Reverse-time Migration Using One-way Wavefield Imaging Condition
Reverse-time Migration Using One-way Wavefield Imaging Condition
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DOI：
10.1190/1.2792917
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Faqi Liu;S. Morton;J. Leveille;Guanquan Zhang
中科院分区：
文献类型：
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作者：
Faqi Liu;S. Morton;J. Leveille;Guanquan Zhang
逆时偏移能够对包括倒转构造在内的所有倾角进行成像。然而，常规成像条件会在图像中产生高振幅噪声，这常常会严重掩盖浅层构造。在本文中，我们提出一种新的成像条件来消除这些噪声，该方法通过将全波场分解为单向分量，并将成像条件应用于波场分量的适当组合来实现。数值试验验证了这种新的成像条件成功地去除了不需要的噪声。
Reverse-time migration has the capability to image all dips including overturned structures. However, the conventional imaging condition produces high-amplitude noises in the image, which often seriously mask the shallow structures. In this paper, we propose a new imaging condition to eliminate these noises which works by decomposing the full wavefields to their one-way components, and applying the imaging condition to the appropriate combinations of the wavefield components. Numerical tests verify that this new imaging condition successfully removes the undesired noises.