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基于混合网格剖分的起伏地表旅行时计算
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摘要
射线追踪方法是指给定激发点和接收点的位置及地层介质的速度,从而求取激发点到接收点间的射线路径及旅行时,射线追踪求取的射线路径和计算旅行时的精度直接影响着偏移成像、速度分析、走时反演和层析成像的质量。因此,研究快速且更高精度的射线追踪方法,对于解决层析成像等地震波场模拟问题有着重要意义。旅行时线性插值法(LTI)在计算初至波旅行时和射线路径时具有计算原理简单,效率高等特点,得到了广泛应用。
Ray tracing method is refers to the position and stratum medium and receiving points given point excitation rate, to calculate the excitation to the ray path and travel between the receiving point, ray tracing the ray path and calculate the travel time accuracy directly affects the migration imaging, traveltime inversion, velocity analysis and tomographic imaging quality. Therefore, the research of fast and high precision of ray tracing method, for solving tomographic seismic wave field simulation problem has important significance. The travel time linear interpolation method(LTI) to the traveltime and ray path in the calculation of beginning with simple calculation principle, high efficiency, has been widely applied.
引文
1 Eiichi Asakawa E,Kawanaka T.Seismic ray tracing using linear traveltime interpolation[J].Geophysical Prospecting,1993,41:99-111
    2周洪波,张关泉.复杂构造区域的初至波走时计算[J].地球物理学报,1994,37(4):515-520
    3 Saito H.3D ray tracing method based on Huygens’principle[C].60th Annual International Meeting,SEG,Expanded Abstracts,1990:1024-1027

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