【作者】 吴文祥； 张向宇；

【Author】 WU Wen-xiang,ZHANG Xiang-yu(Key Laboratory of Education Ministry for Oil and Gas Recovery Factor Enhancing,Daqing Petroleum Institute,Daqing 163318,Heilongjiang,China)

【机构】 大庆石油学院提高油气采收率教育部重点实验室；

【摘要】 通过岩心流动实验,探讨了部分水解聚丙烯酰胺溶液(HPAM)在多孔介质中流动时聚合物分子量和孔隙特征参数对流动行为的影响,得到了一组反映流动参数变化规律的关系曲线。结果表明,在消除黏度效应条件下,高分子量聚合物比低分子量聚合物降低水相渗透率的能力强;聚合物分子量越高,多孔介质渗透率越低,阻力系数和残余阻力系数越大,聚合物越早突破多孔介质;当平均孔隙半径与聚合物分子尺寸之比大于4时,多孔介质的孔隙通道一般不会发生聚合物堵塞。更多还原

【Abstract】 The effects of the molecular mass of partially hydrolyzed polyacrylamide and the characteristic dimension of the pores in porous medium on the flow performance of the partially hydrolyzed polyacrylamide solution in the porous medium are discussed by core flow experiments,and a set of parameter vary law curves are obtained.It is shown that under the condition of eliminating viscosity effect,high molecular polymer can more effectively decrease the permeability of water phase than low molecular polymer;the higher the molecular mass of polymer and the lower the permeability of the porous medium,the greater the flow resistance factor and residual resistance factor and the earlier the polymer solution breaks through the porous medium;when the ratio of the average radius of the pores in the porous medium to the gyration radius of the polymer molecules is greater than 5,the pore tunnel of the porous medium will not generally be plugged by the polymer.更多还原