基于二阶统计量的盲提取算法
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摘要
在地震资料处理中为保证初至拾取结果的正确性,一般先降噪后再进行自动拾取或者手工拾取。普通降噪方法大多都是以牺牲部分有效信号为代价,而且必须满足一定的信噪比的时候才能有效。本文将盲提取技术引入了降噪处理。其关键着眼于分离而非切除噪声,因此在去除噪声的时候不损伤有效信号,为降噪处理提供了一种新思路。文中提出了一种基于二阶统计量的去除干扰波的盲提取算法,通过这种算法可以提取出去除了干扰后的地震数据,对实际地震资料的处理表明:这种算法可以去除干扰波、有效地压制噪声,达到了提高初至拾取精度的目的。
Noise reduction usually is conducted before first arrivals picking,which could damage effective signals.This article proposes an algorithm of blind source separation based on the second-order statistics.The method focuses on noise separation rather than noise removal.So there are no harms to effective signals.This idea might provide a new way for noise reduction.The algorithm of blind source separation based on the second-order statistics is applied to seismic data.The results show that the algorithm is effect,noises are separated and removed,and accurate first arrivals are picked up.
Noise reduction usually is conducted before first arrivals picking,which could damage effective signals.This article proposes an algorithm of blind source separation based on the second-order statistics.The method focuses on noise separation rather than noise removal.So there are no harms to effective signals.This idea might provide a new way for noise reduction.The algorithm of blind source separation based on the second-order statistics is applied to seismic data.The results show that the algorithm is effect,noises are separated and removed,and accurate first arrivals are picked up.
引文
[1]夏洪瑞,陈德刚,周开明.地震资料处理中随机干扰消除方法分析.石油物探,2003,42(1):93~96Xia Hong-rui,Chen De-gang,Zhou Kai-ming.Randomnoise eli mination in seismic data processing.GPP,2003,42(1):93~96
[2]夏洪瑞,周开明.地震资料处理中相干干扰消除方法分析.石油物探,2003,42(4):526~528,549Xia Hong-rui,Zhou Kai-ming.Coherent noise eli mina-tionin seismic data processing.GPP,2003,42(4):526~528,549
[3]Erdogmus D,Rao Y N et al.Si multaneous extractionof principal components using givens rotations and out-put variances.IEEE International Conference on A-coustics.Speech,and Signal Processing,(ICASSP’02):V1069~V1072
[4]Tong L,Liu R W,Soon V C et al.Indeterminacy andidentifiably of blind identification.IEEE Transactionson Circuits and System1991,38:499~509
[5]Shindo H,Hirai Y.Blind source separation by a geo-metrical method.Proceedings of the2002Interna-tional Joint Conference on Neural Net works,2002,2:1109~1114
[6]Eric H Anderson,Fumo E H,Erwin J P R S.Satelliteultraquiet isolation technology experi ment(SUITE).Aerospace Conference,Proceedings IEEE,2000,19~25
[2]夏洪瑞,周开明.地震资料处理中相干干扰消除方法分析.石油物探,2003,42(4):526~528,549Xia Hong-rui,Zhou Kai-ming.Coherent noise eli mina-tionin seismic data processing.GPP,2003,42(4):526~528,549
[3]Erdogmus D,Rao Y N et al.Si multaneous extractionof principal components using givens rotations and out-put variances.IEEE International Conference on A-coustics.Speech,and Signal Processing,(ICASSP’02):V1069~V1072
[4]Tong L,Liu R W,Soon V C et al.Indeterminacy andidentifiably of blind identification.IEEE Transactionson Circuits and System1991,38:499~509
[5]Shindo H,Hirai Y.Blind source separation by a geo-metrical method.Proceedings of the2002Interna-tional Joint Conference on Neural Net works,2002,2:1109~1114
[6]Eric H Anderson,Fumo E H,Erwin J P R S.Satelliteultraquiet isolation technology experi ment(SUITE).Aerospace Conference,Proceedings IEEE,2000,19~25
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