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《Progress in Geophysics》 2008-04
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Application of forward modeling technique pre-stack depth migration in Xingcheng area

LI Su-hua1,WANG Yun-zhuan2,FAN Xing-cai3,LU Qi-jun1 (1.Marine facies Academy of Exploration and Development Research Institute,South-west Oil & Gas Branch Company,SINOPEC,Guiyang 550004,China;2.College of earth sciences,Daqing Petroleum Institute,Daqing 163318,China;3.Exploration and Development Research Institute of Daqing Oilfield company Limited,Daqing 163712,China)  
The volcanic rock of Xingcheng area in the Xujiaweizi rift of the Songliao basin is deep-seated.Its has well developed faults,high fault dips,complicated structures,the different horizontal velocities and bad imaging effect in the conventional time-domain.The image accuracy of underlying formation has been affected for the screening effect of volcanic rocks.To cope with this problem,the wave equation forward model is used to study the typical geological structures of this area and the conventional processing and pre-stack migration processing are developed with the gather records,and pre-stack depth migration is the emphasis.We can see from the modeling results that the forward modeling technique used in the practical volcanic seismic data is very important in getting an accurate velocity-depth model with practical seismic data and improving the tomography quality of complicated structures,the next step which is used in examining the rationality of interpretation schemes.
【CateGory Index】: P631.4
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