基于频率约束的能量置换面波压制技术

Energy replacement surface wave suppression technique based on frequency constraint

随着油气勘探工作的不断深化,地震资料处理中对地震低频信息重要性的认识越来越深入.低频面波在地震资料处理中作为一种干扰波,常规的区域滤波去除方法,在去除面波干扰的同时,面波区域内有效信号的低频信息也相应得到去除.本文提出的基于频率约束的能量置换面波压制技术,其基本思想是依据面波与有效信号在频率及能量两方面的差异,在面波频宽内对面波进行有效压制.这种方法不仅保证了面波的压制效果,而且几乎不损失面波区域内的低频有效信号,在实际资料的应用中得到了良好的应用效果.

With the development of oil and gas exploration,the understanding about importance of low frequency information in seismic data processing is deeper increasingly. Low frequency surface wave is used as a kind of interference wave in seismic data processing. The low frequency information of the effective signal near the surface wave is also removed at the same time in the conventional regional filtering method. The energy replacement surface wave suppression technique based on frequency constraint had been proposed in this paper,its basic idea was suppressing surface wave in the frequency range of surface wave according to the differences of frequency and energy between surface wave and effective signal. This method not only guaranteed the suppression effect of surface wave,but also kept the low frequency effective signal in the area of surface wave without hurt. Good results had been obtained in the practical application.