实验室进行了三种不同分子量聚合物溶液在多孔介质中的蠕变回复实验 ,多孔介质采用的是三种不同结构的微观模型 ,即 :毛细管模型、网格模型和天然模型。通过对模型实验数据的拟合 ,确定了聚合物溶液的松弛时间 ,并根据松弛时间大小和流量变化率 ,评价了不同分子量聚合物溶液的粘弹性行为 ;还采用人造岩芯研究了聚合物溶液在多孔介质中的蠕变回复[1] 与驱油效率的关系。结果表明 ,聚合物分子量越大 ,松弛时间越长 ,且蠕变回复过程中流量变化率与聚合物分子量有关 ,同时 ,通过聚合物溶液的蠕变回复可以提高驱油效率 Three different molecular weight polymer solution creep recovery experiments in porous media were carried out in the laboratory. Three different microstructures were used in porous media, namely, capillary model, mesh model and natural model. By fitting the experimental data of the model, the relaxation time of the polymer solution was determined, and the viscoelastic behavior of the polymer solutions with different molecular weights was evaluated according to the relaxation time and the rate of change of the flow rate. The artificial solution was also used to study the polymer solution Creep recovery in porous media [1] and the relationship between displacement efficiency. The results show that the larger the molecular weight of the polymer, the longer the relaxation time, and the rate of change of the flow rate during creep recovery is related to the molecular weight of the polymer. Meanwhile, the creep recovery of the polymer solution can improve the displacement efficiency