A fast algorithm for 3D azimuthally anisotropic velocity scan

作者：Hu Jingwei^*; Fomel Sergey; Ying Lexing

来源：Geophysical Prospecting, 2015, 63(2): 368-377.

DOI：10.1111/1365-2478.12180

• 3D
• Velocity analysis
• Anisotropic parameter

The conventional velocity scan can be computationally expensive for large-scale seismic data sets, particularly when the presence of anisotropy requires multiparameter scanning. We introduce a fast algorithm for 3D azimuthally anisotropic velocity scan by generalizing the previously proposed 2D butterfly algorithm for hyperbolic Radon transforms. To compute semblance in a two-parameter residual moveout domain, the numerical complexity of our algorithm is roughly O(N-3 log N) as opposed to O(N-5) of the straightforward velocity scan, with N being the representative of the number of points in a particular dimension of either data space or parameter space. Synthetic and field data examples demonstrate the superior efficiency of the proposed algorithm.

• 出版日期2015-3