摘要
为了克服常规谱白化方法无法同时增强时域和频域局部细节的不足,提出了一种对地震信号的Hilbert谱进行谱白化的高分辨率增强方法。首先利用Hilbert-Huang变换对地震信号进行时频分解,再通过白化滤波器对其Hilbert谱进行谱白化。使用合成和实际地震数据与常规谱白化方法进行对比,结果表明,此方法能够有效增强地震信号时域和频域的分辨率,使地震剖面更为连续和清晰,并具有较高的信噪比。
Conventional spectral whitening method cannot improve the detailed information of both time domain and frequency domain at the same time,to amend this problem,a novel method was proposed to improve the resolution of seismic signal by whitening its Hilbert spectral.This method decomposed the signal in time-frequency domain by the Hilbert-Huang transformation,and then applied the whitening filter to its Hilbert spectral.After comparing this new method with conventional method by applying them to synthetic seismic data and real seismic data,the results show that the new method can improve the resolution of signals both in time and frequency domains effectively while keeping a high S/N ratio,and improve the continuity of events in seismic profile.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2012年第1期50-54,共5页
Journal of China Coal Society
基金
国家科技重大专项资助项目(2011ZX05040-002)
国家重点基础研究发展计划(973)资助项目(2006CB202208)
