| 地震波旅行时计算 |
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| 引用本文： | 王华忠,方正茂.地震波旅行时计算[J].石油地球物理勘探,1999,34(2):155-163. |
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| 作者姓名： | 王华忠 方正茂 |
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| 作者单位： | [1]同济大学海洋地质与地球物理系 [2]胜利石油管理局计算中心 |
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| 基金项目： | 国家自然科学基金，大庆石油管理局联合资助 |
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| 摘 要： | 地震波旅行时计算是Ｋｉｒｃｈｈｏｆｆ积分法叠前深度偏移成像的核心内容，其精度决策着最终偏移成像的效率和效果。另外，在射线理论正演中，旅行时计算的精度也决定着其其振幅计算的准确程度，因此，它受到众多学者的关注。
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| 关 键 词： | 地震波旅行时 计算精度 地震勘探 地震数据 |
Computation of seismic travel time |
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| Wang Huazhong.Computation of seismic travel time[J].Oil Geophysical Prospecting,1999,34(2):155-163. |
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| Authors: | Wang Huazhong |
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| Abstract: | The computation of seismic travel time is a core matter of prestack depth migration using Kirchhoff integration, and its accuracy decides the efficiency and effect of final migration. In addition, in theoretical forward of seismic ray, travel time accuracy determines amplitude accuracy. Therefore, multitudinous geophysicists pay attention to travel time accuracy.Having analysed and compared several typical methods for travel time computation (finite difference method, linear interpolation method and so on ), authors details their respective advantages and application spheres. The approximate estimation method for spherical-wave travel time is discussed in detail, and Schneider method is improved in its realization procedure. Modeling computation proves respectively the tomographic effects of approximate methods for estimating travel times of spherical wave and plane wave. |
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| Keywords: | seismic travel time plane wave approximation spherical wave approximation linear interpolation ray tracing computation accuracy |
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