目前使用的高斯射束偏移(GBM)法,在处理各向同性非均匀介质问题时是有效的 该法以求解射线中心坐标波动方程为基础。本文将该法推广应用于求解各向异性非均匀介质的2D偏移问题,将高斯一射束法由各向同性介质推广到各向异性介质时,需要修改射线追踪的运动学特性。当各向异性介质中的旁轴展开的精度与各向同性介质中的旁轴展开相当时,其射线追踪要比在各向同性介质中慢得 The current Gaussian Beam Offset (GBM) method, which is effective in dealing with isotropic inhomogeneous media problems, is based on solving the center-of-ray coordinate wave equation. In this paper, the method is applied to solve the 2D migration problem of anisotropic heterogeneous media. When the Gaussian beam method is extended from isotropic media to anisotropic media, the kinematics of ray tracing needs to be modified. When the accuracy of paraxial unfolding in anisotropic media is comparable to that of paraxial in isotropic media, its ray tracing is slower than in isotropic media