| 基于三角网格的有限差分法叠后逆时偏移 |
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| 引用本文： | 郭书娟,李振春,孙小东,叶月明,滕厚华,李芳.基于三角网格的有限差分法叠后逆时偏移[J].应用地球物理,2008,5(2):115-120. |
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| 作者姓名： | 郭书娟 李振春 孙小东 叶月明 滕厚华 李芳 |
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| 作者单位： | 中国石油大学(华东)地球资源与信息学院，中国石油大学(华东)地球资源与信息学院，中国石油大学(华东)地球资源与信息学院，中国石油大学(华东)地球资源与信息学院，中国石油大学(华东)地球资源与信息学院，中国石油大学(华东)地球资源与信息学院 山东东营 257061，山东东营 257061，山东东营 257061，山东东营 257061，山东东营 257061，山东东营 257061 |
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| 基金项目： | 国家自然科学基金
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国家高技术研究发展计划(863计划)
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国家重点基础研究发展计划(973计划)
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CNPC Geophysical Key Laboratory of the China University of Petroleum East China Research Department |
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| 摘 要： | Compared with other migration methods, reverse-time migration is based on a precise wave equation, not an approximation, and performs extrapolation in the depth domain rather than the time domain. It is highly accurate and not affected by strong subsurface structure complexity and horizontal velocity variations. The difference method based on triangular grids maintains the simplicity of the difference method and the precision of the finite element method. It can be used directly for forward modeling on models with complex top surfaces and migration without statics preprocessing. We apply a finite difference method based on triangular grids for post-stack reverse-time migration for the first time. Tests on model data verify that the combination of the two methods can achieve near-perfect results in application.
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| 关 键 词： | 逆时偏移 构造倾角 三角网格 起伏地表 |
| 修稿时间： | 2007年10月7日 |
Post-stack reverse-time migration using a finite difference method based on triangular grids |
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| Shujuan?Guo,Zhenchun?Li,Xiaodong?Sun,Yueming?Ye,Houhua?Teng,Fang?Li.Post-stack reverse-time migration using a finite difference method based on triangular grids[J].Applied Geophysics,2008,5(2):115-120. |
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| Authors: | Shujuan Guo Zhenchun Li Xiaodong Sun Yueming Ye Houhua Teng Fang Li |
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| Abstract: | Compared with other migration methods,reverse-time migration is based on a precise wave equation,not an approximation,and performs extrapolation in the depth domain rather than the time domain.It is highly accurate and not affected by strong subsurface structure complexity and horizontal velocity variations.The difference method based on triangular grids maintains the simplicity of the difference method and the precision of the finite element method.It can be used directly for forward modeling on models with complex top surfaces and migration without statics preprocessing.We apply a finite difference method based on triangular grids for post-stack reverse-time migration for the first time.Tests on model data verify that the combination of the two methods can achieve near-perfect results in application. |
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| Keywords: | reverse-time migration structural complexity triangular grids finite difference |
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