摘要
本文详细阐述了三维锥形滤波与二维视速度滤波方法存在差异的原因,分析了影响三维锥形滤波效果的因素,据此设计的锥形滤波器滤除面波,取得了很好的效果。三维锥形滤波的最大优势在于充分利用了地震信号的空间分布特征,在选择合适的速度参数条件下,可以在去除面波干扰的同时,最大程度地保留地震波有效反射信号。
Making full use of the apparent velocity difference between seismic reflection signal and linear interference in three dimensions,the three dimensional cone filtering could obtain an effective suppression of surface waves.This filtering approach first transforms seismic data from time-space domain to frequency-wavenumber domain with three dimensional Fourier transform,and then designs a cone filter to suppress surface waves with low apparent velocity in order to preserve signals.Compared to the conventional two dimensional apparent velocities filtering,the three dimensional cone filtering uses the space distribution of seismic signal and chooses reasonable velocity values.So it could fully remove surface waves and preserve seismic signals.Moreover,for hyperbolic surface waves of far offsets in three dimension geometry,this cone filtering can also obtain good result for remove of surface waves,but the conventional two dimensional apparent velocity filtering cannot.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2012年第5期705-711,844+676,共7页
Oil Geophysical Prospecting
关键词
三维锥形滤波
十字交叉排列
面波
去噪
频率—波数域
three dimensional cone filtering,cross spread,surface wave,denoising,frequency-wavenumber domain
