面波压制方法与道间距关系的数值分析

野外无检波器组合的采集方式使得面波的压制成为单点高密度地震数据处理的关键。F-K滤波、τ-p变换是两种常用的压制面波的方法,这两种方法压制面波的效果与道间距有关。对面波速度、频率、射线参数与道间距关系的数值分析发现,道间距越小,压制面波的效果越好;大道间距会产生假频而使得面波难以有效地滤除。这从另一侧面也证明这两种方法可以更好地压制高密度地震数据中的面波。 

Numerical analysis of surface wave suppression and channel interval

Suppressing surface wave is a key procedure during seismic data processing,especially for the sin-gle-sensor and high-density acquisition,because no sensors are arrayed in the field.The F-K filtering and τ-p transform are two better methods to suppress noise of surface wave.And suppression results depend on the spatial sampling interval.Through the numerical simulation and analysis on the relationship between surface wave veloc-ity,frequency,ray parameter and the interval of receivers,it can be found that smaller interval is,the better the ef-fect while de-noising the surface wave.Moreover,alias will disturb the signals in case of large interval sampling.On the other hand,it can be deduced that fine spatial sampling is helpful to suppress surface wave in high density acquisition.