| 裂步法最小二乘偏移 |
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| 引用本文： | 沈雄君,刘能超.裂步法最小二乘偏移[J].地球物理学进展,2012,27(2):761-770. |
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| 作者姓名： | 沈雄君 刘能超 |
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| 作者单位： | 1. 杭州地波工程物探技术有限公司,杭州,310000
2. 恒泰艾普石油天然气技术服务股份有限公司,北京,100084 |
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| 摘 要： | 最小二乘偏移的核心思想是用正向传播算子的逆算子代替其共轭转置算子进行偏移.它克服了常规偏移方法用共轭转置算子偏移的缺点.本文详细地描述了裂步法最小二乘偏移的原理,实现算法,并通过两个模型展示了裂步法最小二乘偏移的可行性和有效性.并且通过研究发现最小二乘较容易被扩展到基于其它波场延拓算子的最小二乘偏移.
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| 关 键 词： | 最小二乘偏移 裂步法偏移 共轭转置算子 逆算子 |
Split-step least-squares migration |
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| SHEN Xiong-jun
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LIU Neng-chao.Split-step least-squares migration[J].Progress in Geophysics,2012,27(2):761-770. |
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| Authors: | SHEN Xiong-jun LIU Neng-chao |
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| Institution: | 1.Hangzhou Dibo Geophysical Engineering Technology Co.,Ltd.,Hangzhou 310000,China; 2.LandOcean Energy Services Co.,Ltd.,Beijing 100084,China) |
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| Abstract: | The key point of least-squares migration is achieved by using the inverse of forward modelling operator instead of the adjoint operator.Thus least-squares migration could avoid the drawback of conventional migration,which images seismic data using an adjoint operator.In this paper,the theory of least-squares migration is fully described and two examples of synthetic data show that least-squares migration is feasible and efficient.In addition,our study reveals that it is easy to implement least-squares migration using other seismic wave propagation operators. |
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| Keywords: | least-squares migration split-step migration adjoint operator inverse operator |
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