压制地震勘探随机噪声的分段时频峰值滤波方法
|
摘要
提高勘探资料信噪比是地震勘探的主要内容之一.本项研究利用短时能量将记录分成能量均衡的若干段,获得减少尺度变换误差的分段时频峰值滤波方法,并运用端点拓展和与地震信号特征匹配的多级时窗参数改进时频峰值滤波精度.理论模型和共炮点资料处理结果表明,分段时频峰值滤波很好地消除了尺度变化误差引起的信号波形阶梯状畸变,能够在压制强随机噪声的同时更好地保留信号特征.对低信噪比勘探资料处理具有较大的应用价值.
It is one of the major subjects of seismic exploration to improve signal to noise ratio of seismic data.The segmented time-frequency peak filtering(S-TFPF)is proposed to reduce the error induced by scale transform of TFPF by dividing a trace of seismic data into some segments with even energy based on the short-time energy principle.Moreover,endpoint delay method is utilized to avoid the endpoint distortion.The multiple time-windowing parameters,which match the characteristics of signal,are also set for the segments.The S-TFPF is applied to synthetic records and common-shot records,and the results show that the method can retain signal characteristics better while suppress the random noise.Segmenting can effectively attenuate distortion of signal caused by scale transform error and can be applied to practical seismic exploration at low SNR.
It is one of the major subjects of seismic exploration to improve signal to noise ratio of seismic data.The segmented time-frequency peak filtering(S-TFPF)is proposed to reduce the error induced by scale transform of TFPF by dividing a trace of seismic data into some segments with even energy based on the short-time energy principle.Moreover,endpoint delay method is utilized to avoid the endpoint distortion.The multiple time-windowing parameters,which match the characteristics of signal,are also set for the segments.The S-TFPF is applied to synthetic records and common-shot records,and the results show that the method can retain signal characteristics better while suppress the random noise.Segmenting can effectively attenuate distortion of signal caused by scale transform error and can be applied to practical seismic exploration at low SNR.
引文
[1] Zang Z J,Klemperer S L.West-east variation in crustal thickness in northern Lhasa block central Tibet,from deep seismic sounding data.Journal of Geophysical Research ,2005,110:B0943
[2] Zhang Z J,Wang G J,Harris J M.Multi-component wavefield simulation in viscous extensively dilatancy anisotropic media.Phys.Earth Planet Inter.,1999,114;25-28
[3] 樊德华.段云卿,张婉等.三维地震勘探抽油机噪声特征分析.石油地球物理勘探,2008,43(6) :662～667 Fan D H,Duan Y Q,Zhang W,et al.Analysis on noise feature of pumping unit in 3 D seismic exploration.Oil Geophysical Prospecting (in Chinese),2008,43 (6) :662～667
[4] 勾丽敏,蔡希玲,刘学伟等.噪声对叠前深度偏移层速度精度的影响分析.石油地球物理勘探,2007,42(2) :1 56～162 Gou I M,Cai X L,Liu X W,et al.Influence analysis of noise on precision of prestack depth migration interval velocity.Oil Geoophysical Prospecting (in Chinese) ,Z007,42 (2) :156～162
[5] Deng X Y,Yang D H,Peng J M,et al.Noise reduction and drift removal using least-squares support vector regression with the implicit bias term.Geophysics,2010,75(6) :119～127
[6] 高静怀,毛剑,满蔚仕等.叠前地震资料噪声衰减的小波域方法研究.地球物理学报,2006,49(4) :1155～1163 Gao J H,MaoJ,Man W S,et al.On the denoisingmethod of prestack seismic data inwavelet domain.Chinese J.Geophys.(in Chinese),2006,49(4) :1155～1163
[7] 张军华,吕 宁,田连玉等.地震资料去噪方法技术综合评述.地球物理学进展,2006,21(2) :546～553 Zhang J H,Lu N,Tian L Y,et al.An overviews of the methods and techniques for seismic data noise attenuation.Progress in Geophysics (in Chinese),2006,21(2) :546～553
[8] 李月,杨宝俊,林红波等.地震勘探时空域双曲滤波因子的特点与提高信噪比的能力.地球物理学报,2008,51(5) :1557～1566 Li Y,Yang B J,Lin H B,et al.Characteristics of hyperbolic time-distance relation filter in seismic prospecting and its ability increasing signal-to0noise ratio.Chinese J.Geophys.(in Chinese),2008,51(5) :1557～1566
[9] Ramesh Neelamani,Anatoly I.Baumstein and Dominique G.Gillard.Coherent and random noise attenuation using the curvelet transform.The Leading Edge ,2008,27(2) :240～248
[10] 陈雨红,杨长春,曹齐放等.几种时频分析方法比较.地球物理学进展,2006,21(4) :1180～1185 Chen Y H,Yang C C,Cao Q F,et al.The comparison of some time-frequency analysis methods.Progress in Geophvsics (in Chinese),2006,21(4) :1180～1185
[11] 李月,杨宝俊,赵雪平等.检测地震勘探微弱同相轴的混沌振子算法.地球物理学报,2005,48(6) :1428～1433 Li Y,Yang B J,Zhao X P,et al.An algorithm of chaotic vibrator to detect weak events in seismic prospecting records.Chinese J.Geophys.(in Chinese),2005,48(6) :1428～1433
[12] Boashash B,Mesbah M.Signal enhancement by time- frequency peak Filtering .IEEE Trans.Signal Processing,2004,52(4) :929～937
[13] 金雷,李月,杨宝俊.用时频峰值滤波方法消减地震勘探资料中随机噪声的初步研究.地球物理学进展,2005,20(3) :724～728 Jin L,Li Y,Yang BJ.Reduction of random noise for seismic data by time-frequency peak filtering.Progress in Geophysics (in Chinese),2005,20(3) :724～728
[14] 林红波,李 月,潘 伟.时频峰值滤波信号增强方法在实际地震资料处理中的应用.吉林大学学报(地球科学版),2007,37(5) :1038～1041 Lin H B,Li Y,Pan W.Application of signal enhancement method based on time-frequency peak filtering to seismic data processing.Journal of Jilin University (Earth Science Edition),2007,37(5) :1038～～1041
[15] Lin Hongbo,Li Yue,Yang Baojun.Recovery of Seismic Events by Time-Frequency Peak Filtering .IEEE ICIP 2007,v-441~v-444
[16] 林红波,李 月,叶文海等.时频峰值滤波去噪技术及其应用.地球物理学进展,2008,23(6) :1953～1957 Lin H B,Li Y,Ye W H,et al.Denoising technique based on time-frequency peak filtering and its application.Progress in Geophysics (in Chinese),2008,23(6) :1953～1957
[17] 李月,林红波,杨宝俊等.强随机噪声条件下时窗类型局部线性化对TFPF技术的影响.地球物理学报,2009,52(7) :1899～1906 Li Y,Lin H B ,Yang B J,et al.The influence of limited linearization of time window on TFPF under the strong noise background.Chinese J.Geophys.(in Chinese),2009,52(7) :1899～1906
[18] Nelson D J,Smith D C.Adaptive interference removal based on concentration of the STFT.Digital Signal Processing ,2006,16(5) :597-606
[19] Cohen L.Time Frequency Analysis.Englewood Cliffs:Prentice Hall,1995
[2] Zhang Z J,Wang G J,Harris J M.Multi-component wavefield simulation in viscous extensively dilatancy anisotropic media.Phys.Earth Planet Inter.,1999,114;25-28
[3] 樊德华.段云卿,张婉等.三维地震勘探抽油机噪声特征分析.石油地球物理勘探,2008,43(6) :662～667 Fan D H,Duan Y Q,Zhang W,et al.Analysis on noise feature of pumping unit in 3 D seismic exploration.Oil Geophysical Prospecting (in Chinese),2008,43 (6) :662～667
[4] 勾丽敏,蔡希玲,刘学伟等.噪声对叠前深度偏移层速度精度的影响分析.石油地球物理勘探,2007,42(2) :1 56～162 Gou I M,Cai X L,Liu X W,et al.Influence analysis of noise on precision of prestack depth migration interval velocity.Oil Geoophysical Prospecting (in Chinese) ,Z007,42 (2) :156～162
[5] Deng X Y,Yang D H,Peng J M,et al.Noise reduction and drift removal using least-squares support vector regression with the implicit bias term.Geophysics,2010,75(6) :119～127
[6] 高静怀,毛剑,满蔚仕等.叠前地震资料噪声衰减的小波域方法研究.地球物理学报,2006,49(4) :1155～1163 Gao J H,MaoJ,Man W S,et al.On the denoisingmethod of prestack seismic data inwavelet domain.Chinese J.Geophys.(in Chinese),2006,49(4) :1155～1163
[7] 张军华,吕 宁,田连玉等.地震资料去噪方法技术综合评述.地球物理学进展,2006,21(2) :546～553 Zhang J H,Lu N,Tian L Y,et al.An overviews of the methods and techniques for seismic data noise attenuation.Progress in Geophysics (in Chinese),2006,21(2) :546～553
[8] 李月,杨宝俊,林红波等.地震勘探时空域双曲滤波因子的特点与提高信噪比的能力.地球物理学报,2008,51(5) :1557～1566 Li Y,Yang B J,Lin H B,et al.Characteristics of hyperbolic time-distance relation filter in seismic prospecting and its ability increasing signal-to0noise ratio.Chinese J.Geophys.(in Chinese),2008,51(5) :1557～1566
[9] Ramesh Neelamani,Anatoly I.Baumstein and Dominique G.Gillard.Coherent and random noise attenuation using the curvelet transform.The Leading Edge ,2008,27(2) :240～248
[10] 陈雨红,杨长春,曹齐放等.几种时频分析方法比较.地球物理学进展,2006,21(4) :1180～1185 Chen Y H,Yang C C,Cao Q F,et al.The comparison of some time-frequency analysis methods.Progress in Geophvsics (in Chinese),2006,21(4) :1180～1185
[11] 李月,杨宝俊,赵雪平等.检测地震勘探微弱同相轴的混沌振子算法.地球物理学报,2005,48(6) :1428～1433 Li Y,Yang B J,Zhao X P,et al.An algorithm of chaotic vibrator to detect weak events in seismic prospecting records.Chinese J.Geophys.(in Chinese),2005,48(6) :1428～1433
[12] Boashash B,Mesbah M.Signal enhancement by time- frequency peak Filtering .IEEE Trans.Signal Processing,2004,52(4) :929～937
[13] 金雷,李月,杨宝俊.用时频峰值滤波方法消减地震勘探资料中随机噪声的初步研究.地球物理学进展,2005,20(3) :724～728 Jin L,Li Y,Yang BJ.Reduction of random noise for seismic data by time-frequency peak filtering.Progress in Geophysics (in Chinese),2005,20(3) :724～728
[14] 林红波,李 月,潘 伟.时频峰值滤波信号增强方法在实际地震资料处理中的应用.吉林大学学报(地球科学版),2007,37(5) :1038～1041 Lin H B,Li Y,Pan W.Application of signal enhancement method based on time-frequency peak filtering to seismic data processing.Journal of Jilin University (Earth Science Edition),2007,37(5) :1038～～1041
[15] Lin Hongbo,Li Yue,Yang Baojun.Recovery of Seismic Events by Time-Frequency Peak Filtering .IEEE ICIP 2007,v-441~v-444
[16] 林红波,李 月,叶文海等.时频峰值滤波去噪技术及其应用.地球物理学进展,2008,23(6) :1953～1957 Lin H B,Li Y,Ye W H,et al.Denoising technique based on time-frequency peak filtering and its application.Progress in Geophysics (in Chinese),2008,23(6) :1953～1957
[17] 李月,林红波,杨宝俊等.强随机噪声条件下时窗类型局部线性化对TFPF技术的影响.地球物理学报,2009,52(7) :1899～1906 Li Y,Lin H B ,Yang B J,et al.The influence of limited linearization of time window on TFPF under the strong noise background.Chinese J.Geophys.(in Chinese),2009,52(7) :1899～1906
[18] Nelson D J,Smith D C.Adaptive interference removal based on concentration of the STFT.Digital Signal Processing ,2006,16(5) :597-606
[19] Cohen L.Time Frequency Analysis.Englewood Cliffs:Prentice Hall,1995
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心