中值在地震资料处理中的应用
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摘要
如何提高地震资料的信噪比,一直是地震资料处理的关键。分析中值在统计意义上的“稳定性”,利用这一特性以保留处于“中间位置的数值”,去除数学信号中的极值,使输出信号的信噪比得以提高。地震资料处理时,在炮集记录时间方向上使用中值滤波,可以剔除采集过程中产生的野值,提高单炮的信噪比。叠加时使用中值叠加,可以在空间方向上去除噪音,有效地提高叠加剖面的质量。所给出的实例说明了该方法的效果明显,且保真度较高。
It is always important to improve the S/N ratio
of seismic data in seismic processing. Median is sta-
tistically stable. Making use of this characteristic,
we can keep the numbers in the medial position and
remove the extreme numbers. The S/N ratio is
therefore improved. During seismic data processing,
we could use median filter in the time direction of
shot-records to remove the abnormal values resulted
from acquisition, and then use median stacking to
suppress the spatial noises. The effect of this method
is illustrated by examples.
It is always important to improve the S/N ratio
of seismic data in seismic processing. Median is sta-
tistically stable. Making use of this characteristic,
we can keep the numbers in the medial position and
remove the extreme numbers. The S/N ratio is
therefore improved. During seismic data processing,
we could use median filter in the time direction of
shot-records to remove the abnormal values resulted
from acquisition, and then use median stacking to
suppress the spatial noises. The effect of this method
is illustrated by examples.
引文
1 朱光明.垂直地震剖面方法[M].北京:石油工业出版社,1988． 92～100
2 牟永光.地震勘探资料数字处理方法[M].北京:石油工业出版社,1986． 160～162
3 王卫华.利用中值相关滤波预测干扰信号[J].石油地球物理勘探 2000,35(3) :273～282
4 徐常练.叠前中值滤波[J].石油地球物理勘探,1992,27(3) :387～396
5 冯晅,刘财,杨宝俊,等.中值滤波器对信号相位和形状影响的研究[J].石油物探,2002,41(1) :37～41
2 牟永光.地震勘探资料数字处理方法[M].北京:石油工业出版社,1986． 160～162
3 王卫华.利用中值相关滤波预测干扰信号[J].石油地球物理勘探 2000,35(3) :273～282
4 徐常练.叠前中值滤波[J].石油地球物理勘探,1992,27(3) :387～396
5 冯晅,刘财,杨宝俊,等.中值滤波器对信号相位和形状影响的研究[J].石油物探,2002,41(1) :37～41
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