三维锥形滤波方法研究及应用
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摘要
本文详细阐述了三维锥形滤波与二维视速度滤波方法存在差异的原因,分析了影响三维锥形滤波效果的因素,据此设计的锥形滤波器滤除面波,取得了很好的效果。三维锥形滤波的最大优势在于充分利用了地震信号的空间分布特征,在选择合适的速度参数条件下,可以在去除面波干扰的同时,最大程度地保留地震波有效反射信号。
Making full use of the apparent velocity difference between seismic reflection signal and linear interference in three dimensions,the three dimensional cone filtering could obtain an effective suppression of surface waves.This filtering approach first transforms seismic data from time-space domain to frequency-wavenumber domain with three dimensional Fourier transform,and then designs a cone filter to suppress surface waves with low apparent velocity in order to preserve signals.Compared to the conventional two dimensional apparent velocities filtering,the three dimensional cone filtering uses the space distribution of seismic signal and chooses reasonable velocity values.So it could fully remove surface waves and preserve seismic signals.Moreover,for hyperbolic surface waves of far offsets in three dimension geometry,this cone filtering can also obtain good result for remove of surface waves,but the conventional two dimensional apparent velocity filtering cannot.
Making full use of the apparent velocity difference between seismic reflection signal and linear interference in three dimensions,the three dimensional cone filtering could obtain an effective suppression of surface waves.This filtering approach first transforms seismic data from time-space domain to frequency-wavenumber domain with three dimensional Fourier transform,and then designs a cone filter to suppress surface waves with low apparent velocity in order to preserve signals.Compared to the conventional two dimensional apparent velocities filtering,the three dimensional cone filtering uses the space distribution of seismic signal and chooses reasonable velocity values.So it could fully remove surface waves and preserve seismic signals.Moreover,for hyperbolic surface waves of far offsets in three dimension geometry,this cone filtering can also obtain good result for remove of surface waves,but the conventional two dimensional apparent velocity filtering cannot.
引文
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[4]何旭莉,刘素芹,仝兆岐.三维频率—波数域视速度去噪方法.中国石油大学学报(自然科学版),2010,34(4):62～66He Xuli,Liu Suqin,Tong Zhaoqi.3-D denoisingmethod through visual speed in frequency-wavenumberdomain.Journal of China University of Petroleum,2010,34(4):62～66
[5]吴长江.三维锥形滤波器压制面波的应用效果分析.工程地球物理学报,2010,7(1):15～18Wu Changjiang.Application of 3-D cone-shaped filterto surface wave suppression and its analysis.ChineseJournal of Engineering Geophysics,2010,7(1):15～18
[6]渥.伊尔马滋著;刘怀山,王克斌,童思友等译.地震资料分析.北京:石油工业出版社,2006,120
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[8]Frank Linville A,Robert A Meek.A procedure foroptimally removing localized coherent noise.Geophy-sics,1995,60(1):191～203
[9]陆基孟.地震勘探原理(上).山东东营:石油大学出版社,1990
[2]Gijs J O Vermeer著;李培明,何永清等译.三维地震勘探设计.北京:石油工业出版社,2008
[3]吴华,李延峰,任朝发.“十字交叉法”面波去噪技术及应用.CPS/SEG Beijing 2009International Geophysi-cal Conference&Exposition,2009
[4]何旭莉,刘素芹,仝兆岐.三维频率—波数域视速度去噪方法.中国石油大学学报(自然科学版),2010,34(4):62～66He Xuli,Liu Suqin,Tong Zhaoqi.3-D denoisingmethod through visual speed in frequency-wavenumberdomain.Journal of China University of Petroleum,2010,34(4):62～66
[5]吴长江.三维锥形滤波器压制面波的应用效果分析.工程地球物理学报,2010,7(1):15～18Wu Changjiang.Application of 3-D cone-shaped filterto surface wave suppression and its analysis.ChineseJournal of Engineering Geophysics,2010,7(1):15～18
[6]渥.伊尔马滋著;刘怀山,王克斌,童思友等译.地震资料分析.北京:石油工业出版社,2006,120
[7]Dave Hale,Jon F Claerbout.Butterworth dip filters.Geophysics,1983,48(8):1011～1038
[8]Frank Linville A,Robert A Meek.A procedure foroptimally removing localized coherent noise.Geophy-sics,1995,60(1):191～203
[9]陆基孟.地震勘探原理(上).山东东营:石油大学出版社,1990
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