摘要
以往压制地震记录中的单频干扰有许多成功的方法,如频率域陷波法及时间域拟合法,其中以时间域拟合法压制强能量单频干扰最有效。但是拟合法通常采用基于频率扫描法搜寻单频波频率的方式,比较耗时,不能满足当前日益增长的高覆盖、高密度地震勘探数据处理的需要。本文提出应用基于Chirp-Z变换的高精度谱分析技术估计单频波的频率,不仅提高了计算效率,而且在压制单频干扰的同时有效保护了在单频干扰频率附近的有效信号。
There have been many former successful methods for suppression of mono-frequency interference on seismic records,such as notch filter in frequency domain and fitting method in time domain,in which the fitting method in time domain is very efficient for suppression of mono-frequency interference with strong energy.But the fitting method usually used looking for the frequency of mono-frequency wave by frequency scanning that is more time-consuming,which is not able to meet the needs of currently increasing high-coverage and high-density seismic data processing day by day.The paper presents using Chirp-Z transform-based high-precision spectrum analysis technique to evaluate the frequency of mono-frequency wave,which not only improves computational efficiency,but also effectively protects the useful signal near the frequency of mono-frequency interference while suppression of mono-frequency interference.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2009年第2期166-172,共7页
Oil Geophysical Prospecting
关键词
地震数据采集
单频干扰
Chirp—Z变换
线性调幅调频谱
seismic data acquisition,mono-frequency interference,Chirp-Z transform,linear amplitude-modulated and frequency-modulated spectrum
