径向道变换技术在去噪处理中的改进与发展
摘要
自Henley D于1999年成功地将径向道变换应用于消除相干噪声以来,该项技术已得到广泛、深入发展。发展方向主要为:①选择最佳径向道原点,使之更适于拟合地震资料中的相干噪声;②更新原有的插值技术,使径向道变换过程中对相干噪声的拟合更为准确,在去噪过程中对有效波的影响减小到最小;③如何更好地将有效的相干噪声消除技术与径向道变换技术相结合;④避开径向道变换中的插值过程,采用局部径向道预测技术来消除相干噪声;⑤变径向道原点及分频处理等等。分析了上述技术的发展背景、各自优缺点及适应性,提出了新的径向道扫描方法。实际资料表明了这种方法更利于相干噪声的消除。
引文
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[9]夏洪瑞,周开明,等.均值加权消除相干干扰[J].石油物探,2000,39(2):77-82.
[2]OTTOLI NI R.Downward continuation of common mid-point gathers by transformationinto snell trace coordinates[R].Stan-ford Exploration Project Report,SEP-26,1979:83-94.
[3]HENLEY D C.Coherent noise attenuationin the radial trace do-main[J].Geophysics,2003,68(4):1408-1416.
[4]HENLEY D.The radial trace transform:an effective domain for coherent noise attenuation and wavefield separation Expanded Abstrace of69Annual Internat[C].SEG Mtg,1999:1204-1207.
[5]余波,黄中玉,谈大龙,等.径向道滤波法去线性干扰[J].石油物探.2005,44(2):109-112.
[6]BROWN M,CLAERBOUT J F.A pseudo-unitary i mplementa-tion of the radial transform[C].Expanded Abstrace of70Annual Internat SEG Mtg,2000:2115-2118.
[7]HENLEY D.Effective noise attenuation and deconvolutionin the radial trace domain[C].SEG200474thannual Mtg,Expanded Abstract.
[8]WEI HONG ZHU,PANOS G.Linear noise attenuation using lo-cal radial trace median filtering[J].The Leading Edge,2004,23(8):728-730.
[9]夏洪瑞,周开明,等.均值加权消除相干干扰[J].石油物探,2000,39(2):77-82.
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