基于Gabor变换自适应噪声衰减  

High amplitude noise attenuation based on Gabor transform

作　　者：崔树果[1] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院南京石油物探研究所,江苏南京210014

出　　处：《勘探地球物理进展》2009年第6期432-434,444,共4页Progress in Exploration Geophysics

基　　金：国家863课题"高密点地震提高分辨率和信噪比技术"(2006AA06Z205)资助;国家科技重大专项"煤层气地震采集与处理技术研究"(2008ZX05035-003)资助

摘　　要：地震记录往往受高能噪声的影响使有效信号淹没在噪声中,使地震资料的信噪比降低。针对高能噪声(尖脉冲、面波和声波等)的特点,提出了利用Gabor变换将地震数据变换到时间-频率域中,在三维空间(时间-空间-频率)对信号进行刻画,然后在局部范围内对数据进行处理的方法。实际资料处理表明该方法能有效衰减高能噪声并保护有效波。In the seismic records,high amplitude noises such as ground roll and noise bursts is very strong,and may immerse primary waves and reduce signal-to-noise ratio.A method of adaptive time-frequency noise attenuation based on Gabor transform is designed to isolate and attenuate localized high amplitude noises in seismic data.After localization,the noises are identified and eliminated.Application to real data proves the effectiveness of the proposed method in attenuating high amplitude noises and protecting significant waves.

关 键 词：面波 尖脉冲噪声 GABOR变换 自适应衰减 局部刻画 

分 类 号：P631.4[天文地球—地质矿产勘探]