非均质条件下聚表二元驱可视化物理模拟研究

Research on Oil Displacement of Polymer/Surfactant Flooding for Visible Model under the Heterogeneous Condition

为了能够更好地认识平面非均质油藏的油水流动动态及二元体系(聚合物/表面活性剂)在非均质油藏中的应用,采用可视化物理模拟方法直观研究了平面非均质油藏的注水驱油机理。向水驱之后的模拟油层注入二元体系,通过观察模型中二元驱体系流动情况来分析注入二元体系后不同段塞在模拟油层的情况。实验证明二元体系可以有效地提高油层采收率和波及系数。

In order to realize oil-water flow sitnation and the application of binary system （surfactant/polymer） in the heterogeneous reservoir, visible physical simulation is used to study directly the oil displacement mechanism and efficiency. Under the influence of heterogeneous reservoir, oil-water distributing character and oil displacement under different time are observed directly. The condition of oil displacement in the actual reservoir are observed di- rectly. The recovery efficiency has been effectively enhanced by injecting binary system. The different sections un- der the ground after injecting binary system can be analyzed by observing the flow of binary system in the visible model. Comparison between the efficiency before injecting binary system and the efficiency after injecting binary system, the efficiency of enhancing the oil recovery ratio and sweep efficiency by binary system has been proved.