改进的F-X域EMD去噪在井间地震数据处理中的应用
熊章强,周安,张大洲
中南大学 信息物理工程学院,湖南 长沙410083
THE APPLICATION OF IMPROVED EMD IN THE FX DOMAIN FOR
NOISE ATTENUATION TO THE PROCESSING OF CROSS WELL SEISMIC DATA
XIONG Zhang-Qiang, ZHOU An, ZHANG Da-Zhou
School of Infophysics and Geomatics Engineering, Central South University, Changsha410083, China
摘要 井间地震作为一种高分辨率地震方法在数据采集时存在大量的随机噪声。笔者采用改进的FX域经验模态分解(empirical mode
decomposition,简称EMD)方法,将信号转换到FX域后分解成一系列固有模态函数,进而通过滤波来达到去噪目的。通过对理论数据和
实际井间地震数据的处理与分析,得出如下结论:此方法不依赖于基函数的选择,具有很强的自适应性,对于消除井间地震数据中的噪声
以及提高地震数据的信噪比有较好的效果。
Abstract :Cross well seismic technology is a high-resolution geophysical method with random noise. In this paper, the improved
Empirical Mode Decomposition (EMD) method in the FX domain is employed for noise attenuation. Signals are decomposed
into a series of intrinsic mode functions (IMFs) after being transformed into the FX domain and then filtered by the
soft threshold function for noise attenuation. The processing of the emulated data and practical data with the improved
EMD method in the FX domain shows a great advantage in noise attenuation for the cross well seismic data and thus can
achieve a good result in improving the SNR of the seismic data. In addition, the method does not depend on the basic
function.
出版日期: 2010-08-10
通讯作者:
熊章强(1963-),男,教授,博士,主要从事工程地球物理地震勘探方向的教学与研究,公开发表学术论文数篇。
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