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本文从地震地层学观点出发设想地层剖面,不论其地质结构如何复杂,都可由代表不同速度层、互不相同的速度模块拼接而成。于是研究地震射线在介质中的分布就是研究射线在模块中各个边界上的变化情况。根据折射波的传播规律,对下行波、滑行波、上行波、侧壁转折波和绕射波五种情况进行了讨论。文中附有计算程序流程图和程序的简要说明,并介绍了一个三层模型的正寅算例。
From the perspective of seismic stratigraphy, this paper assumes that the stratigraphic section, no matter how complex its geological structure, can be formed by splicing speed modules representing different velocity layers and different from each other. Therefore, studying the distribution of seismic rays in the medium is to study the changes of rays on the various boundaries of the module. According to the propagation law of the refracted wave, the five situations of the descending wave, the gliding wave, the ascending wave, the turning wave and the diffraction wave on the side wall are discussed. The article is accompanied by a brief description of the flow chart and procedures for the calculation of the program, and introduces a case study of a three-layer model.