聚合物驱后微观剩余油分布的网络模型模拟

利用网络模型研究了储层特性（孔隙半径、连通性、均质性和润湿性）对聚合物驱后剩余油含量及微观分布形态的影响。在模型中考虑了聚合物的非线性粘性、吸附和捕集等特性。将微观剩余油分为孤立状、条带状和网络状3种不同的分布形态。模拟结果表明，随着孔隙半径的增大，孤立状剩余油增多，网络状剩余油减少。随着连通性的增强，孤立状剩余油增多，其他两种形式剩余油变化趋势复杂多样。储层均质性对孤立状和网络状剩余油的影响均比较明显。在3种影响因素下，网络状剩余油所占比例明显大于孤立状和条带状。随着储层润湿性的增强，剩余油饱和度降低的速度减慢。

Network model modeling of microcosmic remaining oil distribution after polymer flooding

Using network model,the effects of the pore radius,connection,homogeneity and wettability on the content and the distribution of the microcosmic remaining oil were studied.In the modeling,the features of polymer's non-linear viscosity,absorption and trap were considered.The microcosmic remaining oil was divided into three types that are isolated remaining oil,strip remaining oil and network remaining oil.The results indicate that with the increasing of the pore size,isolated remaining oil increases and network remaining oil reduces.With the increasing of the connection,isolated remaining oil increases while the changing trend of the other two types is varying.The homogeneity of the reservoir has great influence on the isolated and network remaining oil.In three factors,the proportion of network remaining oil is more than the other two kinds remaining oil.With the increasing of the wettability of the reservoir,the remaining oil saturation decreases slowly.