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《Progress In Geophysics》 2003-01
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The CFP technology in seismic processing of complex media

WANG Cheng xiang 1,2 ,ZHAO Bo 1 ,ZHANG Guan quan 2 ,LI Shun an 3(1.CNPC Exploration Software Corporation,Ltd. Zhuozhou 072750,China;2.The Scientific Research Institute of Mathematics and System, Chinese Academy of Sciences, Beijing 100080,China;3. Xian University of Electronic Science and Technology,Xian 710010)  
The paper presents a new technology of CFP(Common Focusing Point) for seismic processing of complex media, CFP 's basic principles and main application is also showed briefly. CFP is a new technology in seismic processing of complex media. It formulates the pre stack migration into two focusing steps: the focusing in detection followed by the focusing in emission, the intermediate result is CFP gather that can be processed. Confocal CFP migration can provide angle averaged reflection information, while the bifocal CFP migration can provide angle-dependent reflection information. Application of CFP method includes: (1) CFP migration, (2) Building velocity depth model for pre stack depth migration; (3) Statics correction of complex surface area through operator representation instead of velocity; (4) Removal of internal multiples and (5), CFP datum extrapolation and subsalt imaging.