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《Progress in Geophysics》 2014-01
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The research of travel time tomographic velocity modeling method on first break

QIN Ning;LI Zhen-chun;SANG Yun-yun;ZHANG Kai;Geophysical Research Institute of Sinopec Shengli Oilfield,Postdoctoral Scientific Research Workstation of Sinopec Shengli Oilfield;School of Geosciences,China University of Petroleum;Huabei Sub-institute of Research Institute of BGP,CNPC;  
The kernel of tomographic inversion is the solution of sensitive kernel function and the establishing set of travel time equations.Based on the ray theory,ray tracing is the main method to calculate the sensitive kernel function and travel time.Therefore the way to trace first break travel path exactly is needed for first break tomography.In this paper the formula of parabolic travel time interpolation is derived based on the previous research.This paper puts forward the dynamic shortest path ray tracing algorithm using parabolic travel time interpolation.The theoretical model and the real data prove the feasibility of the method,which is used to realize the velocity modeling based on the first break tomography.
【Fund】: 国家自然科学基金(41204086);; 中国石油大学自主创新科研计划资助项目(13CX02041A);; 教育部博士点基金项目(20110133120001);; 国家863课题(2011AA060301);; 国家科技重大专项(2011ZX05006-002)共同资助
【CateGory Index】: P631.4
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