环形非对称中值滤波技术在可控震源资料去噪处理中的应用
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摘要
横向中值滤波是地震资料去噪处理中常用的方法,但对数据有较为严格的要求,否则便达不到理想的去噪效果。叠前可控震源资料满足中值滤波方法的应用条件(即能量一致、波形统一和时间对齐),但样点较少时,常规中值滤波会因样点不足而产生边界效应问题。为此,提出了环形中值滤波技术,即将样点首尾相接,这样在样点不足时可由邻道数据补充。针对可控震源资料中存在的多道连续出现强噪声这一问题,提出了环形非对称中值滤波技术,给出了含强噪声样点的识别方法和替换方法。基于理论模型和实际可控震源资料,讨论了环形非对称中值滤波技术的正确性、实用性和适用范围。
Lateral medium filtering is a general method in the de-noising of seismic data.As the samples have more stringent requirements in the median filtering,de-noising effect is sometimes not ideal.Prestack seismic data acquired by vibroseis meets the application conditions of median filtering method(namely,the same energy,unified waveform and time alignment).However,the boundary effect of conventional median filtering is more prominent when the samples for participating median filtering is few.Therefore,the donut,end to end median filtering was proposed.By using this method,samples of participating median filtering can be supplemented by the neighboring data when they are not enough for median filtering.Aiming at the problem that strong noise exists continuously in more traces in seismic data acquired by vibroseis,donut-asymmetric median filtering method was proposed,which gives the method for recognizing the samples with strong noise and their replacement method. Based on theoretical model and real seismic data acquired by vibroseis, the validity,practicability and applicable scope of the donut -asymmetric median filtering technology is discussed.
Lateral medium filtering is a general method in the de-noising of seismic data.As the samples have more stringent requirements in the median filtering,de-noising effect is sometimes not ideal.Prestack seismic data acquired by vibroseis meets the application conditions of median filtering method(namely,the same energy,unified waveform and time alignment).However,the boundary effect of conventional median filtering is more prominent when the samples for participating median filtering is few.Therefore,the donut,end to end median filtering was proposed.By using this method,samples of participating median filtering can be supplemented by the neighboring data when they are not enough for median filtering.Aiming at the problem that strong noise exists continuously in more traces in seismic data acquired by vibroseis,donut-asymmetric median filtering method was proposed,which gives the method for recognizing the samples with strong noise and their replacement method. Based on theoretical model and real seismic data acquired by vibroseis, the validity,practicability and applicable scope of the donut -asymmetric median filtering technology is discussed.
引文
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13邬达理,姜游,陈竹梅.串联匹配滤波法在混合震源资料处理中的应用[J].石油物探,2006,45(6):611-614
14陈志卿,张兰.子波一致性校正方法在地震资料处理中的应用——以伊朗Kashan区块为例[J].石油物探, 2006,45(2):169-172
15耿春,尹成,张白林.分数Fourier变换在可控震源信号处理中的应用[J].工程地球物理学报,2006,3(6): 427-436
16蒋忠进,邱小军,林君,等.小波变换回波提取在可控震源地震信号处理中的应用[J].石油地球物理勘探, 2006,41(6):687-691
2 Galagher N C,Wise G L.A theoretical of the properties of median filters[J].IEEE Transactions on Acoustics, Speech and Signal Processing,1981,29(6): 1 136-1 140
3 Nodes T,Gallagher N.Median filters:some modification and their properties[J].IEEE Transactions on Acoustics, Speech and Signal Processing,1982,30(5): 739-746
4夏洪瑞,董江伟,邹少峰,等.常规二次多项式拟合地震数据[J].石油物探,2006,45(5):492-496
5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):297-299
6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):29-33
7鲍祥生,尹成,田继东,等.中值滤波的一种快速算法[J].石油物探,2005,43(4):325-328
8刘祝华,邹道文,邓承志,等.改进的中值滤波算法应用于的冲噪声的滤除[J].江西师范大学学报(自然科学版),2004,28(5):383-386 9蓝加达.可控震源非线性扫描在高分辨率地震采集中
的应用[J].石油物探,2008,47(2):208-211
10程金箴.模拟变频扫描——同时提高分辨率和信噪比的可控震源扫描方法[J].勘探地球物理进展,2002,25 (2):1-10
11曹务祥.可控震源非线性扫描参数的定量选取[J].石油物探,2004,43(3):242-244
12赵明秋,牛建国.连接不同震源数据的匹配滤波技术[J].石油地球物理勘探,2007,42(增刊1):136-140
13邬达理,姜游,陈竹梅.串联匹配滤波法在混合震源资料处理中的应用[J].石油物探,2006,45(6):611-614
14陈志卿,张兰.子波一致性校正方法在地震资料处理中的应用——以伊朗Kashan区块为例[J].石油物探, 2006,45(2):169-172
15耿春,尹成,张白林.分数Fourier变换在可控震源信号处理中的应用[J].工程地球物理学报,2006,3(6): 427-436
16蒋忠进,邱小军,林君,等.小波变换回波提取在可控震源地震信号处理中的应用[J].石油地球物理勘探, 2006,41(6):687-691
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