摘要
海上地震勘探采集资料中的点源干扰能量强,横向变化幅度小且出现位置不固定,极大地影响了海上地震资料的成像质量和解释精度。采用了基于形态学的噪声压制技术对点源干扰进行处理,设计了形态学滤波器分离点源噪声和有效信号,实现了点源干扰的压制。采用该方法对模拟地震资料和海上实际地震资料进行处理,并与传统的F-K去噪方法进行了对比,结果表明该方法在成功压制点源绕射干扰的同时,能够较好地保留原始地震信号的低频信息,完全恢复了信号与噪声重叠处的有效信号振幅。处理过程中,该方法不受随机噪声的影响,具有很强的抗随机噪声能力。
The point source diffracted interference in marine seismic data has the characteristics of large energy,narrow lateral variation and non-fixed position,which greatly affect the imaging quality and interpretation accuracy of the marine seismic data.The noise suppression technique based on the morphology is used to suppress point source diffracted noise.The morphologic filters are designed to separate the signal from the noise and complete the suppression of the point source diffracted noise.The proposed morphologic noise attenuation method was tested on simulation data and actual marine seismic data.Compared with the conventional F-K filter techniques,this method shows it can successfully suppress the point source diffracted noise as well as better retain the low frequency information of the original seismic signal.Moreover,it has a full recovery of the signal amplitude at the position where signal and noise overlap.During processing,the method avoids the effect of random noise and has strong ability of resisting random noise.
引文
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