微观剩余油仿真实验研究

针对仿真孔隙模型、人造砂岩模型和砂岩微观孔隙模型,通过模拟实验对微观剩余油分布进行了综合研究,探讨了水驱油微观机理,归纳出水驱后剩余油的分布规律,研究了活性水以及聚合物驱后的剩余油分布规律。研究认为：仿真孔隙模型是根据孔喉网络结构通过光化学刻蚀的方法制作而成,可视性强;人造砂岩模型具有真实砂岩储层介质的条件,可重复使用;砂岩微观孔隙模型保留了砂岩的原始孔隙结构,也保存了大部分胶结物和填隙物,具有真实性。

Laboratory emulation study on micro remaining oil

With the emulational pore model, the artificial sandstone model and the sandstone microscopic pore model, a comprehensive emulated study is carried out for the distribution of micro remaining oil in laboratory. The paper firstly presents the merits of the models, and discusses micro mechanism of water displacing oil, and then summarizes the distribution patterns of micro remaining oil. At the same time, the distribution patterns of micro remaining oil after both active water flooding and polymer flooding were studied. The main advantage of the emulational pore model is its good visibility as it is made by photochemistry sculpture. The artificial sandstone model is reusable since it satisfies the conditions for a true sandstone reservoir. For the sandstone microscopic pore model, it keeps the original interstice structure of sandstone and most of the binding and interstitial material, thus it is authentic.