相关原理在压制地震单频干扰中的应用研究
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摘要
在野外地震采集数据的区域,由于有工业电线,导致地震记录存在着大量50Hz的单频噪声。互相关函数是确定单频干扰噪声频率重要手段。以相关原理为基础,提出分步搜索的快速算法得到高精度干扰频率。合成数据得出频率估算精度达到0.001Hz能达到较好压制效果。理论试算和实际地震资料处理结果表明该方法是有效和可行的。
In the process of field seismic data acquisition,there are a large number of single frequency interferences around 50Hz in seismic records when a high-tension line crosses over a seismic line The cross correlation function is an essential means of determining the single frequency interference frequency.This paper,based on the principle of cross correlation,provides a method of fractional search for getting the interference frequency.The synthetic data examples indicate that the accuracy of the frequency should reach 0.001Hz so as to get a better suppression result.The synthetic and real data examples illustrate that the proposed method is feasible and effective.It also illustrates that the operational efficiency is the highest.
In the process of field seismic data acquisition,there are a large number of single frequency interferences around 50Hz in seismic records when a high-tension line crosses over a seismic line The cross correlation function is an essential means of determining the single frequency interference frequency.This paper,based on the principle of cross correlation,provides a method of fractional search for getting the interference frequency.The synthetic data examples indicate that the accuracy of the frequency should reach 0.001Hz so as to get a better suppression result.The synthetic and real data examples illustrate that the proposed method is feasible and effective.It also illustrates that the operational efficiency is the highest.
引文
[1]凌云,郭向宇.非地表一致性噪声的压制[J].石油地球物理勘探,1992,27(1):13～28.
[2]Sauicer A,Marchant M,Chouteau M.A fast and accu-rate frequency estimation method for canceling harmonic noise in geophysical records[J].Geophysics,2006,71(1):7～18.
[3]刘洋.强工频干扰波的提取与消除方法[J].石油物探,2003,42(2):154.
[4]高少武.单频干扰识别与消除方法研究[D].成都:成都理工大学,2010.
[5]段云卿,徐小红,高兴友.时间域单频干扰波的识别与压制[J].物探与化探,2006,33(3):266～269.
[6]曹才开,戴日光.基于相关估计辨别工频噪声中的微弱信号[J].电子教学学报,2003,25(2):59～64.
[7]胡博.基于偏相干分析法的工频干扰消除方法研究[D].西安:长安大学,2005.
[8]李国朝,黄庆华.用相关原理确定工频干扰噪声频率探究[J].微计算机信息,2007(1).
[2]Sauicer A,Marchant M,Chouteau M.A fast and accu-rate frequency estimation method for canceling harmonic noise in geophysical records[J].Geophysics,2006,71(1):7～18.
[3]刘洋.强工频干扰波的提取与消除方法[J].石油物探,2003,42(2):154.
[4]高少武.单频干扰识别与消除方法研究[D].成都:成都理工大学,2010.
[5]段云卿,徐小红,高兴友.时间域单频干扰波的识别与压制[J].物探与化探,2006,33(3):266～269.
[6]曹才开,戴日光.基于相关估计辨别工频噪声中的微弱信号[J].电子教学学报,2003,25(2):59～64.
[7]胡博.基于偏相干分析法的工频干扰消除方法研究[D].西安:长安大学,2005.
[8]李国朝,黄庆华.用相关原理确定工频干扰噪声频率探究[J].微计算机信息,2007(1).
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