孤岛油田水淹层变化规律研究

Variation of Water-flooded Zone in Gudao Oilfield

孤岛油田经过40余年的开发,已经进入高含水生产阶段。研究结果表明水淹程度和注入水性质控制电阻率曲线特征变化和储层特征变化,岩石润湿性随着含水饱和度越高由亲油向亲水方向逐渐变化。随着油层含水饱和度的增加,流体特征发生一系列变化,与原始油层区别较大。

The Gudao oil field after 40 years of development,has entered high water cut stage.Water flooding degree and injection water nature control resistivity curves change and change of reservoir characteristics.Rock wettability changes from lipophilicity to hydrophily along with rising of water saturation.With rising of reservoir water saturation,fluid characteristics have a series of changes,larger difference with the original reservoir.