摘要
在地震资料处理和解释的过程中,振幅增益控制应用十分广泛。本文在分析常用振幅增益控制(AGC)技术不足的基础上,提出了一种基于希尔伯特变换的振幅增益控制方法(简称包络AGC)。包络AGC的基本原理是对地震道振幅包络进行振幅值分解,求出振幅正常值分量和异常值分量;然后,对异常值分量加权,并回加到正常值分量中,从而得到新的振幅包络;最后,根据新的振幅包络计算地震道实数域的振幅值就可实现包络AGC。实际地震资料应用结果表明,文中提出的包络AGC具有可实现性且具备一定的实际应用价值。
Amplitude gain control is widely used in seismic data processing and interpretation.Based on an analysis of the shortcomings of conventional amplitude gain control(AGC),this paper presents an amplitude gain control method(envelope AGC) based on Hilbert transform.The basic principle is to decompose the amplitude envelope of seismic trace,get the normal amplitude and abnormal amplitude,then extract and add the abnormal value components to the normal value components by weighting,and finally conduct inverse transform to t-x domain to realize envelope AGC.The application results of actual seismic data show that the envelope AGC is realizable and has certain practical application value.
作者
刘玉萍
李丽青
张宝金
LIU Yu-Ping;LI Li-Qing;ZHANG Bao-Jin(Guangzhou Marine Geological Survey,China Geology Survey,Guangzhou 510760,China;Southern Marine Science and Engineering Guangdong La-boratory(Guangzhou),Guangzhou 511458,China;Key Laboratory of Marine Mineral Resources,Ministry of Natural Resources,Guangzhou 510075,China)
出处
《物探与化探》
CAS
北大核心
2020年第4期790-795,共6页
Geophysical and Geochemical Exploration
基金
中国地质调查局项目“海洋地质海洋测绘XXXX信息系统建设及产品开发”(DD20191007),“南海岩石圈XXXX”(DD20201118)
南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项“南海深海盆区莫霍面地震反射空间分布研究”(GML2019ZD0207),“南海地壳深部结构精细成像及海盆形成演化研究”(GML2019ZD0208)。
