论文部分内容阅读
在各向异性介质中 ,由于地震波的相速度和群速度有较大差异 ,相角和群角不同 ,相速度、群速度及群角与相角之间的关系比较复杂 ,因此与各向同性相比较 ,计算地震波相速度、群速度及群角就更加困难 ,其合成地震记录的难度也就随之增大 .本文根据VTI(具有垂直对称轴的横向各向同性 )介质中地震波的运动学特征 ,应用射线追踪方法 ,计算了VTI介质中的地震波的旅行时 ,并合成了反射波地震记录 .这为反射地震波的旅行时及速度分析提供了基础 .
In anisotropic media, the phase velocities and group angles are different due to the large differences in the phase velocities and group velocities of seismic waves. The relationship between phase velocities, group velocities and group angles and phase angles is rather complicated. Therefore, It is more difficult to calculate the phase velocities, group velocities and cluster angles of the seismic waves, and the difficulty of synthesizing the seismograms also increases.This paper, based on the kinematics of seismic waves in a VTI (transversely isotropic with a vertical axis of symmetry) Feature, the ray tracing method is used to calculate the travel time of the seismic waves in the VTI medium and the reflected seismic records are synthesized, which provides a basis for the travel time and velocity analysis of the reflected seismic waves.