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希尔伯特黄变换(HHT)利用经验模态分解将地震信号分解为一系列平稳信号,并通过地震复数道构建瞬时振幅、瞬时相位、瞬时频率,从而更具有物理意义.CEEMD方法是一种新的EMD分解方法,解决了常规EMD方法中的“模态混叠”现象,基于CEEMD的时频分析方法能够为储层提供更加精细的刻画能力.模型数据和实际数据的处理结果表明,基于CEEMD的HHT方法,在时频谱方面比常规时频分析方法具有更高的分辨率,对储层的描述能力更为精确.
The Hilbert-Huang Transform (HHT) uses empirical mode decomposition to decompose the seismic signal into a series of stationary signals and construct the instantaneous amplitude, instantaneous phase and instantaneous frequency through the seismic complex number, which makes it more physically meaningful. The CEEMD method is a The new method of EMD decomposition solves the phenomenon of “modal aliasing” in the conventional EMD method, and the time-frequency analysis method based on CEEMD can provide a more refined characterization for the reservoir. The processing results of the model data and the actual data show , The CEEMD-based HHT method has higher resolution in time and frequency spectrum than the conventional time-frequency analysis method, and has more accurate description of the reservoir.