| 抛物Radon变换法近偏移距波场外推 |
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| 引用本文： | 王维红,刘洪. 抛物Radon变换法近偏移距波场外推[J]. 地球物理学进展, 2005, 20(2): 289-293 |
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| 作者姓名： | 王维红 刘洪 |
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| 作者单位： | 中国科学院地质与地球物理研究所,北京,100029;中国科学院地质与地球物理研究所,北京,100029 |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | 本文给出了抛物Radon变换的基本原理，以及部分动校正后的CMP道集抛物线近似有效性的证明，基于带限正反最小平方抛物Radon变换的Levinson递推算法，对缺失的近偏移距地震波场进行叠前重建和外推.给出了抛物Radon变换法地震道重建外推的基本原理和叠前地震数据规则化的处理流程，另外对于Radon域均匀采样的情形，本文给出了均匀层状介质和Marmousi模型的近偏移距外推结果，计算结果验证了算法的稳定性和适用性.
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| 关 键 词： | 抛物Radon变换(PRT) 场外推 偏移距 分动校正 Levinson递推算法 |
| 文章编号： | 1004-2903(2005)02-0289-05 |
| 修稿时间： | 2004-10-02 |
Near offset wavefield extrapolation based on parabolic Radon transform |
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| WANG Wei-hong,LIU Hong. Near offset wavefield extrapolation based on parabolic Radon transform[J]. Progress in Geophysics, 2005, 20(2): 289-293 |
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| Authors: | WANG Wei-hong LIU Hong |
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| Abstract: | The basic principle of parabolic Radon transform is given in this paper, and also the verification of validity of parabolic approximation after partial normal moveout(NMO)correction for common midpoint(CMP) gather. Prestack near offset extrapolation result is shown based on band limited forward and inverse least square parabolic Radon transform. The basic principle of seismic trace reconstruction and extrapolation of PRT approach and the corresponding prestack processing full algorithm is shown in this paper. The reconstruction and extrapolation result of layered formation and Marmousi model demonstrate the given algorithm's stability. |
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| Keywords: | parabolic Radon transform(PRT) wavefield extrapolation near offset partial NMO Levinson recursion algorithm |
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