在计算机上进行时-深转换,可利用下面公式直接计算各CDP点叠加道深度值 z=v(t_o)·t_o 式中v(t_o)为工区内速度随深度的变化规律,可由速度谱、地震测井等资料求得,在此作为已知条件。如果在一条测线或一个工区内速度的横向变化极小或者没有变化,那么直接用上式计算各道不同时刻的深度值,就存在大量的重复运算。假如一张叠加后的记 The time-depth conversion can be performed on the computer by directly calculating the superimposed depth value of each CDP point z = v (t_o) · t_o where v (t_o) is the velocity variation with depth in the work area and can be calculated by the velocity spectrum, Seismic logging data obtained, known as the conditions here. If there is little or no change in the lateral velocity in a survey line or a work area, a large number of repetitive calculations will be performed by directly calculating the depth values ​​of the various paths at different times. If a superposition of mind