摘要
在野外地震数据采集过程中,地震测线上方如果有高压输电线通过,在地震记录中就存在一个50 Hz左右的强单频干扰波。在时间域内利用正弦波逼近强单频干扰波,并从地震记录中减去它,以实现压制这种干扰波的目的。理论记录试算和实际资料处理结果表明,即使是对于常规滤波方法难以消除的极强的单频干扰,该方法仍然获得了较好的效果。本方法的最大优点是仅对单频干扰波进行有效的压制,对有效波的损失很小。
There is a strong single frequency interference wave around 50 Hz in seismic records when a high-tension line crosses over a seismic line in the process of field seismic data acquisition. The authors studied the interference wave using sine wave in time domain and subtracted it from seismic records for the purpose of suppressing the interference wave. Theoretical and real data results prove the feasibility of the method in suppression of strong single frequency which is unlikely to be suppressed by conventional filtering methods. The most major advantage of the method lies in the fact that only the interference wave with single frequency can he suppressed, and the loss of useful signal is very limited.
出处
《物探与化探》
CAS
CSCD
2006年第3期266-269,275,共5页
Geophysical and Geochemical Exploration
关键词
地震勘探
单频干扰
时间域
滤波方法
seismic exploration
single frequency
time domain
filtering methods
