匹配追踪时频分析技术在塔河油田缝洞型储层预测中的应用

Match Pursuit Time-Frequency Analysis Technology in the Prediction of Fractured Reservoirs in Tahe Oilfield

为了更准确地刻画碳酸盐岩储层中由缝洞引起的地震信号的时频信息,实现高效率的时频谱分解,引入了一种基于复数道地震记录的匹配追踪算法,阐述了该算法的基本原理及实现过程。基于合成记录进行了不同时频算法的差异性分析,结果表明匹配追踪算法具有较高的时间和频率分辨率。通过该方法开展了塔河油田桑塔木三维工区奥陶系碳酸盐岩储层预测工作,并将预测结果与钻井数据进行了对比分析,实钻溶洞吻合率为89.7%,证实这种技术预测效果较好,可以在相似储层类型区推广应用。

Seismic frequency technology helps to bring the frequency characteristics of seismic reflection in carbonate reservoirs caused by the seam holes. Early Fourier, wavelet transform spectral decomposition technique is constrained by the uncertainty principle, time domain, frequency domain resolution of mutual restraint, so a higher precision time-frequency analysis cannot be simultaneously achieved. Based on matc- hing the complex seismic trace recorded spectral decomposition method is an adaptive wavelet decomposi- tion method to obtain a high precision time-frequency analysis. This paper made an Ordovician carbonate reservoir prediction in a three-dimensional work area, Sangtamu Tahe Oilfield by this method. The predic- tion results were compared with the well data analysis, and the actual drilling cave anastomosis was 89.7%, which has achieved a good effect.