摘要
自动检测和抑制地震记录中猝发噪声的处理过程可在单道记录上频率滤波+动平衡的基础上进行。猝发噪声抑制前所做的长时窗动平衡,有利于猝发噪声的“显露”,其后的短时窗动平衡+频率滤波过程以消除高频“毛刺”干扰及记录中浅深层能量的均衡.猝发噪声的检测与衰减不需滑动时窗进行.即每次处理的时窗长度等于道长,因而该算法简单、高效.文中所述方法也可用于迭后剖面上异常大振幅的自动检测与衰减,并能有效地减少由于点脉冲记录引起的偏移剖面上的“画弧”现象.
The process of auto-predicting and eliminating pulse noise in seismic data can be conducted on the basis of frenquency filter+dynamic balance in single channel record. The long time window dynamic balance conducted before pulse noise elimination benefits the appearance of pulsenoise. The subsequent short time window dynamic balance + frenquency filter eliminate the high frequency 'burr' interference and record the energy balance of sub-shallow-deep beds. The prediction and elimination of pulse noise do not need sliding time window, i. e,each processing time window length is equal to the channel length. So this algorithm is simple and efficient. The method described here can also be used in auto-prediction and attenuation of extremely big amplitude on iterated profiles, and can effectively reduce 'arc curve' on offset profiles resulting from point pulse records.
出处
《物探化探计算技术》
CAS
CSCD
1993年第4期316-320,共5页
Computing Techniques For Geophysical and Geochemical Exploration
