绕射深度偏移

本文提出一种按速度模型计算绕射波射线旅行时和进行绕射归位的方法。偏移归位的结果直接为深度剖面。该法既可用于迭后偏移,也可用于迭前偏移。对地质结构复杂地区,该法可以避免某些不适当的近似假设条件。文中还通过一个理论模型的计算来说明这种方法的效果。

Diffraction depth migration

This paper presents a method for calculating travel time of diffracted wave from velocity model and for making diffraction migration,The result of migrating is depth section, This method can be used in the migration both after and before stack, In areas where geologic structures are complicated,this method may avoid some inappropriate approximate hypothe se s.The paper also illustrates the effect of this method by the calculation and analysis on a theoretical model.