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在大型3-D地震勘探中,在利用地震数据和其离散傅里叶变换(DFT)对时间地层厚度和地质不连续体进行成像和作图时,频谱分解为之提供了一种新颖的方法。经DFT把地震数据变换到频率域,振幅谱描绘时间地层厚度的变化,而相位谱则显示了地质体的横向不连续性。在3-D地震勘探中,用该技术已经确定了地层的形成环境(如河道砂和涉及复杂断层系统的构造环境)。
In large-scale 3-D seismic exploration, a novel approach to spectral decomposition into seismic imaging and mapping of temporal formation thickness and geological discontinuities using seismic data and its Discrete Fourier Transform (DFT) . Transforming the seismic data into frequency domain by DFT, the amplitude spectrum depict the change of time stratigraphy thickness, while the phase spectrum shows the lateral discontinuity of the geological body. In 3-D seismic exploration, formation of the formation has been identified using this technique (eg channel sand and tectonic setting involving complex fault systems).