相关原理在实际地震资料中识别与压制单频干扰的应用研究  

Research on Identification and Suppression of Single Frequency Interference from Seismic Records Based on Cross Correlation Principle

作　　者：刘恋[1] 张鹏 Liu Lian;Zhang Peng(Anhui Geological Exploration Technologies Institute,Heifei Anhui 230031,China)

机构地区：[1]安徽省勘查技术院,安徽合肥230031

出　　处：《工程地球物理学报》2018年第2期241-245,共5页Chinese Journal of Engineering Geophysics

摘　　要：野外地震资料采集过程中,由于采集区域有工业电线等因素,接受到的地震数据存在大量单频干扰。为了自动识别和压制这些单频干扰,提高地震资料性噪比,以相关原理为基础,提出一种对地震记录中单频干扰自动识别的方法。该方法是对地震记录做自动增益控制处理后计算与正余弦函数的互相关值来自动识别含有单频干扰地震道。将含有单频干扰的地震道用相关原理来估算单频干扰频率和振幅,然后在时间域将单频干扰去除,通过对实际数据应用,发现本方法可以有效识别和压制单频干扰。In the process of field seismic data acquisition,a large number of single frequency interference is received due to the factors such as industrial wires in the acquisition area.In order to automatically identify and suppress these single frequency interference,improve the seismic data noise ratio,a method for automatic identification of single frequency interference in seismic records is proposed on the basis of related principles in this paper.The method is to automatically identify the seismic traces containing single frequency interference after automatic gain control processing of seismic records by means of the cross correlation between the computed and the sine and cosine functions.Also,the frequency and amplitude of single frequency interference are estimated by correlation principle,and the single frequency interference is removed in time domain.It is found that this method can effectively identify and suppress single frequency interference in actual data.

关 键 词：地震勘探 互相关 自动增益控制 单频干扰 时间域 

分 类 号：P631.4[天文地球—地质矿产勘探]