二维波场变换及VSP波场分离

2-D WAVEFIELD TRANSFORM AND VSP WAVEFIELD SEPARATION

胜利油田物探公司,东营257100

Geophysical Company, Shengh Oil Field, Dungying 257100

二维波场变换主要是二维傅里叶变换和τ-p变换。利用傅里叶投影定理可以把这两种变换联系起来,形成一个可逆序列的二维波场变换。在这个变换过程中,t-z域数据可沿两条路径变换到ω-k域、ω-p域和τ-p域。本文介绍的一套软件实现了上述可逆序列二维波场变换。把这一套软件用于VSP波场分离,取得了较好的效果。

2-D wavefield transform usually has two forms: Fouier transform and τ-p transform. Using Fourier projection theorem,the two transforms can be linked to form another 2-D wavefield transform of reversible series. In which,t-z domain data can be transformed into either ω-k domain,ω-p domain or τ-p domain along two paths.This paper introduces a software package used for the 2-D wavefield transform of reversible series. Satisfactory results are achieved while applied to VSP wavefield separation.