基于含可变因子S变换的面波压制技术
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摘要
在原始的地震记录中,压制面波可以提高地震信噪比。在S变换和广义S变换的基础上,提出了含可变因子的S变换,利用这种方法压制地震记录中的面波成份。首先将地震记录通过含可变因子的S变换变换到时频域,在时频域中压制面波的成份,再变换回时间域,其结果就是滤掉面波的地震信号。针对这一方法,提出了实施流程,并将其应用于实际资料中。其应用效果表明,该方法能有效地压制面波,并保留了地震记录的反射波记录,具有适应性强,效果好等特点。
In the original earthquake records,suppressing surface wave interference can improve the seismic signal to noise ratio.On the basis of S transform and generalized S transform,this paper proposes S-transform with variable factor and applied it to suppress surface waves in the seismic record component.Firstly,applying the S-transform with variable factor transforms seismic signal from time domain to time-frequency domain.Then in the time-frequency domain,suppress surface wave components.Finally,transform back to the time domain and the result is filtered out of surface wave seismic signals.Flow chart of surface wave suppression is given and according to the technique,the authors put it into actual data.The results show that the method suppresses surface wave and preserves other characters of seismic data effectively,and have good adaptability and effect.
In the original earthquake records,suppressing surface wave interference can improve the seismic signal to noise ratio.On the basis of S transform and generalized S transform,this paper proposes S-transform with variable factor and applied it to suppress surface waves in the seismic record component.Firstly,applying the S-transform with variable factor transforms seismic signal from time domain to time-frequency domain.Then in the time-frequency domain,suppress surface wave components.Finally,transform back to the time domain and the result is filtered out of surface wave seismic signals.Flow chart of surface wave suppression is given and according to the technique,the authors put it into actual data.The results show that the method suppresses surface wave and preserves other characters of seismic data effectively,and have good adaptability and effect.
引文
[1]陈爱萍,邹文.基于S-变换的面波压制技术研究[J].地质世界,2009,24(1):82-86.
[2]陈友良.时频分析在地震信号处理中的研究及应用[D].长沙:中南大学,2011.
[3]STOCKWELL R G,MANSINHA L,LOWE R P.Lo-calization of the complex spectrum the S transform[J].IEEE Transactions on Signal Processing,1996,44(4):998-1001.
[4]张晓峰.基于广义S变换的地震资料信噪分离方法[J].物探化探计算技术,2010,32(5):480-483.
[5]段俊,张白林,潘树林.广义S变换去除面波技术及应用[J].物探化探计算技术,2011,33(3):280-285.
[6]MANSINHA L,SToCKWELL R G.Local S-spec-trum analysis of 1-D and 2-D data[J].Physics ofthe Earth and Plantetary Interiors,1997,103(3):329-336.
[7]PINNEGAR C R,MANSINHA L.The s transformwith windows of arbitrary and varying shape[J].Geo-physics,2003,68(1):381-385.
[8]PINNEGAR C R,MANSINHA L.Time-local spec-tral analysis for non-stationary time series:the S-transform for noisy signals[J].Fluctuation and NoiseLetters,2003,3(3):357-364.
[9]高静怀,陈文超,李幼铭,等.广义S变换与薄互层地震响应分析[J].地球物理学报,2003,46(4):526-532.
[10]周竹生,陈友良.含可变因子的广义S变换及其时频滤波[J].煤炭地质与勘探,2011,39(6):63-71.
[11]柏晨,肖泽龙,许建中.基于广义解调和广义S变换的时频域去噪方法[J].探测与控制学报,2011,33(4):28-33.
[12]赵淑红,朱光明.S变换时频滤波去噪方法[J].石油地球物理勘探,2007,42(4):402-408.
[13]陈学华,贺振华,黄德济.基于广义S变换的信号提取与抑噪[J].成都理工大学学报:自然科学版,2006,33(4):331-335.
[2]陈友良.时频分析在地震信号处理中的研究及应用[D].长沙:中南大学,2011.
[3]STOCKWELL R G,MANSINHA L,LOWE R P.Lo-calization of the complex spectrum the S transform[J].IEEE Transactions on Signal Processing,1996,44(4):998-1001.
[4]张晓峰.基于广义S变换的地震资料信噪分离方法[J].物探化探计算技术,2010,32(5):480-483.
[5]段俊,张白林,潘树林.广义S变换去除面波技术及应用[J].物探化探计算技术,2011,33(3):280-285.
[6]MANSINHA L,SToCKWELL R G.Local S-spec-trum analysis of 1-D and 2-D data[J].Physics ofthe Earth and Plantetary Interiors,1997,103(3):329-336.
[7]PINNEGAR C R,MANSINHA L.The s transformwith windows of arbitrary and varying shape[J].Geo-physics,2003,68(1):381-385.
[8]PINNEGAR C R,MANSINHA L.Time-local spec-tral analysis for non-stationary time series:the S-transform for noisy signals[J].Fluctuation and NoiseLetters,2003,3(3):357-364.
[9]高静怀,陈文超,李幼铭,等.广义S变换与薄互层地震响应分析[J].地球物理学报,2003,46(4):526-532.
[10]周竹生,陈友良.含可变因子的广义S变换及其时频滤波[J].煤炭地质与勘探,2011,39(6):63-71.
[11]柏晨,肖泽龙,许建中.基于广义解调和广义S变换的时频域去噪方法[J].探测与控制学报,2011,33(4):28-33.
[12]赵淑红,朱光明.S变换时频滤波去噪方法[J].石油地球物理勘探,2007,42(4):402-408.
[13]陈学华,贺振华,黄德济.基于广义S变换的信号提取与抑噪[J].成都理工大学学报:自然科学版,2006,33(4):331-335.
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