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《Chinese Journal of Geophysics》 2009-07
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Research of dual parameters evolving common reflection point stack and velocity analysis method

ZHOU Qing-Chun~(1,2),LIU Huai-Shan~1,Kondrashkov V V~3,LI Guo-Du~2,LIN Yi-Hua~21 Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of ChinaQingdao 266100,China2 Landocean Energy Services Co.,Ltd.,Beijing 100084,3 Research Centre of Geophysical Prospecting Technology,  
We can get more accurate zero-offset section and corresponding CRP velocity field by ellipse evolving common reflection point(CRP)than by conventional dip moveout(DMO).Many studies and tests confirm that its effect is remarkable in weakly heterogeneous media area. However,it does not take transverse changes of velocity and converted waves into account. When the media is strongly heterogeneous,the method is not exact any longer.We introduce dual parameters (average velocity and velocity ratio of up-going wave velocity and down-going wave velocity) which reveal transverse changes of velocity to optimize ellipse evolving CRP stack. This paper reasons out detailed stack and velocity estimation arithmetic with dual parameters.By using theoretical model and seismic data processing,optimized arithmetic can more ideally solve the questions of velocity modeling and stack imaging in complex geology area.
【Fund】: 国家863项目(2006AA09Z339 2006AA06A108);; 973项目(2009CB219505)资助.
【CateGory Index】: P631.4
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