Auto-picking velocity by path-integral optimization and surface fairing

作者：Lin Nian-Tian^*; Liu Hong; Li Gui-Hua; Tang Jian-Jian; Wei Li-Jie

来源：Acta Geophysica Sinica, 2013, 56(1): 246-254.

DOI：10.6038/cjg20130125

• Velocity spectrum
• Fairing
• The viterbi algorithm
• Stacking velocity
• Auto-picking

In this paper, we introduce the Viterbi algorithm and apply it to auto pick the stack velocity. Here, the Viterbi algorithm makes the rule to integral the max velocity spectrum, "energy group", forward and to get the optimal solution in recursion backward. The veracity of the solution has relation to the objective function, namely, the resolution of velocity spectrum. Therefore, we introduce a method of fairing for image processing to smooth the surface of velocity spectrum, to improve the resolution of velocity spectrum, finally, to provide a new way to obtain a solution of high accuracy. The results showed that it is not only helpful to improve precision of velocity picked, but also to realize auto-picking velocity by the Viterbi algorithm combined with surface fairing. Therefore, it is not only helpful to improve the efficiency of the conventional seismic data processing, but also rapid to provide the initial velocity for pre-stack depth migration.

• 出版日期2013-1
• 单位山东科技大学; 中国科学院地质与地球物理研究所兰州油气资源研究中心; 中国科学院地质与地球物理研究所