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贵刊从1977年以来,陆续介绍了许多有关波动方程偏移的文章,虽源皆出自克莱鲍特(claerbout)等的文章及有关文献,但理解不一,造成了混乱。有几个问题提出,供讨论。 1.关于用于水平迭加剖面向下延拓的基本方程问题。马氏等在贵刊1977年第5期、第6期和1978年第1期发表的文章中,都用了下述变换来导出上行波方程或在三维偏移中用下述变换来导出上行波方程并用以作为将地震水平迭加剖面向下延拓的基本方程,笔者认为这是不合适的,因为我们看到,在所有文章中的边界条件都是以地面(水平迭加)记录作为τ=0时的边界波场
Since 1977, your magazine has introduced many articles about the migration of wave equations. Although the sources are all from claerbout and other related articles, they have different understandings and have caused confusion. Several questions have been raised for discussion. 1. On the basic equations for the downward continuation of the horizontal superposition profile. Marshall et al., In the articles published in your issue no. 5, no. 6, 1977, no. 1, 1977, use the following transformations to derive the upgoing wave equation or to derive the upwards Wave equation and used it as a basic equation for downward continuation of the seismic horizontal superimposed section, which I think is not suitable because we see that the boundary conditions in all the articles are recorded as ground (horizontal stacking) Boundary wavefield at τ = 0