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根据横向各向同性介质（TransverselyIsotropy，TI）中P波和SV波的相速度公式，在沿垂直对称轴方向的近似条件下，讨论了提取TI介质中速度参数的方法，所给出的公式可以用常规的动校正速度分析方法及相应的软件实现。实际中，小井源距多波VSP观测的直达波满足这种沿垂直对称轴方向的近似条件，因此本方法具有重要的实际意义。
According to the formula of phase velocity of P wave and SV wave in transversely isotropic medium (TI), the method of extracting velocity parameter in TI medium is discussed under the condition of vertical axis of symmetry. The formulas given are Using conventional dynamic correction speed analysis method and the corresponding software. In practice, the direct wave from a well of a small well VSP observes the approximate condition along the vertical axis of symmetry, so this method is of great practical significance.