摘要
在目前还没有办法彻底进行信噪分离的背景下 ,提出了一种在去噪的同时把对有效波的损害减少到最小的处理方法。该方法首先采用小波分频的办法 ,使没有相干干扰的频段信号在去噪的过程中不受损失。在有相干干扰区采用分时窗的办法 ,使去噪处理仅在有干扰的区域内进行。相干干扰的拾取是利用均值加权法实现的 ,该方法识别噪音准确 ,因而具有较强的实用性。实际资料处理表明 ,这是一种既消除相干干扰又使有效波损失最小 ,且负效应极小的去噪方法。
This paper presents a data processing method for nois e removal which ca n decrease the damage to the effective waves to the minimum. For signals in freq uency segments without coherent disturbance the wavelet frequency-division is a d opted to remove noises. For signals with coherent disturbance the window-divisi o n is adopted to make the noise removal processing performed only within segments with disturbance. The picking of coherent disturbance is based on the mean valu e weighting technique, which is new, precise, and practical for noise picking. R eal data processing demonstrates that the method can eliminate coherent disturba nce while fully preserving effective waves from loss and its negative effect is very small.
出处
《石油物探》
EI
CSCD
北大核心
2000年第2期77-82,共6页
Geophysical Prospecting For Petroleum
关键词
相干干扰
小波分频
均值加权
去噪
地震勘探
coherent disturbance, wavelet frequency-di vision, mean value weighting