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《Chinese Journal of Geophysics》 2013-01
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Auto-picking velocity by path-integral optimization and surface fairing

LIN Nian-Tian1,LIU Hong2,LI Gui-Hua1,TANG Jian-Jian1,WEI Li-Jie1 1 Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals,College of Geological Sciences & Engineering,Shandong University of Science and Technology,Qingdao 266590,China 2 Institute of Geology & Geophysics,Chinese Academy of Sciences,Beijing 100029,China 3 No.9 Geological Exploration Unit of Zhejiang,Zhejiang Huzhou 313000,China  
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.
【Fund】: 国家自然科学基金项目(41174098 40904009);; 国家高技术研究发展计划(863项目)(2012AA061202 2013AA064201)联合资助
【CateGory Index】: P631.4
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【Citations】
Chinese Journal Full-text Database 5 Hits
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【Co-citations】
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