| 二维矢量地震波场的叠前逆时深度偏移 |
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| 引用本文： | 刘军伟,张会星,等.二维矢量地震波场的叠前逆时深度偏移[J].中国煤田地质,2002,14(4):62-63,69. |
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| 作者姓名： | 刘军伟 张会星 |
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| 作者单位： | 中国矿业大学 北京100083
(刘军伟，张会星)，中国矿业大学 北京100083(宁书年) |
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| 摘 要： | 从矢量波动理论出发，导出了二维弹性波逆时传播的高阶差分格式，实现了弹性波在数值空间中的逆时延拓，采用逆时格式差分求解程函方程，得到网格空间中各点的直达波旅行时，以此作为弹性波逆时偏移的成像条件。实现了二维多波多波多分量资料的叠前逆时深度偏移，数值试验得到了满意结果。
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| 关 键 词： | 矢量波场 逆时偏移 成像条件 地震勘探 弹性波 |
| 文章编号： | 1004-9177(2002)04-0062-02 |
Pre-stack Reverse-time Depth Migration of 2D Vectorial Seismic Wave Field |
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| LIU Jun-wei,ZHANG Hui-xing,NING Shu-nian.Pre-stack Reverse-time Depth Migration of 2D Vectorial Seismic Wave Field[J].Coal Geology of China,2002,14(4):62-63,69. |
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| Authors: | LIU Jun-wei ZHANG Hui-xing NING Shu-nian |
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| Abstract: | Based on vectorial seismic theor y, a high-order finite difference scheme fo r 2D isotropic media is derived in the paper which can achieve reverse-time extrapolat ion of elastic waves. An upwind finite-diff erence scheme of eikonal equation along exp anding wavefronts is developed which can ca lculate imaging condition of reverse-time migration. Using these two techniques the a uthor implements the reverse-time migratio n of 2D isotropic media in the paper, and th e synthetic data test of this method produc es good images. |
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| Keywords: | multicomponent seismic explorat ion vectorial wave field reverse-time mi gration imaging condition220Hz) and hei |
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