摘要
在高分辨率黏性补偿处理中,高频噪声会随着频带的拓宽、有效信号的增强而增强,致使剖面信噪比降低。本文针对这一问题,提出了一种基于广义S变换的时变叠前高频噪声压制方法。该方法通过人机交互方式合理地确定地震数据在不同时刻的高频压制范围,使其既可以有效消除叠前数据中的高频噪声,又可以为后续的高分辨率补偿处理预留下合适的拓频空间。与频率-空间域滤波法相比,该方法具有时变和空变滤波特性,并可充分保留有效信号能量,非常适合于叠前高频噪声压制处理。实际数据处理结果充分证明了该方法的有效性。
With broadening frequency band and enhancing effective signal energy during high resolution anelastic compensation,prestack high frequency noise will be boosted up,which cause lower signal to noise ratio on seismic sections.Therefore we present here a time varying method of prestack high frequency noise suppression based on generalized S transform.This method can reasonably determine high frequency suppression scope by interaction between man and computer,by which high frequency noise in prestack seismic data can be restrained and the reasonable space of deep layer can be reserved in advance for broadening frequency bandwidth in the late stage of high resolution compensation processing.This method can construct time-varying and spatial-varying filter which can better reserve effective signal energy compared with the frequency-space deconvolution filter.The real data processing results indicated that this prestack high frequency noise suppression method based on the generalized S transform is very effective.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2011年第4期545-549,667+493-494,共5页
Oil Geophysical Prospecting
基金
国家自然科学基金重点基金项目(40930422)
国家科技重大专项(2008ZX05008-006
2008ZX05023-005-010
2008ZX05025-001-005)联合资助
关键词
黏性补偿
广义S变换
时频分析
叠前高频噪声
噪声压制
anelastic compensation,generalized S transform,time-frequency analysis,prestack high frequency noise,noise suppression
