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›› 2002, Vol. 19 ›› Issue (2): 134-140.DOI: 10.7523/j.issn.2095-6134.2002.2.007

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Methodology and Application for 3D Wave-Equation Symplectic Prestack Depth Migration

LIU Li-Nong1, LIU Hong1, LI You-Ming LI Jian-Yong1, LI Bing1, CHEN Shu-Min1, FAN Xing-Cai2, ZHANG Er-Hua2, PEI Jiang-Yun2, NIAN Jing-Bo2   

  1. 1. Institute of Oceanology of the Chinese Academy of Sciences, Qingdao 266071;
    2. The Graduate School of the Chinese Academy of Sciences, Beijing 100039
  • Received:2001-12-03 Revised:2001-12-03 Online:2002-03-18

Abstract:

A three-dimensional wavefield extrapolation operator with second-order precision keeping symplectic nature is described in this paper. The flow chart of wave-equation prestack depth migration is consists of three main parts: (i)seismic data relative preprocessing; (ii) 2.5D prestack depth migration velocity analysis; (iii)3D prestack depth migration. A 3D seismic data processing example of this approach of SW area, which is 126 km2 square, is proposed, and the result shows satisfied application ability of the flow.

Key words: wave-equation, prestack depth migration, velocity analysis, paralell computing

CLC Number: