| 矢量波场弹性波Kirchhoff偏移 |
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| 引用本文： | 杜启振,侯波.矢量波场弹性波Kirchhoff偏移[J].应用地球物理,2008,5(4):284-293. |
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| 作者姓名： | 杜启振 侯波 |
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| 作者单位： | [1]School of Earth Resource and information, China University of petroleum （East China）, Dongying 257061, China [2]CNPC Key Laboratory of Geophysical Exploration, China University of petroleum （Beijing）, Beijing 102202, China |
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| 基金项目： | National High-Tech Research and Development Program of China，Open Fund of the Key Laboratory of Geophysical Exploration of CNPC，CNPC Young InnovationFund，graduate student Innovation Fund of China University of Petroleum(East China)，the Program for New Century Excellent Talents in University |
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| 摘 要： | Based on Kuo and Dai＇s vectorial wave-field extrapolation equations, we derive new Kirchhoff migration equations by introducing unit vectors which represent the ray directions at the imaging points of the reflected P- and PS converted-waves. Furthermore, using the slope of the events on shot records and a ray racing procedure, mirror-image reflection points are found and the reflection data are smeared along the Fresnel zone. The migration method proposed in this paper solves two troublesome imaging problems caused by limited receiving aperture and migration artifacts resulting from wave propagation at the velocities of non original wave type. The migration method is applied successfully with model data, demonstrating that the new method is effective and correct.
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| 关 键 词： | 偏振 波 物理学家 方法 |
| 收稿时间： | 3 October 2008 |
Elastic Kirchhoff migration of vectorial wave-fields |
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| Qizhen?Du,Bo?Hou.Elastic Kirchhoff migration of vectorial wave-fields[J].Applied Geophysics,2008,5(4):284-293. |
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| Authors: | Qizhen Du Bo Hou |
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| Institution: | (1) School of Earth Resource and information, China University of petroleum (East China), Dongying, 257061, China;(2) CNPC Key Laboratory of Geophysical Exploration, China University of petroleum (Beijing), Beijing, 102202, China |
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| Abstract: | Based on Kuo and Dai's vectorial wave-field extrapolation equations, we derive new Kirchhoff migration equations by introducing unit vectors which represent the ray directions at the imaging points of the reflected P- and PS converted-waves. Furthermore, using the slope of the events on shot records and a ray racing procedure, mirror-image reflection points are found and the reflection data are smeared along the Fresnel zone. The migration method proposed in this paper solves two troublesome imaging problems caused by limited receiving aperture and migration artifacts resulting from wave propagation at the velocities of non original wave type. The migration method is applied successfully with model data, demonstrating that the new method is effective and correct. |
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| Keywords: | Elastic Kirchhoff migration vectorial wave-field Fresnel zone P-wave PS converted wave polarization |
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