Radon变换多次波压制方法及应用研究
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摘要
多次波在地震资料中是普遍存在的。Radon变换是现行商业地震资料多次波压制处理软件应用最多的模块之一。这里在详细阐述Radon变换基本原理和离散采样计算的基础上,给出了理论模拟地震数据的多次波压制算法和计算结果。进而将Radon变换多次波压制方法应用于松辽盆地地震资料处理中,在对实际的CRP道集合理设计滤波切除函数后,应用本文的Radon变换算法,得到多次波压制的地震剖面。对比多次波压制前、后的叠前时间偏移地震剖面,压制多次波后地震剖面的信噪比很高,地质构造特征清晰,可应用于后续的地质构造解释,地震属性提取和油气储层预测。该方法的计算效率较高,算法易于实现。理论和实际地震数据的多次波压制结果表明,该算法具有高精度和实用性强的特点。
Multiple reflection wave appeared commonly in seismic data.Multiple suppression using Radon transform is the popular processing module in conventional seismic data processing software.Based on the principle of linear Radon transform and the discrete sampling algorithm,the multiple suppression section of theoretical model data is proposed in this paper,and also,the multiple suppression algorithm is used in practical field seismic data in Songliao Basin.On the basis of the muting function for every common reflection point(CRP) gather,the multiple is muted from the corresponding CRP gather,and the final pre-stack time migration seismic section is gotten.By comparison of the initial to the multiple suppression seismic section,we draw conclusion that the S/N ratio is improved in the multiple suppression pre-stack time migration section,and the geological structure is very clear.So the multiple suppression section using Radon algorithm can be used for geological structure interpretation,such seismic attributes extracting and also reservoir prediction,etc.The calculated result from theoretical model and field seismic data demonstrate that the proposed technique is high accuracy and practical.
Multiple reflection wave appeared commonly in seismic data.Multiple suppression using Radon transform is the popular processing module in conventional seismic data processing software.Based on the principle of linear Radon transform and the discrete sampling algorithm,the multiple suppression section of theoretical model data is proposed in this paper,and also,the multiple suppression algorithm is used in practical field seismic data in Songliao Basin.On the basis of the muting function for every common reflection point(CRP) gather,the multiple is muted from the corresponding CRP gather,and the final pre-stack time migration seismic section is gotten.By comparison of the initial to the multiple suppression seismic section,we draw conclusion that the S/N ratio is improved in the multiple suppression pre-stack time migration section,and the geological structure is very clear.So the multiple suppression section using Radon algorithm can be used for geological structure interpretation,such seismic attributes extracting and also reservoir prediction,etc.The calculated result from theoretical model and field seismic data demonstrate that the proposed technique is high accuracy and practical.
引文
[1]贾承造,赵文智,邹才能,等.岩性地层油气藏勘探研究的两项核心技术[J].石油勘探与开发,2004,31(3):3.
[2]VERSCHUUR D J,BERKHOUT A J,WAPENARR PA.Adaptive surface-related multiple elimination[J].Ge-ophysics,1992,57:1166.
[3]SCHNEIDER W A,PINCE E R,GILES B F.Anewdata-processing techque for multiple attenuation exploitingdifferential normal moveout[J].Geophysics,1965,30:348.
[4]WAND Y.Multiple attenuation:coping with the spatialtruncation effect in the Radon transform domain[J].Ge-ophysical Prospecting,2003,51:75.
[5]TANER M T.Long-period sea-floor multiples and theirsuppression[J].Geophysical Prospecting,1980,28:30.
[6]张红梅,刘洪.若干稀硫离散τ-P变换的叠后地震道内插[J].石油地球物理勘探,2006,41(3):281.
[7]王维红,首皓,刘洪,等.线性同相轴波场分离的高分辨率τ-P变换法[J].地球物理学进展,2006,21(1):74.
[8]吴律.变换方法及其杂在地震资料处理中的应用[J].石油物探,1996,1(1):37.
[9]SCHULTZ P S,CLAERBOUT J F.Velocity estimationand downward continuation by wavefront synthesis[J].Geophysics,1978,43(3):691.
[10]KOSTOV C.Toeplitz structure in slant-stack inversion:60th Annual Internat.Mtg.,Soc.Expl[J].Geophys.,Expanded abstracts,1990:1618.
[11]HAMPSON D.Inverse velocity stacking for multipleelimination[J].Journal of the Canadian Society of Ex-ploration geophysicists,1986,22:44.
[12]KABIR M M N,VERSCHUUR D J.Restoration of miss-ing offsets by parabolic Radon Transform[J].Geophys.Prosp,1995,43:347.
[13]王维红,刘洪.抛物Radon变换法近偏移距波场外推[J].地球物理学进展,2005,20(2):289.
[2]VERSCHUUR D J,BERKHOUT A J,WAPENARR PA.Adaptive surface-related multiple elimination[J].Ge-ophysics,1992,57:1166.
[3]SCHNEIDER W A,PINCE E R,GILES B F.Anewdata-processing techque for multiple attenuation exploitingdifferential normal moveout[J].Geophysics,1965,30:348.
[4]WAND Y.Multiple attenuation:coping with the spatialtruncation effect in the Radon transform domain[J].Ge-ophysical Prospecting,2003,51:75.
[5]TANER M T.Long-period sea-floor multiples and theirsuppression[J].Geophysical Prospecting,1980,28:30.
[6]张红梅,刘洪.若干稀硫离散τ-P变换的叠后地震道内插[J].石油地球物理勘探,2006,41(3):281.
[7]王维红,首皓,刘洪,等.线性同相轴波场分离的高分辨率τ-P变换法[J].地球物理学进展,2006,21(1):74.
[8]吴律.变换方法及其杂在地震资料处理中的应用[J].石油物探,1996,1(1):37.
[9]SCHULTZ P S,CLAERBOUT J F.Velocity estimationand downward continuation by wavefront synthesis[J].Geophysics,1978,43(3):691.
[10]KOSTOV C.Toeplitz structure in slant-stack inversion:60th Annual Internat.Mtg.,Soc.Expl[J].Geophys.,Expanded abstracts,1990:1618.
[11]HAMPSON D.Inverse velocity stacking for multipleelimination[J].Journal of the Canadian Society of Ex-ploration geophysicists,1986,22:44.
[12]KABIR M M N,VERSCHUUR D J.Restoration of miss-ing offsets by parabolic Radon Transform[J].Geophys.Prosp,1995,43:347.
[13]王维红,刘洪.抛物Radon变换法近偏移距波场外推[J].地球物理学进展,2005,20(2):289.
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