| 基于波前构建法的TTI介质射线追踪 |
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| 引用本文： | 白海军,孙赞东,王学军.基于波前构建法的TTI介质射线追踪[J].石油地球物理勘探,2011(Z1):1-6,163,166. |
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| 作者姓名： | 白海军 孙赞东 王学军 |
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| 作者单位： | 中国石油大学(北京)地质地球物理综合研究中心;中海油深圳分公司研究院;东方地球物理公司研究院; |
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| 基金项目： | 国家重点基础研究发展规划973项目(2011CB201103)“中国西部叠合盆地深部有效碳酸盐岩储层形成机制与分布预测”; 国家油气重大专项(2011ZX05004003)“海相碳酸盐岩储层地震描述与油气藏有效预测技术研究”资助 |
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| 摘 要： | 射线(群速度)方向与旅行时梯度(相速度)方向不一致,使得TTI介质的射线追踪变得非常困难。传统的以弹性参数表示的各向异性射线追踪系统比各向同性条件下要复杂得多,而且在每一步都要求通过解特征值问题来计算极化矢量,使得整个射线追踪过程相当耗时。鉴于此,本文引入一种用相速度和群速度重构的射线追踪系统,该射线追踪系统与各向同性条件下的完全相似,从而简化了TTI介质的射线追踪问题。在综合考虑多种走时计算方法的优劣后,选择波前构建法进行射线追踪和波前传播的计算。将简化的射线追踪系统与波前构建法的优势相结合,得到了简单、高效的TTI介质射线追踪方法,并通过模型试算验证了此法的可行性。
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| 关 键 词： | TTI介质 射线追踪 射线追踪系统 波前构建法 |
Raytracing in TTI media using wavefront construction |
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| Bai Hai-jun,Sun Zan-dong , Wang Xue-jun..Lab for Integration of Geology , Geophysics,China University of Petroleum,Beijing,China.Research Institute of CNOOC Shenzhen Ltd.,Guangzhou,Guangdong,China.Geophysical Research Institute,BGP Inc.Zhuozhou,Hebei,Chin.Raytracing in TTI media using wavefront construction[J].Oil Geophysical Prospecting,2011(Z1):1-6,163,166. |
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| Authors: | Bai Hai-jun Sun Zan-dong Wang Xue-junLab for Integration of Geology Geophysics China University of Petroleum Beijing ChinaResearch Institute of CNOOC Shenzhen Ltd Guangzhou Guangdong ChinaGeophysical Research Institute BGP IncZhuozhou Hebei Chin |
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| Affiliation: | Bai Hai-jun1,2,Sun Zan-dong1 and Wang Xue-jun3.1.Lab for Integration of Geology and Geophysics,China University of Petroleum(Beijing),Beijing,102249,China2.Research Institute of CNOOC Shenzhen Ltd.,Guangzhou,Guangdong,510240,China3.Geophysical Research Institute,BGP Inc.Zhuozhou,Hebei,072751,Chin |
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| Abstract: | The direction of ray(group velocity) and that of traveltime gradient(phase velocity) are not the same,making raytracing in TTI media rather difficult.The traditional raytracing system formulated in terms of elastic parameters in the anisotropiy is more complicated than that in the isotropic case.Furthermore,an eigenvalue problem for polarization vectors has to be solved at every ray step.As a result,raytracing in TTI media is always time consuming.Considering all the difficulties mentioned above,a kind of r... |
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| Keywords: | TTI media raytracing raytracing system wavefront construction method |
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