本文描述了在全波实验中所见到的三种现象,即:1.纵横波初至的振幅(绝对值)具有相同的变化规律;2.纵横波初至的相位彼此总是反向的;3.纵横波初至的振幅变化周期为2π。经过充分的分析和解释指出这些现象应该出现在全波测井条件下,从而为利用相位差从全波中提取有用的信息奠定了基础。 This article describes three phenomena seen in full-wave experiments, namely: 1. Amplitude (absolute value) of the first arrival of the longitudinal and transverse waves has the same variation; 2. The phases of the first arrival of the longitudinal and transverse waves are always opposite to each other ; 3. The amplitude of the first arrival of the longitudinal and transverse waves varies by 2π. After sufficient analysis and explanation, it is pointed out that these phenomena should occur under the condition of full-wave logging, which lays the foundation for extracting useful information from the full wave with phase difference.