Hilbert-Huang 变换在阵列声波测井信号时频分析中的应用
网络出版日期: 2010-03-15
基金资助
国家自然科学基金项目(编号:40874059)资助
Application of Hilbert-Huang transform in time-frequency analyisis of array acoustic signals
Online published: 2010-03-15
王春连 , 侯中健 , 刘丽红 . Hilbert-Huang 变换在阵列声波测井信号时频分析中的应用[J]. 岩性油气藏, 2010 , 22(1) : 93 -97 . DOI: 10.3969/j.issn.1673-8926.2010.01.017
Array acoustic logging signal is a non-linear and non-stationary signal. Hilbert-Huang transform(HHT) is a new method developed for non-linear and non-stationary signal. The key step of this method is to apply the empirical mode decomposition (EMD)on signal, decomposing the signal into several intrinsic mode functions (IMF), and then time-frequency spectrum of the signal can be obtained. The HHT is applied to array acoustic logging signal processing, and EMD is used to decompose the signal into several IMF, and then the smooth pseudo Wigner-Ville distribution is obtained. Through the analysis, the difference between the water bearing layer and dry layer can be obtained.
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