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http://dx.doi.org/10.7582/GGE.2011.14.3.191

Reverse-time Migration for VTI and TTI Media  

Kwak, Na-Eun (Dept. of Energy Systems Engineering, Seoul National University)
Min, Dong-Joo (Dept. of Energy Systems Engineering, Seoul National University)
Bae, Ho-Seuk (Dept. of Energy Systems Engineering, Seoul National University)
Publication Information
Geophysics and Geophysical Exploration / v.14, no.3, 2011 , pp. 191-202 More about this Journal
Abstract
Reserve-time migration (RTM) using a two-way wave equation is one of the most accurate migration techniques. RTM has been conducted by assuming that subsurface media are isotropic. However, anisotropic media are commonly encountered in reality. Conventional isotropic RTM may yield inaccurate results for anisotropic media. In this paper, we develop RTM algorithms for vertical transversely isotropic media (VTI) and tilted transversely isotropic media (TTI). For this, the pseudo-acoustic wave equations are used. The modeling algorithms are based on the high-order finite-difference method (FDM). The RTM algorithms are composed using the cross-correlation imaging condition or the imaging condition using virtual sources. By applying the developed RTM algorithms to the Hess VTI and BP TTI models, we could obtain better images than those obtained by the conventional isotropic RTM.
Keywords
anisotropy; VTI; TTI; reverse-time migration; pseudo-acoustic wave equation;
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Times Cited By KSCI : 4  (Citation Analysis)
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