相关原理在压制地震单频干扰中的应用研究

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

在野外地震采集数据的区域,由于有工业电线,导致地震记录存在着大量50Hz的单频噪声。互相关函数是确定单频干扰噪声频率重要手段。以相关原理为基础,提出分步搜索的快速算法得到高精度干扰频率。合成数据得出频率估算精度达到0.001Hz能达到较好压制效果。理论试算和实际地震资料处理结果表明该方法是有效和可行的。

In the process of field seismic data acquisition, there are a large number of single frequency interferences around 50Hz in seismic records when a high -tension line crosses over a seismic line The cross correlation function is an essential means of determining the single frequency interference frequency. This paper, based on the principle of cross correlation, provides a method of fractional search for getting the interference frequency. The synthetic data examples indicate that the accuracy of the frequency should reach 0. 001Hz so as to get a better suppression result. The synthetic and real data examples illustrate that the proposed method is feasible and effective. It also illustrates that the operational efficiency is the highest.