傅立叶相关系数滤波的实践

An application of Fourier correlation coefficient filtering

胜利油田有限公司物探研究院,东营257022

the Research Institute of Geophysical Exploration, Shengli Oilfield Company Limited, Dongying 257022

傅立叶相关系数是指2个频率成份或波数成份的相位差的余弦。利用傅立叶相关系数建立一个滤波器,在FX域或FK域利用频率和时差把相干干扰从地震记录中分离出来。它的假设条件是有效信号的倾角小于相干干扰,其优点是运算简捷,参数少,效率高,在实际地震资料处理中取得了满意的效果。

Fourier correlation coefficient is the cosine of phase differences between two frequency or wavenumber components. A filter has been designed by using Fourier correlation coefficients, which can used to separate coherent noises from signals in seismic data either in FK or FX domains on the assumption that the dip of signals is less than that of coherent noises. The advantages of the method are simple and fast in computation and less in parameters. Satisfactory results have been obtained in real data processing.