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Nonhyperbolic Stretch-Free NMO in Anisotropic Media
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
The conventional hyperbolic approximation for reflection moveout in layered media is applicable only for short spreads, even if the layers are isotropic; this is while presence of anisotropy further increase the deviation from hyperbolic moveout. Therefore, the main advantage of nonhyperbolic moveout approximations is at larger spreads. However, the NMO stretching issue acts as an obstacle in using these parts of the recorded data. In this study, using two common nonhyperbolic approximations, we propose a method to avoid NMO stretching in vertically heterogeneous and anisotropic media. The effectiveness of the new method in producing a stretch-free NMO gather is tested on synthetic data generated based on elastic properties of a real medium.