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三维地震空间采样间隔偏大造成面波往往存在假频,给面波压制方法带来困难。本文提出对地震记录进行线性相移处理,解决假频面波与有效信号FK_XK_Y域混叠的问题;通过相位滤波和FK_XK_Y滤波逐次衰减面波能量,对存在空间假频的面波能量具有较好的压制效果。理论模型数据和实际数据处理表明:基于相移和相位滤波的面波压制方法能够消除面波及其假频能量,同时保护了有效信号低频能量。
The oversampling interval of 3D seismic space causes the aliasing frequently to have aliasing frequency, which brings difficulties to the surface wave suppression method. In this paper, we proposed a linear phase shift processing for seismic records to solve the aliasing problem between aliasing surface wave and effective signal FK_XK_Y domain. By phase attenuation and FK_XK_Y filtering, the surface wave energy is attenuated successively, which has a good effect on surface wave energy with spatial aliasing The suppression effect. Theoretical model data and actual data processing show that surface wave suppression method based on phase shift and phase filtering can eliminate surface wave and its aliasing energy while protecting the low frequency energy of effective signal.