S变换时变滤波在去噪处理中的应用研究
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摘要
针对常用的滤波去噪方法都受到使用条件的限制,实际资料的滤波去噪不能达到良好效果,S变换时变滤波克服了传统滤波去噪方法滤波因子不能随时间、频率变化而变化的缺陷。将地震资料用S变换方法变换到时频域,对不同时间内不同频率的噪声部分充零,再将去噪后的地震数据利用S反变换到时间域,以获得所需要的有效信号。通过理论计算分析和实例计算表明,S变换时变滤波能够有效去除不同时段、不同频率的噪声。该方法具有一定的可行性。
There are several kinds of filtering methods to diminish the noises.However,all of them are restricted by operating conditions,as a result,a satisfactory effect of filtering can not be obtained from actual data.Time variable filtering with S-transform overcomes the shortage that the filtering factors in traditional filtering and denoising approaches will not change with time and frequency variation.Seismic data are transformed to time-frequency domain by using the S-transformation methods,then,the noises at different time intervals and with different frequencies are zeroized partly.Finally,the seismic data after noise elimination are transformed into time domain again by using S-inverse transformation to achieve the effective signals needed.Based on theoretical and real seismic data calculation,it is believed that S-transform is really an effective method eliminating noises at different time intervals and with different frequencies.
There are several kinds of filtering methods to diminish the noises.However,all of them are restricted by operating conditions,as a result,a satisfactory effect of filtering can not be obtained from actual data.Time variable filtering with S-transform overcomes the shortage that the filtering factors in traditional filtering and denoising approaches will not change with time and frequency variation.Seismic data are transformed to time-frequency domain by using the S-transformation methods,then,the noises at different time intervals and with different frequencies are zeroized partly.Finally,the seismic data after noise elimination are transformed into time domain again by using S-inverse transformation to achieve the effective signals needed.Based on theoretical and real seismic data calculation,it is believed that S-transform is really an effective method eliminating noises at different time intervals and with different frequencies.
引文
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[2]赵淑红,朱光明.S变换时频滤波去噪方法[J].石油地球物理勘探,2007,42(4):402-406.
[3]撒利明.用样点加密和补零充位提高频谱分辨率[J].西南石油学院学报,1991,13(1):23-28.
[4]陈爱萍,邹文.基于S-变换的面波压制技术[J].世界地质,2005,24(1):82-86.
[5]彭才,朱仕军,孙建库,等.小波变换域K-L变换及其去噪效果分析[J].石油物探,2007,46(2):112-114.
[6]赵淑红,王璇.S变换时频滤波与其它滤波方法的比较[J].西北地震学报,2007,29(3):224-229.
[7]邹文,陈爱萍,顾汉明.联合时频分析技术在地震勘探中的应用[J].勘探地球物理进展,2004,27(4):246-250,259.
[8]刘兰锋,刘全新,雍学善,等.基于广义S变换的低频瞬时能量谱油气检测技术[J].天然气地球科学,2005,16(2):238-241.
[9]邹文,陈爱萍,贺振华,等.基于S变换的地震相分析技术[J].石油物探,2006,45(1):48-51.
[10]刘喜武,年静波,刘洪.基于广义S变换的地震波能量衰减分析[J].勘探地球物理进展,2006,29(1):20-24.
[2]赵淑红,朱光明.S变换时频滤波去噪方法[J].石油地球物理勘探,2007,42(4):402-406.
[3]撒利明.用样点加密和补零充位提高频谱分辨率[J].西南石油学院学报,1991,13(1):23-28.
[4]陈爱萍,邹文.基于S-变换的面波压制技术[J].世界地质,2005,24(1):82-86.
[5]彭才,朱仕军,孙建库,等.小波变换域K-L变换及其去噪效果分析[J].石油物探,2007,46(2):112-114.
[6]赵淑红,王璇.S变换时频滤波与其它滤波方法的比较[J].西北地震学报,2007,29(3):224-229.
[7]邹文,陈爱萍,顾汉明.联合时频分析技术在地震勘探中的应用[J].勘探地球物理进展,2004,27(4):246-250,259.
[8]刘兰锋,刘全新,雍学善,等.基于广义S变换的低频瞬时能量谱油气检测技术[J].天然气地球科学,2005,16(2):238-241.
[9]邹文,陈爱萍,贺振华,等.基于S变换的地震相分析技术[J].石油物探,2006,45(1):48-51.
[10]刘喜武,年静波,刘洪.基于广义S变换的地震波能量衰减分析[J].勘探地球物理进展,2006,29(1):20-24.
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