中值在地震资料处理中的应用  

Application of median in seismic data processing.

作　　者：李小红[1] 汪晓兵[1] 肖都建[1] 朱学江[1] 

机构地区：[1]中国石化河南石油勘探局地质调查处,河南南阳473132

出　　处：《石油物探》2004年第3期248-250,共3页Geophysical Prospecting For Petroleum

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.

关 键 词：地震资料 中值叠加法 信噪比 地震勘探 多次覆盖技术 CMP 

分 类 号：P631.44[天文地球—地质矿产勘探]