循环中值滤波在消除可控震源地震资料噪声中的应用
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摘要
中值滤波是地震资料去噪处理中的常用工具,由于其对去噪资料有较严格的要求,使去噪效果不甚理想。可控震源地震资料正好满足中值滤波的应用前提,但又存在道数少,边界效应所占比例大的缺陷。根据可控震源资料的特点,提出了将去噪记录横向首尾相连,然后进行中值滤波,以克服边界效应的循环中值滤波方法。理论模型测试和实际可控震源资料处理证明了这种方法的可行性。
Although mid-value filtering is often used to eliminate seismic information noise,it does not have good effect on noise elimination because of its high requirements for noise-eliminated information.Vibroseis information just meets the premise of applying median filtering.However,it has fewer traces and larger proportion of boundary effect.According to the characteristics of vibroseis information,the authors propose circulating median filtering approach that noise-eliminated records are both connected horizontally before median filtering to overcome boundary effect.Theoretical model tests and practical vibroseis information processing have proved the feasibility of this approach.
Although mid-value filtering is often used to eliminate seismic information noise,it does not have good effect on noise elimination because of its high requirements for noise-eliminated information.Vibroseis information just meets the premise of applying median filtering.However,it has fewer traces and larger proportion of boundary effect.According to the characteristics of vibroseis information,the authors propose circulating median filtering approach that noise-eliminated records are both connected horizontally before median filtering to overcome boundary effect.Theoretical model tests and practical vibroseis information processing have proved the feasibility of this approach.
引文
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[5]夏洪瑞,陈德刚,周开明,等.中值约束下的矢量分解去噪[J].石油物探.2001,40(3).
[6]夏洪瑞,董江伟,等.常规二次多项式拟合地震数据[J].石油物探.2006,45(5).
[2]宋焕生,梁德群,刘春阳.一种新的自适应多级中值滤波器[J].信号处理,1996,12(4).
[3]Galagher NC,Wise GL.ATheoretical of t he Propertiesof Median Filters[J].IEEE Trans on Acoust,Speech andSignal Processing,1981,ASSP29(6).
[4]Thomas A Nodes.Median Filters:Some Modification andTheir Properties[J].IEEE Trans on Acoust,Speech andSignal Processing,1982,ASSP30(5).
[5]夏洪瑞,陈德刚,周开明,等.中值约束下的矢量分解去噪[J].石油物探.2001,40(3).
[6]夏洪瑞,董江伟,等.常规二次多项式拟合地震数据[J].石油物探.2006,45(5).
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