Migration of multi‐component elastic data in anisotropic models is difficult and has not been reasonably addressed. Thus we test three‐dimensional ray‐based Kirchhoff pre‐stack depth scalar migration and calculate migrated sections in a simple anisotropic velocity model. We generate ray‐theory seismograms for separate phases of reflected P, S1, S2 and converted waves. The velocity model is composed of two homogeneous layers and one curved interface. The anisotropy of the upper layer is triclinic and the bottom layer is isotropic. We apply a scalar imaging separately to each component of the elementary wave in a single‐layer velocity model with the same triclinic anisotropy as in the upper layer of the velocity model used to calculate the recorded wave field. Results of Kirchhoff pre‐stack depth scalar migration indicate big differences for individual elementary wave components. We observe very good migrated interface for all three components of reflected PP wave, radial component of PS1 converted wave and transversal component of PS2 converted wave. For other components and elementary waves, the migrated interface is imaged, only partially, correctly.

中文翻译：

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简单三斜速度模型中基尔霍夫叠前深度标量偏移的三分量P，S1，S2和转换波

各向异性模型中多分量弹性数据的迁移是困难的，尚未得到合理解决。因此，我们测试了基于射线的三维Kirchhoff叠前深度标量偏移，并在简单的各向异性速度模型中计算了偏移的截面。我们为反射的P，S1，S2和转换波的单独相位生成射线理论地震图。速度模型由两个均匀层和一个弯曲界面组成。上层的各向异性是三斜的，底层是各向同性的。我们对单层速度模型中的基本波的每个分量分别应用标量成像，并具有与用于计算记录波场的速度模型的上层相同的三斜各向异性。基尔霍夫叠前深度标量偏移的结果表明，各个基本波分量存在很大差异。我们观察到反射PP波的所有三个分量，PS1转换波的径向分量和PS2转换波的横向分量的迁移界面都非常好。对于其他成分和基本波，仅部分正确地对迁移的界面进行了成像。