利用FKSUB消除局部规则干扰波

利用正交多项式拟合规则干扰同相轴的视频角和振幅的变化规律，与滤波因子随时空变化绵窄阻带二维滤波技术相结合，形成了一各有效剔除任意复杂规则干扰波的方法（ＦＫＳＵＢ）。ＦＫＳＵＢ只对地震记录上的局部区域进行处理，即在用户给定的任意形状时窗内，根据规则干扰与有效信号在视速度，频率和振幅分布三个方面的差异来剔除局部规则干扰波。ＦＫＳＵＢ经过两年多的生产应用，效果明显，可剔除叠前，叠后剖面上任意形状的各种局

Local regular noise elimination using FKSUB model

FKSUB method for eliminating any regular noises has been formed by fitting the variational regularities of apparent dip and amplitude of regular noise leg with the use of orthogonal polynomials, and using the narrow reject-band 2-D filtering technique whose filter operator varies with time and space. FKSUB method is only applied to the data in a local area of a seismic section. To speak exactly,in a given window, FKSUB method removes regular noise by using the differences between regular noise and signal in three aspects: apparent velocity, frequency and ampli-tude. Two years' application proves FKSUB method obviously effective. It can e-liminate any regular noises in prestack and poststack sections, and favour high fi-delity, following special processing and modification of the seismic sections.