小波变换衰减面波与受损信号的幅度补偿

Using Wavelet Transform Surpressing Ground roll and Amplititude Compensation for the Loss of Seismic Signal

以陆上地震勘探中普遍存在的面波干扰为衰减对象，对影响一维小波变换衰减面波效果的因素进行了讨论。指出小波变换在满足完全重构的条件下，所使用的２个滤波器的截止频率可调与否是决定抑制高、低频干扰效果的主要因素。针对受面波干扰影响的地震信号的能量较弱的现象，提出了对受损部位的地震信号进行波形幅度补偿的方法。经实际地震资料处理证明，对受损信号进行波形幅度补偿，对提高叠前地震资料的信噪比具有明显的效果。

Influencing factors of wavelet transform on surpressing ground roll are discussed It is shown that main factors of surpressing the disturbance of high and low frequency are the cutoff frequency of two filters under the condition of reconstructing wavelet transform Based on the fact that the enengy of seismic signal influenced by ground roll disturbance is relatively weak,a method of waveform amplititude compensation for the loss of seismic signal is proposed It is proved that waveform amplititude compensation for the loss of seismic has obvious effect on increasing signal signal/noise ratio of perstack seismic data