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Next: ACKNOWLEDGMENTS Up: Fomel & Stovas: Generalized Previous: Discussion

CONCLUSIONS

We propose a five-parameter nonhyperbolic moveout approximation that generalizes the classic two-parameter hyperbolic approximation as well as some known three-parameter approximations. We propose a method for selecting the approximation parameters, which involves only two rays: the normal-incident ray and one additional ray, preferably at a large offset. The special case of the additional ray being horizontal can be handled as well.

A comparison with the classic hyperbolic approximation, the shifted hyperbola approximation and the Alkhalifah-Tsvankin approximation for analytical and numerical isotropic and transversely isotropic models shows that the proposed generalized nonhyperbolic approximation can bring an improvement of several orders of magnitude in approximation accuracy. Based on these experiments, we claim that, for many practical purposes, the proposed approximation can be used in place of the exact moveout.




2013-03-02