对某一反射而言,实测地震旅行时扰动既可以是地面与反射层间速度异常带引起,也可以是反射层本身构造变化引起的。这种速度-深度的不确定性可按线性估值理论表述。其做法是综合现有与速度-深度不确定性有关的结果,提出改进方法,使深度转换解的稳定性提高。为便于分析,我们求解一个相对简单的问题,即单个反射层之上为一速度可变层,得出如下结论:1)速度-深度不确定性是由旅行时误差引起的,只要不存在横向速度变化(或速度变化很慢)这种不确定性即可 For a reflection, the measured disturbance during the earthquake trip may be caused by the anomalous velocity band between the ground and the reflection layer, or caused by the structural change of the reflection layer itself. This speed-depth uncertainty can be expressed in terms of linear estimates. The approach is to synthesize the existing results related to speed-depth uncertainty and propose an improved method to improve the stability of the deep-shift solution. To facilitate the analysis, we solve a relatively simple problem, that is, a variable velocity layer above a single reflection layer, and draw the following conclusions: 1) Velocity-depth uncertainty is caused by travel-time errors as long as there is no lateral This change of speed (or slow speed changes) can be such an uncertainty