联合垂直地震剖面资料提高地面地震资料分辨率的应用研究
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摘要
介绍利用三分量垂直地震剖面(VSP)资料中的纵波初至求取地层品质因子Q值的原理及方法、稳定化的反Q滤波方法,以及实现联合VSP地震资料进行反Q滤波提高分辨率处理的技术流程。利用三分量VSP资料估算的弹性参数可以与地层的Q值进行对比分析,证实估算的地层Q值的准确性。实际VSP资料和过井的地面地震资料的应用研究结果表明,所提方法与技术流程是可行的,能够在不影响地震资料信噪比的情况下提高地面地震资料的分辨率。与VSP走廊叠加结果对比结果表明,提高分辨率后的地震资料与VSP结果具有很好的一致性。
The theory and method of quality factor(Q) estimation using P-wave first break in three-component vertical-seismic-profile(VSP) seismic data,stabilized inverse Q-filtering method were given and a processing flow for improving surface seismic data resolution combined with VSP seismic data was proposed.The elastic parameters can be derived from three-component VSP seismic dataset,such as velocity ratio of P-and S-wave,Poisson's ratio and volume modulus.These parameters can be used to correct the Q model estimated from VSP seismic data.The results of real field VSP seismic data and seismic data across the well show that the methods and technique process are feasible.It can enhance the seismic resolution without effects on the seismic signal-to-noise ratio.Compared with the stacked VSP seismic trace to the seismic sections before and after inverse Q filtering,the seismic data with high resolution agrees well with the VSP results.
The theory and method of quality factor(Q) estimation using P-wave first break in three-component vertical-seismic-profile(VSP) seismic data,stabilized inverse Q-filtering method were given and a processing flow for improving surface seismic data resolution combined with VSP seismic data was proposed.The elastic parameters can be derived from three-component VSP seismic dataset,such as velocity ratio of P-and S-wave,Poisson's ratio and volume modulus.These parameters can be used to correct the Q model estimated from VSP seismic data.The results of real field VSP seismic data and seismic data across the well show that the methods and technique process are feasible.It can enhance the seismic resolution without effects on the seismic signal-to-noise ratio.Compared with the stacked VSP seismic trace to the seismic sections before and after inverse Q filtering,the seismic data with high resolution agrees well with the VSP results.
引文
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[10]WANG Y H.Quantifying the effectiveness of stabilizedinverse Q filtering[J].Geophysics,2003,68(1):337-345.
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[12]CHEN S Q,WANG Y H.Inverse Q filtering in 3D P-Pand P-SV seismic data:a case study from Sichuan Ba-sin,China[C/OL].70th EAGE Conference&Exhibi-tion,In session"Attenuation/Velocity Model Build-ing".2008.P171[2008-06-11].http://www.earthdoc.org/detail.php?pubid=10116.
[13]TONN R.The determination of the seismic quality factorQ from VSP data:a comparison of different computation-al methods[J].Geophys Prosp,1991,39(3):1-28.
[14]CLAERBOUT J F.Fundamentals of geophysical dataprocessing[M].New York:McGraw-Hill Book Co,1976.
[15]KOLSKY H.The propagation of stress pulses in viscoe-lastic solids[J].Phil Mag,1956,8(1):673-710.
[16]KJARTANSSON E.Constanat Q wave propagation andattenuation[J].J Geophys Res,1979,84(2):4737-4748.
[17]WANG Y,GUO J.Modified Kolsky model for seismicattenuation and dispersion[J].Journal of Geophysicsand Engineering,2004,1(2):187-196.
[2]GASSMANN F.ber die Elastizitt poroser Medien[J].Veirteljahrsschrift der Naturforschenden Gesellschaft inZürich,1951,96(2):1-23.
[3]BATZLE M L,HAN D,HOFMANN R.Fluid mobilityand frequency-dependent seismic velocity-direct measure-ments[J].Geophysics,2006,71(6):N1-N9.
[4]李增学,韩美莲,魏久传,等.鄂尔多斯盆地上古生界高分辨率层序划分与煤聚积规律分析[J].中国石油大学学报:自然科学版,2008,32(1):5-11.LI Zeng-xue,HAN Mei-lian,WEI Jiu-chuan,et al.A-nalysis of high-resolution sequence stratigraphy and coalaccumulation law of upper Paleozoic earthen in Ordos Ba-sin[J].Journal of China University of Petroleum(Edi-tion of Natural Science),2008,32(1):5-11.
[5]HALE D.An inverse Q-filter[R/OL].SEP Report1981,26:231-243[1981-10-26].http://sepwww.stan-ford.edu/theses/sep26/26_22_abs.html.
[6]BICKEL S H,NATARAJAN R R.Plane-wave Q decon-volution[J].Geophysics,1985,50(9):1426-1439.
[7]HARGREAVES N D,CALVERT A J.Inverse Q filteringby Fourier transform[J].Geophysics,1991,56(4):519-527.
[8]BANO M.Q-phase compensation of seismic records inthe frequency domain[J].Bull Seis Soc Am,1996,86(4):1179-1186.
[9]WANG Y H.A stable and efficient approach of inverse Qfiltering[J].Geophysics,2002,67(2):657-663.
[10]WANG Y H.Quantifying the effectiveness of stabilizedinverse Q filtering[J].Geophysics,2003,68(1):337-345.
[11]WANG Y H.Inverse Q filter for seismic resolution en-hancement[J].Geophysics 2006,71(3):V51-60.
[12]CHEN S Q,WANG Y H.Inverse Q filtering in 3D P-Pand P-SV seismic data:a case study from Sichuan Ba-sin,China[C/OL].70th EAGE Conference&Exhibi-tion,In session"Attenuation/Velocity Model Build-ing".2008.P171[2008-06-11].http://www.earthdoc.org/detail.php?pubid=10116.
[13]TONN R.The determination of the seismic quality factorQ from VSP data:a comparison of different computation-al methods[J].Geophys Prosp,1991,39(3):1-28.
[14]CLAERBOUT J F.Fundamentals of geophysical dataprocessing[M].New York:McGraw-Hill Book Co,1976.
[15]KOLSKY H.The propagation of stress pulses in viscoe-lastic solids[J].Phil Mag,1956,8(1):673-710.
[16]KJARTANSSON E.Constanat Q wave propagation andattenuation[J].J Geophys Res,1979,84(2):4737-4748.
[17]WANG Y,GUO J.Modified Kolsky model for seismicattenuation and dispersion[J].Journal of Geophysicsand Engineering,2004,1(2):187-196.
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