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Reflection and Transmission Responses for Layered Transversely Isotropic Media With Vertical and Horizontal Symmetry Axes
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 81st EAGE Conference and Exhibition 2019, Jun 2019, Volume 2019, p.1 - 5
Abstract
Reflection and transmission (R/T) responses characterize the energy distributions for incident and generated waves across the subsurface interface. The R/T coefficients are considerably influenced by the local anisotropy. The transversely isotropic media with a vertical or horizontal symmetry axis (VTI or HTI) are commonly used models for characterizing the subsurface anisotropy. In this paper we consider the plane interface bounded by VTI and HTI half spaces, and the R/T coefficients normalized by the vertical energy flux are derived first. Under the weak contrast assumption, R/T coefficients are approximated based on two simple anisotropic models. The approximations with isotropic background media are also considered under an additional weak anisotropy assumption. Numerical tests are implemented for the proposed approximation methods.