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《Progress In Geophysics》 2005-04
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The identification of small faults and low-amplitude structures by utilizing prestack Kirchhoff integral migration

TENG Dian-bo,WANG Peng-cheng, WANG Yun,YAO Zhen-xing (Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China)  
It is very difficult to interpret small faults and low-amplitude structures using the conventional seismic section.In this paper,both compress wave(P) and converted shear wave(PS) velocity models are applied in prestack Kirchhoff migration to process 2D seismic data and gained P wave and PS wave time and depth sections respectively,which are then used to interpret low-amplitude structures and small faults.The depth section overcomes the shortage of the time section,which can be influenced by the thickness and velocity of layers jointly,and shows the thickness of strata distinctly.PS section has more advantage over P section in identifying small faults.These merits are verified by our processing and interpretation of the seismic data in Zhungaer basin.
【Key Words】: Kirchhoff integral migration low-amplitude structure compress wave converted shear wave
【Fund】: 中国石化总公司与中科院地质与地球物理所合作的部级项目“地震各向异性在油气田勘探中的应用”项目(P02075)资助
【CateGory Index】: P631.4
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