| 各向异性弹性波有限元叠前逆时偏移 |
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| 引用本文： | 张美根,王妙月.各向异性弹性波有限元叠前逆时偏移[J].地球物理学报,2001,44(5):711-719. |
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| 作者姓名： | 张美根 王妙月 |
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| 作者单位： | 中国科学院地质与地球物理研究所,北京100101;中国科学院地质与地球物理研究所,北京100101 |
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| 基金项目： | 中国科学院重点项目 (KZ95 2 -S1 -41 1 )，中国科学院知识创新工程重大项目 (KZCX -0 7) |
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| 摘 要： | 利用有限元法和最小走时射线追踪的界面点法，实现了各向异性弹性波的叠前逆时偏移.理论模型资料的偏移结果清晰准确，证实了该系统的可靠性.通过对各向异性模型资料的各向同性偏移处理，发现常规偏移剖面存在较大误差，地质体的垂向深度和横向位置与实际模型有偏离.
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| 关 键 词： | 各向异性弹性波 有限元 叠前逆时偏移 射线追踪 吸收边界条件 |
| 文章编号： | 0001-5733(2001)05-0711-09 |
| 收稿时间： | 2000-09-06 |
PRESTACK FINITE ELEMENT REVERSE-TIME MIGRATION FOR ANISOTROPIC ELASTIC WAVES |
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| ZHANG MWTEI-WTGWTENWT,WANG MWTIAO-WTYWTUEWTBX.PRESTACK FINITE ELEMENT REVERSE-TIME MIGRATION FOR ANISOTROPIC ELASTIC WAVES[J].Chinese Journal of Geophysics,2001,44(5):711-719. |
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| Authors: | ZHANG MWTEI-WTGWTENWT WANG MWTIAO-WTYWTUEWTBX |
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| Institution: | Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China)JZ |
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| Abstract: | WTBased on the finite element method and the interface point method of shortest path ray tracing, reverse-time migration for anisotropic elastic waves is carried out. The migrated sections of model data are clear and accurate. This demonstrates the reliability of the migration system. The isotropic migration of the data of anisotropic models shows that there are considerable errors on traditional migration sections where the positions of geological bodies are inconsistent with those in the real models. |
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| Keywords: | WTZK(Anisotropic elastic wave Finite element method Prestack reverse-time migration Ray tracing Absorbing boundary condition |
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