基于时频分析技术预测碳酸盐岩缝洞储层

塔河油田及其外围地区的主要含油气储层之一的缝洞型储层其地震反射频率特征相对于围岩的反射频率特征发生明显的变化，这种频率特征可以用时频分析技术来刻画。将S-变换方法应用于碳酸盐岩缝洞储层的地震反射波的时频分析中，通过分析离散频率能量体的变化特征，可以确定充填流体或气体的孔洞储层引起的地震反射波振幅和频率的变化异常，合成地震记录与野外实际地震记录的时频分析结果，以及钻遇储层发育及其含油气性情况对比均比较吻合，说明该方法可明显提高储层预测的精度。

The Prediction of Carbonate Rock Reservoir with Crack-vug by the Reflection Time-frequency Analysis

Crack vug type reservoir is one of the primary reservoir types in the Tahe oil field and its peripheral area, and its seismic reflection frequency characteristics are different from those of surrounding rocks. The characteristics can be described by time frequency analysis technology. This paper applies S-transforms to the time frequency analysis of seismic reflections of carbonate rock crack vug reservoirs. The abnormity of seismic amplitude and frequency caused by the crack vug reservoir filled with fluid or gas can be determined by analyzing the characteristics of discrete frequency energy cubes. The time frequency analysis calculated from synthetic and field seismic data are well tallied with the crack growth and oil and gas bearing in reservoir. The accuracy of reservoir prediction will be obviously raised by the method mentioned above.