3D generalized nonhyperboloidal moveout approximation |

**Yanadet Sripanich ^{}, Sergey Fomel^{}, Alexey Stovas^{}, and Qi Hao^{}**

Bureau of Economic Geology

John A. and Katherine G. Jackson School of Geosciences

The University of Texas at Austin

University Station, Box X

Austin, TX 78713-8924

Moveout approximations are commonly used in velocity analysis and time-domain seismic imaging. We revisit the previously proposed generalized nonhyperbolic moveout approximation and develop its extension to the 3D multi-azimuth case. The advantages of the generalized approximation are its high accuracy and its ability to reduce to several other known approximations with particular choices of parameters. The proposed 3D functional form involves seventeen independent parameters instead of five as in the 2D case. These parameters can be defined by zero-offset traveltime attributes and four additional far-offset rays. In our tests, the proposed approximation achieves significantly higher accuracy than previously proposed 3D approximations.

- Introduction
- Nonhyperboloidal moveout approximation

- General method for parameter definition

- Accuracy tests
- Homogeneous HTI layer
- Homogeneous orthorhombic layer
- Homogeneous orthorhombic layer with azimuthal rotation
- Layered orthorhombic model
- Layered orthorhombic model with azimuthal rotation in sublayers
- Layered orthorhombic model from SEAM Phase II unconventional model

- Discussion
- Conclusions
- Acknowledgments
- Appendix A: Alternative derivation of the moveout approximation in equation 12
- Bibliography
- About this document ...

3D generalized nonhyperboloidal moveout approximation |

2017-04-20