Abstract: The author derives the relationship between incidence angle and offset in the model where the overlaying layer is homogeneous and isotropic medium while the under-cladding layer is anisotropic. Based on the reflection coefficient expressions in Horizontal Transversely Isotropic medium (HTI medium) proposed by Ruger, and inverses the elastic parameters of layers. By comparing the results with other previous methods, it verifies the correctness of the new method and the superiority of the algorithm.

Key words: dipping surface, AVO, anisotropy, the modification of incidence

摘要： 推导中间界面为倾斜界面时, 上覆层为均匀各向同性介质、下伏层为横向各向同性介质(HTI介质)的双层模型中倾斜界面处地震波入射角与炮检距的关系。基于Ruger提出的存在水平界面时均匀各向同性介质下面存在横向各向同性介质(HTI介质)的反射系数表达式, 反演地层的弹性参数。通过将反演结果与前人结果进行对比, 检验了新方法的正确性以及算法的优越性。

关键词: 倾斜界面, AVO, 各向异性, 入射角修正