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本文讨论了由具有垂向不均匀性的介质层构成的水平层状介质中反射波法的数学模型及其一般特性;研究了多道地震信号的最佳估计以及因之而提出的反射波时距曲线段的拟合问题;分析了水平迭加速度和视t_0时间的特性,并指出射线均方根速度是一种极限的水平叠加速度;阐明了偏移距太小时,多次叠加效果不好的原因,并论证了最佳反射叠加段的存在;用理论计算进行了验证.最后,一般地讨论了介质层的垂向不均匀性的识别和确定.
This paper discusses the mathematic model and general characteristics of reflection wave method in horizontal layered media composed of medium layers with vertical inhomogeneity. The optimal estimation of multi-channel seismic signals and the proposed reflection wave are studied The fitting problem of curve segments is analyzed. The characteristics of horizontal superposition velocity and apparent time t_0 are analyzed, and the radial root mean square velocity is a limit horizontal superposition velocity. It is clarified that when the offset is too small, the effect of multiple superpositions is not good The reason of the existence of the optimal reflection superposition section is verified and verified by theoretical calculation.Finally, the recognition and determination of the vertical inhomogeneity of the dielectric layer are discussed in general.