谱分解技术及其在井间储层解释中的应用

The technique of spectral decomposition and its application in cross-well reservoir interpretation

谱分解技术将一个短时窗内的地震数据通过离散的傅立叶变换或最大熵谱估计转换为频率域,去除子波的影响后,利用频率—振幅谱来识别薄层和不连续地质体的边界。运用该技术在樊124井区含油层系准确地描述出河道砂分布,并利用不同频率切片描述出河道砂体的边界,为该区精细解释提供了依据。

A spectrum decomposition technique transforms the seismic data into frequency domain via the DFT or maximum entropy method in a short time window, delineates thin bed and the boundaries of discontinuous geologic bodies by analyzing the amplitude spectrum after removing the wavelet overprint. The distribution of fluvial channel sands in the hydrocarbon reservoir assemblage in Fan 124 well area were delineated by using the technique, the basis were provided for the fine interpretation in this area.