI media.Citation
Masmoudi*, N., & Alkhalifah, T. (2014). Multi-parameters scanning in HTI media. SEG Technical Program Expanded Abstracts 2014. doi:10.1190/segam2014-0437.1Publisher
Society of Exploration GeophysicistsConference/Event name
SEG Technical Program Expanded Abstracts 2014Additional Links
http://library.seg.org/doi/abs/10.1190/segam2014-0437.1ae974a485f413a2113503eed53cd6c53
10.1190/segam2014-0437.1