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采用核磁共振成像技术，在接近实际地层条件的三层非均质物理模型中，可视化地研究了不同大小聚合物段塞的驱油过程，获得了聚合物段塞运动的三维核磁共振图像，同时还研究了聚合物注入前后孔隙利用系数的三维变化情况。结果表明：聚合物段塞注入过程中，高渗层的采出程度得到进一步提高，注入一定体积的聚合物溶液后，中、低渗层才开始见效；聚合物段塞注入后的继续注水过程中，低渗层的采出程度有大幅度提高，同时，高、中渗透层也有所提高；三维核磁共振成像还表明，聚合物溶液注入后，模型孔隙利用系数明显提高，孔隙利用系数提高的幅度与孔隙注入端之间的距离有关；在非均质模型中，聚合物溶液能改善水油流度比，提高油层内部水驱微观波及系数和宏观波及系数从而提高驱油效果。
In the three-layer inhomogeneous physical model close to the actual formation conditions, nuclear magnetic resonance imaging technology was used to visualize the oil displacement process of polymer slugs of different sizes. The 3D nuclear magnetic resonance images of polymer slugs were obtained, meanwhile, The three-dimensional changes in pore utilization factor before and after polymer injection were also studied. The results show that during the process of polymer slug injection, the production level of high permeability layer is further improved. After a certain volume of polymer solution is injected, the middle and low permeability layer begin to work effectively. The continuous water injection process after polymer slug injection Middle and low permeable layers have greatly increased the degree of production, while the high and medium permeability layer also increased; three-dimensional nuclear magnetic resonance imaging also shows that the polymer solution injection, the model pore utilization factor was significantly increased pore utilization factor In the heterogeneous model, the polymer solution can improve the water-oil mobility ratio and improve the micro-wave and coefficient of water flooding in the reservoir to improve the flooding effect.