一种稳健压制陆上三分量地震记录中面波的自适应极化分析方法(英文)
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摘要
针对提高陆上转换波地震资料的品质,为了更好的识别和压制三分量地震记录中的强面波干扰,本文结合复偏振分析和瞬时极化分析,提出了一种能有效压制陆上三分量记录中强面波干扰的自适应极化滤波方法。该方法综合应用了面波椭圆平面偏振、能量强、视速度低以及频带低特征。在给定的面波时窗内低通滤波,采用依赖面波主频的滑动重叠时窗,进行复协方差本征值分解,由主特征向量建立面波模型,利用瞬时极化面积属性和面波区平均能量约束,检测和识别面波,最后自适应减去。这种方法的门槛值稳定,易于选取,适应性强,是一种稳健的极化滤波方法。模型和实际资料的试算结果,表明该方法能有效的识别和衰减面波,能较好地保护有效信号。
To improve the data quality of converted waves, and better identify and suppress the strong ground-roll interference in three-component(3C) seismic recordings on land, we present an adaptive polarization filtering method, which can effectively separate the groundroll interference by combining complex polarization and instantaneous polarization analysis. The ground roll noise is characterized by elliptical plane polarization, strong energy, low apparent velocity, and low frequency. After low-pass filtering of the 3C data input within a given time-window of the ground roll, the complex covariance matrix is decomposed using the sliding time window with overlapping data and length that depends on the dominant ground-roll frequency. The ground-roll model is established using the main eigenvectors, and the ground roll is detected and identified using the instantaneous polarization area attributes and average energy constraints of the ground-roll zone. Finally, the ground roll is subtracted. The threshold of the method is stable and easy to select, and offers good groundroll detection. The method is a robust polarization filtering method. Model calculations and actual data indicate that the method can effectively identify and attenuate ground roll while preserving the effective signals.
To improve the data quality of converted waves, and better identify and suppress the strong ground-roll interference in three-component(3C) seismic recordings on land, we present an adaptive polarization filtering method, which can effectively separate the groundroll interference by combining complex polarization and instantaneous polarization analysis. The ground roll noise is characterized by elliptical plane polarization, strong energy, low apparent velocity, and low frequency. After low-pass filtering of the 3C data input within a given time-window of the ground roll, the complex covariance matrix is decomposed using the sliding time window with overlapping data and length that depends on the dominant ground-roll frequency. The ground-roll model is established using the main eigenvectors, and the ground roll is detected and identified using the instantaneous polarization area attributes and average energy constraints of the ground-roll zone. Finally, the ground roll is subtracted. The threshold of the method is stable and easy to select, and offers good groundroll detection. The method is a robust polarization filtering method. Model calculations and actual data indicate that the method can effectively identify and attenuate ground roll while preserving the effective signals.
引文
Benhama,A.,Cliet,C.,and Dubesset,M.,1988,Study and application of spatial directional filterings in threecomponent recordings:Geophysical Prospecting,36,591–613.
Chen,Y.,Zhang,Z.J.,and Tian,X.B.,2005,Complex polarization analysis based on windowed Hilbert transform and its application:Chinese J.Geophys(in Chinese),48(4),889–895.
Christoffersson,A.,Husebye,E.S.,and Ingate,S.F.,1988,Wavefield decomposition using ML probabilities inmodelling single-site 3-component records,Geophys.J.,93 ,197–213.
De,Meersman.K.,and Kendall,R.,2005,A complex SVD–polarization filter for ground roll attenuation on multicomponent data:67thEAGE Conference&Exhibition,Extended Abstracts,B019.
Diallo,M.S.,Ross,W.S.,and Krohn,C.E.,2008,Constrained polarization filtering for surface-wave mitigation:78thAnnual International Meeting,SEG,Expanded Abstracts,1058–1061,PAPR195.
Flinn,E.A.,1965,Signal analysis using rectilinearity anddirection of particle motion:Proceedings of the IEEE,53 ,1874–1876.
Franco,R.,and Musacchio,G.,2001,Polarization filter with singular value decomposition:Geophysics,66,932–938.
Huang,Z.Y.,Gao,L.,Xu,Y.M.,et al.,1996,The analysis of polarization in three-component seismic data and its application:Geophysical Prospecting for Petroleum(in Chinese),35(2),9–16.
Jackson,G.M.,Mason,I.M.,and Greenhalgh,S.A.,1991,Principal component transforms of triaxial recordings bysingular value decomposition:Geophysics,56(4),528–533.
Jin,S.,and Ronen,S.,2005,Ground roll detection and attenuation by 3C polarization analysis:67thEAGE Conference&Exhibition,Extended Abstracts,B020.
Jurkevics,A.,1988,Polarization analysis of threecomponent array data:Bulletin of the Seismological Society of America,78(5),1725–1743.
Lu,J.,Wang,Y.,and Yang,C.Y.,Instantaneous polarization filtering focused on suppression of surface waves:Applied Geophysics,7(1),88–97.
Morozov,L.B.,and Smithson,S.B.,1996,Instantaneouspolarization attributes and directional filtering:Geophysics,61 (3),872–881.
René,R.M.,Fitter,J.L.,Forsyth,P.M.,et al.,1986,Multicomponent seismic studies using complex trace analysis:Geophysics,51(6),1235–1251.
Samson,J.C.,1977,Matrix and Stokes vector representation of detectors for polarized wave-forms:theory,with some applications to teleseismic waves:Geophysical Journal of the Royal Astronomical Society,51,583–603.
Shieh,C.,and Herrmann,R.B.,1990,Ground roll:Rejection using polarization filters:Geophysics,55,1216–1222.
Shimshoni,M.,and Smith,S.W.,1964,Seismic signal enhancement with three-component detectors:Geophysics,29,664–671.
Stewart,R.R.,1990,Ground-roll filtering using local instantaneous polarization:CREWES,Research Reports.
Tatham,R.H.,and McCormack,M.D.,1991,Multicomponent seismology in petroleum exploration:SEG Publication,Tulsa,Ok.
Tiapkina,O.,2008,Advanced detector of ground roll for single-station SVD-based polarization filtering:70th EAGE Conference&Exhibition,Extended Abstracts,P141.
Tiapkina,O.,2009,When single-station SVD-polarization filtering is effective and how it compares to multistation procedures:71stEAGE Conference&Exhibition,Extended Abstracts,P207.
Tiapkina,O.,Landr,M.,and Tyapkin,Y.,2010,Singlestation SVD-based polarization filtering-theoretical and synthetic data investigations:72ndEAGE Conference&Exhibition,Extended Abstracts,P127.
Tiapkina,O.,Landr,M.,Tyapkin,Y.,and Link,B.,2011,Single-station SVD-based polarization filtering of ground roll:Investigation of limitations and pitfalls:73rdEAGE Conference&Exhibition,Extended Abstracts,P094.
Vidale,T.,1986,Complex polarization analysis of particle motion:Bulletin of the Seismological Society of America,76,1393–1405.
White,J.E.,1964,Motion product seismograms:Geophysics,29,288–298.
Chen,Y.,Zhang,Z.J.,and Tian,X.B.,2005,Complex polarization analysis based on windowed Hilbert transform and its application:Chinese J.Geophys(in Chinese),48(4),889–895.
Christoffersson,A.,Husebye,E.S.,and Ingate,S.F.,1988,Wavefield decomposition using ML probabilities inmodelling single-site 3-component records,Geophys.J.,93 ,197–213.
De,Meersman.K.,and Kendall,R.,2005,A complex SVD–polarization filter for ground roll attenuation on multicomponent data:67thEAGE Conference&Exhibition,Extended Abstracts,B019.
Diallo,M.S.,Ross,W.S.,and Krohn,C.E.,2008,Constrained polarization filtering for surface-wave mitigation:78thAnnual International Meeting,SEG,Expanded Abstracts,1058–1061,PAPR195.
Flinn,E.A.,1965,Signal analysis using rectilinearity anddirection of particle motion:Proceedings of the IEEE,53 ,1874–1876.
Franco,R.,and Musacchio,G.,2001,Polarization filter with singular value decomposition:Geophysics,66,932–938.
Huang,Z.Y.,Gao,L.,Xu,Y.M.,et al.,1996,The analysis of polarization in three-component seismic data and its application:Geophysical Prospecting for Petroleum(in Chinese),35(2),9–16.
Jackson,G.M.,Mason,I.M.,and Greenhalgh,S.A.,1991,Principal component transforms of triaxial recordings bysingular value decomposition:Geophysics,56(4),528–533.
Jin,S.,and Ronen,S.,2005,Ground roll detection and attenuation by 3C polarization analysis:67thEAGE Conference&Exhibition,Extended Abstracts,B020.
Jurkevics,A.,1988,Polarization analysis of threecomponent array data:Bulletin of the Seismological Society of America,78(5),1725–1743.
Lu,J.,Wang,Y.,and Yang,C.Y.,Instantaneous polarization filtering focused on suppression of surface waves:Applied Geophysics,7(1),88–97.
Morozov,L.B.,and Smithson,S.B.,1996,Instantaneouspolarization attributes and directional filtering:Geophysics,61 (3),872–881.
René,R.M.,Fitter,J.L.,Forsyth,P.M.,et al.,1986,Multicomponent seismic studies using complex trace analysis:Geophysics,51(6),1235–1251.
Samson,J.C.,1977,Matrix and Stokes vector representation of detectors for polarized wave-forms:theory,with some applications to teleseismic waves:Geophysical Journal of the Royal Astronomical Society,51,583–603.
Shieh,C.,and Herrmann,R.B.,1990,Ground roll:Rejection using polarization filters:Geophysics,55,1216–1222.
Shimshoni,M.,and Smith,S.W.,1964,Seismic signal enhancement with three-component detectors:Geophysics,29,664–671.
Stewart,R.R.,1990,Ground-roll filtering using local instantaneous polarization:CREWES,Research Reports.
Tatham,R.H.,and McCormack,M.D.,1991,Multicomponent seismology in petroleum exploration:SEG Publication,Tulsa,Ok.
Tiapkina,O.,2008,Advanced detector of ground roll for single-station SVD-based polarization filtering:70th EAGE Conference&Exhibition,Extended Abstracts,P141.
Tiapkina,O.,2009,When single-station SVD-polarization filtering is effective and how it compares to multistation procedures:71stEAGE Conference&Exhibition,Extended Abstracts,P207.
Tiapkina,O.,Landr,M.,and Tyapkin,Y.,2010,Singlestation SVD-based polarization filtering-theoretical and synthetic data investigations:72ndEAGE Conference&Exhibition,Extended Abstracts,P127.
Tiapkina,O.,Landr,M.,Tyapkin,Y.,and Link,B.,2011,Single-station SVD-based polarization filtering of ground roll:Investigation of limitations and pitfalls:73rdEAGE Conference&Exhibition,Extended Abstracts,P094.
Vidale,T.,1986,Complex polarization analysis of particle motion:Bulletin of the Seismological Society of America,76,1393–1405.
White,J.E.,1964,Motion product seismograms:Geophysics,29,288–298.
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