线性化空间变换叠前与叠后地震记录去噪方法
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摘要
提出一种适应复杂构造地区地震资料叠前与叠后去噪新方法.该方法基于叠加剖面信息,利用正交多项式逼近技术,计算出描述地震同相轴走势的相关系数.并利用这些系数对叠加剖面或炮记录在横向作线性化变换,对变换后地震数据进行奇异值检测压制和F-X域有效信号预测.通过理论数据检验表明:本方法能较好适应复杂构造,具有较强去随机干扰和野值能力,保真性较好等特点.该方法已经在实际资料处理生产中得到了应用,并取得了较好的应用效果.
This paper represents a new denoise method,which can be used for the prestack and poststack seismic data in the complicated structure area.Based on the information of stack sections,this method computes the coefficients about the tendency of seismic events by using orthogonally polynomial fitting.These coefficients are applied to data for linear transformation in transverse direction.After that,data is done by singular value filter and for prediction of effective signal in domain.The trial of theoretical data shows that this method can work well in the complicated structure area,having an ability to get rid of random noises and wild values and the ability to keep the fidelity of data.This method has been applied to real data in processing production and achieved a better result.
This paper represents a new denoise method,which can be used for the prestack and poststack seismic data in the complicated structure area.Based on the information of stack sections,this method computes the coefficients about the tendency of seismic events by using orthogonally polynomial fitting.These coefficients are applied to data for linear transformation in transverse direction.After that,data is done by singular value filter and for prediction of effective signal in domain.The trial of theoretical data shows that this method can work well in the complicated structure area,having an ability to get rid of random noises and wild values and the ability to keep the fidelity of data.This method has been applied to real data in processing production and achieved a better result.
引文
[1]俞寿朋,蔡希玲,苏永昌.用地震信号多项式拟合提高叠加剖面信噪比[J].石油地球物理勘探,1988,23(2):131~139.
[2]Necti Gulunay.Fxdecon and complex Wiener prediction filter[J].Presented at the 56th SEG Mtg,1986.
[3]White R E,Summers T.F-x random noise attenuation[J].BP report EXT 55914,1989.
[4]Hornbostel S.Spatial prediction filtering in the t-x and f-x do-mains[J].Geophysics,1991,56.
[5]国九英.叠前ω-x域算子外推法去噪[J].石油地球物理勘探,1995,30(4):487~494.
[6]陈湛文,刘勇.基于空间变换的F-X地震去噪新方法[J].大庆石油地质与开发,2002,21(3):74~75.
[2]Necti Gulunay.Fxdecon and complex Wiener prediction filter[J].Presented at the 56th SEG Mtg,1986.
[3]White R E,Summers T.F-x random noise attenuation[J].BP report EXT 55914,1989.
[4]Hornbostel S.Spatial prediction filtering in the t-x and f-x do-mains[J].Geophysics,1991,56.
[5]国九英.叠前ω-x域算子外推法去噪[J].石油地球物理勘探,1995,30(4):487~494.
[6]陈湛文,刘勇.基于空间变换的F-X地震去噪新方法[J].大庆石油地质与开发,2002,21(3):74~75.
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