3D generalized nonhyperboloidal moveout approximation

Published as Geophysics, 82, no. 2, C49-C59, (2017)

3D generalized nonhyperboloidal moveout approximation

Yanadet Sripanich, Sergey Fomel, Alexey Stovas, and Qi Hao
The University of Texas at Austin
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

Abstract:

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.

3D generalized nonhyperboloidal moveout approximation