摘要
单频干扰常常会将有效信号掩盖,严重影响了地震勘探数据的处理、解释。为了提高单频干扰压制的效果,研究了一种自动识别及消除单频干扰的新技术。该技术可在频率域快速识别出强单频干扰,利用奇异值分解(SVD)的特性,并用含有单频干扰的地震道构建Hankel矩阵,利用Hankel矩阵的奇异值分布与信号振幅谱之间的对应关系,通过奇异值分解和重构,可有效压制地震道中的单频干扰。模型数据和实际资料测试表明:该方法对强单频干扰具有较好的识别和压制效果,并且对有效信号伤害较小。
Single-frequency interference often covers desired signals,influencing seriously the processing and interpretation of seismic exploration data.The research has been made on a new technology which can automatically identify and eliminate single-frequency interference to improve the effect of such interference suppression.This technology can identify quickly strong single-frequency interference in the frequency domain and can build Hankel matrix based on SVD(singular value decomposition)character and seismic trace with single-frequency interference which can be suppressed effectively by using correspondent relationship between singular value distribution in Hankel matrix and signal amplitude spectrum and through singular value decomposition and reconstruction.Model data and actual data testing show that this technology has a better effect in identification and suppression of strong single-frequency interference and has a less harm on desired signals.
作者
郭利荣
GUO Lirong(Geophysical Prospecting Research Institute of Jianghan Oilfield Company,SINOPEC,Wuhan,Hubei,430045China)
出处
《江汉石油职工大学学报》
2019年第4期11-13,30,共4页
Journal of Jianghan Petroleum University of Staff and Workers
