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长期以来,地震解释的目的之一就是将时间变换为深度。但常常为缺少一种由时间剖面直接得出深度剖面的方法而遗憾。原因是由于对反射时间起决定因素的界面位置及形态以及层速度等都是未知数。本文将介绍一种在普通条件下,关于上述问题的程序。方法是用迭代法对估算的深度剖面进行修正,以期获得正确的深度剖面。方法取决于输入反射时间与用射线轨迹法从深度剖面得出的反射时间的差值。程序从第一层开始,完成后进行第二层,以此类推。主要假设是无侧向倾斜及每层层速度为深度和水平位置的线性函数。
For a long time, one of the purposes of seismic interpretation is to transform time into depth. However, it is often regrettable that there is a lack of a way to derive depth profiles directly from time profiles. The reason is that the interface position and shape, which determines the reflection time, and the layer velocity are unknown. This article will introduce a common condition, the procedure on the above issues. The method is to iteratively correct the estimated depth profile in order to obtain the correct depth profile. The method depends on the difference between the reflection time of the input reflection time and the reflection time obtained from the depth profile by the ray trace method. The program starts from the first level, completes the second level, and so on. The main assumption is that there is no lateral tilt and the velocity of each layer is a linear function of depth and horizontal position.