计算物理 ›› 2008, Vol. 25 ›› Issue (2): 186-190.

• 研究论文 • 上一篇    下一篇

地震波传播路径追踪的波动方程方法

陈生昌1, 马在田2, WU Ru-Shan3   

  1. 1. 浙江大学地球科学系, 浙江 杭州 310027;
    2. 同济大学海洋与地球科学院, 上海 200092;
    3. Modeling and Imaging Laboratory, IGPP, University of California, Santa Cruz, CA95064, USA
  • 收稿日期:2006-11-20 修回日期:2007-05-15 出版日期:2008-03-25 发布日期:2008-03-25
  • 作者简介:陈生昌(1965-),男,江西永新,副教授,博士,从事勘探地球物理和计算地球物理方法与应用研究,浙江大学玉泉校区地球科学系310027.
  • 基金资助:
    国家自然科学基金项目(40674065);"863"计划项目(2006AA09Z307)资助项目

Wave Equation Method for Wavefield Propagation Path Tracing

CHEN Shengchang1, MA Zaitian2, WU Ru-Shan3   

  1. 1. Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;
    2. School of Ocean and Earth Sciences, Tongji University, Shanghai 200092, China;
    3. Modeling and Imaging Laboratory, IGP, University of California, Santa Cruz, CA 95064, USA
  • Received:2006-11-20 Revised:2007-05-15 Online:2008-03-25 Published:2008-03-25

摘要: 在地震勘探的地震波传播研究中,波场传播路径追踪是一项重要研究内容,通常采用射线理论追踪地震波传播路径.提出一种波动方程波场传播路径追踪方法,首先利用窗口Fourier框架展开技术对源点和目标点的波场进行角度分解,并计算它们的方向照明,然后利用角度相干技术获取源点和目标点间的波场传播路径.该方法可以有效考虑地下非均匀介质对地震波场传播的聚焦与散焦作用.

关键词: 波场, 传播路径, 窗口Fourier框架展开, 角度分解, 波动方程, 追踪

Abstract: A wave equation method tracing wavefield propagation path is proposed with ray theory. A windowed Fourier frame expansion technique is employed for angle decomposition of wavefields of source-point and target-point. Directional illumination is calculated. An angle coherence technique is applied to directional illumination to acquire propagation path between source-point and target-point. The method takes into account focusing and defocusing effects of the wavefield propagation caused by inhomogeneous media.

Key words: wavefield, propagation path, windowed Fourier frame expansion, angle decomposition, wave equation, tracing

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