异常振幅衰减法压制海上船噪声干扰  

Offshore vessel noise interference suppression with the anomalous amplitude attenuation method

作　　者：杨爽 王彦春[1] 何俊强[1] YANG Shuang;WANG Yanchun;HE Junqiang(China University of Geosciences（Beijing）,School of Geophysics and Information Technology,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083

出　　处：《物探化探计算技术》2018年第3期306-310,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项项目(2016ZX05003-003)

摘　　要：海上船噪声干扰是海洋地震数据中的主要干扰波之一,由于其反射同相轴符合地震时距曲线规律,且其频谱与有效信号基本重叠,用滤波等常规噪声压制技术很难对其进行有效地压制。由于海上船相对于地震采集拖缆的位置具有随机性,共炮点域中的规则船干扰在共偏移距域内变为随机强能量噪音,为此提出一种用异常振幅衰减法压制海上船噪声干扰的方法,其思路是先将炮集抽成共偏移距道集,然后用异常振幅衰减法对船噪声干扰进行压制。通过对实际海洋地震资料进行处理,得到了良好的应用效果。The offshore vessel noise interference is one of the main interference in marine seismic data.It can＇t be suppressed efficiently by normal noise suppression method due to that its reflection event is accord with the law of time distance curve and its frequency spectrum overlaps effective signals.The high energy noise can be suppressed efficiently by the anomalous amplitude attenuation method.The data is decomposed into a series of subset of different time windows and different frequencies,and then the high energy noise could be identified and suppressed in each data subset.The location of the offshore vessel is random relatively to the seismic cable,and the regular offshore vessel noise interference in common shot domain become irregular high energy noise in common offset domain.Therefore,the method of suppressing the offshore vessel noise with the anomalous amplitude attenuation method is presented.The seismic data in common shot domain is transferred into common offset domain,then the anomalous amplitude attenuation method is used to suppress the offshore vessel noise.And great success was obtained in the field marine seismic data processing.

关 键 词：船噪声干扰 异常振幅 共偏移距 海洋地震 

分 类 号：P631.4[天文地球—地质矿产勘探]