分离多次波的独立分量分析法
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摘要
将独立分量分析(ICA)法与逆散射级数多次波预测法结合起来压制多次波.用逆散射级数法预测与自由表面相关的各阶多次波,并与原始地震记录组成多个观测量,通过独立分量分析方法,将与自由表面相关的多次波从原始地震记录中分离出来.理论合成数据试验表明,即使预测多次波与原始记录中的多次波能量不能很好匹配,ICA法分离多次波也能取得较好的效果,但是,原始资料的低信噪比使得ICA法分离多次波具有不确定性.
The independent component analysis(ICA) for separating multiples is combined with the inverse scattering series(ISS) for predicting multiples to suppress surface-related multiples.Multiples predicted by ISS and raw seismic records make up several observation components,and ICA is applied to separating multiples from the raw seismic records.Tests on synthetic data by convolution and finite-difference modeling show the advantages of ICA in multiples separation even mismatching in amplitude between the predicted multiples and raw seismic data.But there are uncertainties in multiples separation by ICA in case of low signal-to-noise ratio of raw seismic data.
The independent component analysis(ICA) for separating multiples is combined with the inverse scattering series(ISS) for predicting multiples to suppress surface-related multiples.Multiples predicted by ISS and raw seismic records make up several observation components,and ICA is applied to separating multiples from the raw seismic records.Tests on synthetic data by convolution and finite-difference modeling show the advantages of ICA in multiples separation even mismatching in amplitude between the predicted multiples and raw seismic data.But there are uncertainties in multiples separation by ICA in case of low signal-to-noise ratio of raw seismic data.
引文
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[12]LU W K,LIU L.Adaptive multiple subtraction based onconstrained independent component analysis[J].Geophysics,2009,74(1):V1.
[13]Kaplan S T,Innanen K A.Adaptive separation of free-surfacemultiples through independent component analysis[J].Geophysics,2008,73(3):V29.
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[15]Hyvrinen A,Karhunen J,Oja E.Independent componentanalysis[M].Finland:John Wiley&Sons Inc,2001.
[16]Carvalho P M,Weglein A B.Nonlinear inverse scattering formultiple suppression:part I[C]∥SEG 62nd AnnualInternational Meeting Expanded Abstracts.[S.l.]:SEG,1992:1093-1095.
[17]李翔,胡天跃.逆散射级数法去除自由表面多次波[J].地球物理学报,2009,52(6):1633.LI Xiang,HU Tianyue.Surface-related multiple removal withinverse scattering series method[J].Chinese Journal ofGeophysics,2009,52(6):1633.
[18]WANG Y H.Multiple subtraction using an expanded multichannelmatching filter[J].Geophysics,2003,68(1):346
[2]Wiggins J W.Attenuation of complex water-bottom multiplesby wave equation based prediction and subtraction[J].Geophysics,1988,53(12):1527.
[3]Verschuur D J,Berkhout A J.Estimation of multiple scatteringby iterative inversion.Part II:practical aspects and examples[J].Geophysics,1997,62(5):1596.
[4]Weglein A B,Gasparotto F A,Carvalho P M,et al.An inverse-scattering series method for attenuating multiples in seismicreflection data[J].Geophysics,1997,62(6):1975.
[5]Weglein A B,Araujo F V,Carvalho P M,et al.Inversescattering series and seismic exploration[J].InverseProblems,2003,19(6):R27.
[6]Verschuur D J,Berkhout A J,Wapenaar C P.Adaptivesurface-related multiple elimination[J].Geophysics,1992,57(9):1166.
[7]Common P.Independent component analysis,a new concept?[J].Signal Processing,1994,36:287.
[8]Walden A T.Non-Gaussian reflectivity,entropy,anddeconvolution[J].Geophysics,1985,50(12):2862.
[9]刘喜武,刘洪,郑天愉.用独立分量分析方法实现地震转换波与多次波分离[J].防灾减灾工程学报,2003,23(1):11.LIU Xiwu,LIU Hong,ZHENG Tianyu.Separation ofconverted-wave from seismic multiples by independentcomponent analysis[J].Journal of Disaster Prevention andMitigation Engineering,2003,23(1):11.
[10]陆文凯,骆毅,赵波,等.基于独立分量分析的多次波自适应相减技术[J].地球物理学报,2004,47(5):886.LU Wenkai,LUO Yi,ZHAO Bo,et al.Adaptive multiple wavesubtraction using independent component analysis[J].ChineseJournal of Geophysics,2004,47(5):886.
[11]LU Wenkai.Adaptive multiple subtraction using independentcomponent analysis[J].Geophysics,2006,71(5):S179.
[12]LU W K,LIU L.Adaptive multiple subtraction based onconstrained independent component analysis[J].Geophysics,2009,74(1):V1.
[13]Kaplan S T,Innanen K A.Adaptive separation of free-surfacemultiples through independent component analysis[J].Geophysics,2008,73(3):V29.
[14]Hyvrinen A,Oja E.Independent component analysis:Algorithms and applications[J].Neural Networks,2000,13(4-5):411.
[15]Hyvrinen A,Karhunen J,Oja E.Independent componentanalysis[M].Finland:John Wiley&Sons Inc,2001.
[16]Carvalho P M,Weglein A B.Nonlinear inverse scattering formultiple suppression:part I[C]∥SEG 62nd AnnualInternational Meeting Expanded Abstracts.[S.l.]:SEG,1992:1093-1095.
[17]李翔,胡天跃.逆散射级数法去除自由表面多次波[J].地球物理学报,2009,52(6):1633.LI Xiang,HU Tianyue.Surface-related multiple removal withinverse scattering series method[J].Chinese Journal ofGeophysics,2009,52(6):1633.
[18]WANG Y H.Multiple subtraction using an expanded multichannelmatching filter[J].Geophysics,2003,68(1):346
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