基于频率衰减特性的面波压制方法
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
在地震资料常规处理过程中,通常在整个地震记录上进行高通滤波来消除低频面波,而很少考虑面波的频率衰减特性。这种方法的缺点在于压制面波的同时,地震记录上有效的低频信号也受到压制。为了克服常规压制面波方法的缺点,提出了一种新的衰减面波的处理方法:在地震记录上确定面波带,然后针对不同的炮检距选用不同的低切频在面波带里进行高通滤波。通过这样的处理,既可以保证面波的压制仅在面波带里进行,又可以较准确地确定不同炮检距的面波频率范围,从而有效地衰减了面波带里的面波能量,较好地保存了地震记录上的有效低频反射波成分。
In seismic data process using conventional method,high pass filtering is usually carried out on seismic record to attenuate the low frequency surface wave without taking the characteristic of fre- quency attenuation into consideration.The conventional method has the disadvantage of suppressing effective low-frequency signals as well as surface wave.Aiming at this problem,a new method for attenuating surface wave was proposed,whose principles are that 1)the surface wave band is determined on seismic record,and 2) different low-cut frequencies are selected for high pass filtering in surface wave band with different offsets.Through the processing, surface wave attenuation can be surely carried out in surface wave band and can accurately identify the surface wave frequency range for different offsets.So,the energy of surface wave can be attenu- ated in surface wave band,and the effective low-frequency reflec tion waves can be well preserved.
引文
1何樵登.地震勘探原理和方法[M].北京:地质出版社,1986.117
    2罗国安,杜世通.小波变换及信号重建在压制面波中的应用[J].石油地球物理勘探,1996,31(3):337~349
    3王振国,周熙襄,钟本善.小波包对叠前地震面波的分离与信号重建[J].石油地球物理勘探,2002,37(5):460~462,472
    4刘财,王典,杨宝俊.二维小波变换在地震勘探面波消除中的应用[J].地球物理学进展,2003,18(4):711~714
    5张华,潘冬明,红兴岩.二维小波变换在去除面波干扰中的应用[J].石油物探,2007,46(2):147~150
    6牛滨华,吕景贵,孙春岩,等.叠前面波干扰压制方法的研究与应用[J].现代地质,2001,15(3):326~332
    7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
    8唐建明.地震资料面波波形计算研究[J].石油物探,2002,41(3):321~326
    9李国发,彭苏萍,高日胜,等.转换波地震资料中面波的压制[J].石油物探,2005,44(3):214~216

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心