频谱成像技术在高柳地区薄互层砂岩预测中的应用

Application of Frequency-Spectrum Imaging to Thin Sandstone Reservoir Prediction in Gaoliu

频谱成像技术是一种利用三维地震资料的多尺度信息对储层进行高分辨率成像、检测储层时间厚度变化的工具。地震数据振幅谱可以识别地层的时间厚度变化,相位谱可以检测地质体横向不连续性,在确定油藏边界、计算地层厚度方面比传统地震属性研究方法具有更大的优势。文中首先介绍一种先进的频谱成像算法-匹配追踪算法,然后应用此技术对高柳地区薄互层砂岩储层进行识别,结果表明基于匹配追踪算法的频谱成像技术在实验区取得很好的应用效果。

The frequency-spectrum imaging technique is a tool in high resolution imaging and characterizing time depth of layers in reservoir with multi-scale information of 3-D seismic data. This technique has some advantages over some traditional methods of seismic attributes on defining the field of reservoir and computing layer depth, for example, the changes in time depth of layers are identified from the amplitude spectrum of seismic data and we can detect geological body with horizontal un - continue. This paper introduces an advanced algorithm-Matching Pursuit, then we identified the thin sandstone reservoir by using this techniquc. The result shows best performance of the frequency-spectrum imaging technique based on the matching pursuit algorithm in the test area.