渤海某油田聚驱后微观剩余油分布规律研究

通过制作微观仿真可视化模型,并进行微观模型驱油实验,利用图像采集系统将驱替过程的图像转化为计算机的数值信号,分析出高、中、低三种渗透率储层中剩余油分布规律,并探讨聚合物驱驱替及运移的机理。实验结果表明,高渗模型水驱和聚驱结束后,剩余油均以簇状和柱状为主;中渗层模型水驱和聚驱结束后剩余油也以簇状和柱状为主,但并没有高渗层驱替的效果好,低渗层模型水驱后,剩余油以水驱未波及的连片状剩余油和簇状剩余油为主,聚驱后剩余油变化量不大。

STUDY ON THE DISTRIBUTION OF MICRO REMAINING OIL AFTER POLYMER FLOODING IN BOHAI OILFIELD

Through making the microscopic simulation visualization model and carrying out the microscopic oil displacement experiment,the image of displacement process is transformed into the numerical signal of computer by using the image acquisition system.The similarities and differences of the remaining oil distribution in the high,medium and low permeability reservoirs are analyzed,and the mechanism of polymer displacement and mi?gration is discussed.The experimental results show that the remaining oil in the high permeability layer is mainly clustered and columnar after water flooding and polymer flooding.After water flooding and polymer flooding,the remaining oil in the medium permeability layer is mainly clustered and columnar,but it is not as effective as that in the high permeable layer.After water flooding,the remaining oil in the low permeability layer is mainly in the form of continuous and cluster,and the change of remaining oil after polymer flooding is small.