时频误差分析法在地震信号分析中的应用
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摘要
时频误差分析法与常规的误差分析法相比,既能反映地震信号的振幅误差,也能区分其相位误差。通过连续小波变换的时频误差分析法,分析了平面地震波在复杂构造中含随机介质及其对应构造的各向同性介质模型中的共炮点合成地震记录的时频振幅误差和时频相位误差。研究结果表明,随机介质的振幅比各向同性介质的振幅衰减大,且随机介质的频率也较各向同性介质的频率为宽。
Compared to conventional error analytic methods,time-frequency representation can reflect the amplitude misfit and phase misfit of seismic signal.The continuous wavelet transformation was used to analyse the amplitude and phase misfits of the seismis signal of the common point's synthetic seismogram of the surface wave with the random medium model and the correspondant isotropic model.The results show more attenuation of the random medium amplitute than that of isotropic medium and wider frequency of the random than isotropic medium.
Compared to conventional error analytic methods,time-frequency representation can reflect the amplitude misfit and phase misfit of seismic signal.The continuous wavelet transformation was used to analyse the amplitude and phase misfits of the seismis signal of the common point's synthetic seismogram of the surface wave with the random medium model and the correspondant isotropic model.The results show more attenuation of the random medium amplitute than that of isotropic medium and wider frequency of the random than isotropic medium.
引文
[1]Miriam Kristekov,Jozef Kristek,Peter Moczo,et al.MisfitCriteria for Quantitative Comparison of Seismograms[M]//In:press in the Bulletin of the Seismological Society of Ameri-ca,2006.
[2]奚先,姚姚.二维横各向同性弹性随机介质中的波场特征[J].地球物理学进展,2004,19(4):924-932.
[3]奚先,姚姚.弹性随机介质模型的特征频率[J].地球物理学进展,2005,20(3):681-687.
[4]奚先,姚姚.二维弹性随机介质中的波场特征[J].地球物理学进展,2005,20(1):147-154.
[5]奚先,姚姚,顾汉明.随机溶洞介质模型及其波场模拟[J].地球物理学进展,2005,20(2):365-369.
[6]Korn M.Seismic wave in random media[J].Journalof Applied Geophysics,1993,29(4):247-269.
[7]Bertrand Iooss.Seismic reflection travesties in two-dimensional statistically anisotropic random media[J].Geophysics,1998,135(3):999-1010.
[8]奚先,姚姚.二维粘弹性随机介质中的波场特征分析[J].地球物理学进展,2004,19(3):608-615.
[9]钟伟,杨宝俊,张智.复杂介质地震波场研究进展[J].世界地质,2005,24(4):402-412.
[10]Guido Kneib,Serge A Shapiro.Viscoacoustic wavepropagation in 2-D random media and separation ofabsorption and scattering attenuation[J].Geophys-ics,1995,60(4):459-467.
[11]奚先,姚姚.二维随机介质及波动方程正演模拟[J].石油地球物理勘探,2001,36(5):564-552.
[12]Ikelle L,Yung S,Daube F.2-D random media with ellipsoi-dal autocorrelation function[J].Geophysics,1993,58(9):1359-1372.
[13]奚先,姚姚,顾汉民.随机溶洞介质模型的构造[J].华中科技大学学报(自然科学版),2005,33(9):105-108.
[14]常旭.地震正反演与成像[M].北京:华文出版社,2001.
[2]奚先,姚姚.二维横各向同性弹性随机介质中的波场特征[J].地球物理学进展,2004,19(4):924-932.
[3]奚先,姚姚.弹性随机介质模型的特征频率[J].地球物理学进展,2005,20(3):681-687.
[4]奚先,姚姚.二维弹性随机介质中的波场特征[J].地球物理学进展,2005,20(1):147-154.
[5]奚先,姚姚,顾汉明.随机溶洞介质模型及其波场模拟[J].地球物理学进展,2005,20(2):365-369.
[6]Korn M.Seismic wave in random media[J].Journalof Applied Geophysics,1993,29(4):247-269.
[7]Bertrand Iooss.Seismic reflection travesties in two-dimensional statistically anisotropic random media[J].Geophysics,1998,135(3):999-1010.
[8]奚先,姚姚.二维粘弹性随机介质中的波场特征分析[J].地球物理学进展,2004,19(3):608-615.
[9]钟伟,杨宝俊,张智.复杂介质地震波场研究进展[J].世界地质,2005,24(4):402-412.
[10]Guido Kneib,Serge A Shapiro.Viscoacoustic wavepropagation in 2-D random media and separation ofabsorption and scattering attenuation[J].Geophys-ics,1995,60(4):459-467.
[11]奚先,姚姚.二维随机介质及波动方程正演模拟[J].石油地球物理勘探,2001,36(5):564-552.
[12]Ikelle L,Yung S,Daube F.2-D random media with ellipsoi-dal autocorrelation function[J].Geophysics,1993,58(9):1359-1372.
[13]奚先,姚姚,顾汉民.随机溶洞介质模型的构造[J].华中科技大学学报(自然科学版),2005,33(9):105-108.
[14]常旭.地震正反演与成像[M].北京:华文出版社,2001.
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