不同分子量聚合物驱相对渗透率曲线对比研究  

Comparing Research on the Relative Permeability Curve in Condition of Different Molecular Weight in Polymer Flooding

作　　者：李斌会[1] 杨清彦[1] 贾忠伟[1] 徐联玉[1] 王晓芳[2] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]大庆油田有限责任公司第一采油厂,黑龙江大庆163111

出　　处：《内蒙古石油化工》2007年第5期192-195,共4页Inner Mongolia Petrochemical Industry

基　　金：大庆油田公司科技攻关项目"聚合物驱相对渗透率曲线测定方法及应用研究"部分成果(编号20060612)

摘　　要：聚合物驱相对渗透率曲线是描述多孔介质中多相渗流动态及油田聚驱开发指标计算和预测的重要基础资料,而增大聚合物的相对分子量是提高采出程度的重要措施之一。本文选取五种不同分子量的聚合物,通过大量岩心实验,利用非稳态法测定了不同分子量分别在相同浓度和相同粘度条件下的聚合物驱相对渗透率曲线。结果表明,随着聚合物分子量的增加,在相同含水饱和度下聚合物相的相对渗透率逐渐降低;油水两相跨度逐渐增大;曲线的右端点和等渗点都随着分子量的增大向右偏移,说明增加聚合物溶液的粘弹性确实可以提高岩心内部的微观驱油效率。文中还首次给出了聚合物驱残余油饱和度与聚合物分子量之间的数学关系式,为不同分子量聚合物驱数值模拟研究过程中数学模型的完善提供了理论基础。The relative permeability curve in polymer flooding is the important basis to describe multiphase flow behavior in porous medium and to forecast development indicators. Increasing relative molecular weight is one of the important methods in enhancing recovery percent. To choose five kinds of polymer with different molecular weight and do mass of experiments in cores, we achieve the relative permeability curve in condition of the same concentration and the same viscosity departure by methods of unsteady state. The results show that with the polymer molecular weight increasing, the relative permeability decreases and oil water span increasing at the same water saturation. At the same time, the right end point and equal-permeability point on the curve are both moving to the right, which can surely enhance micro efficiency of oil displacement of the inner core by improving the viscoelasticity of polymer solution. Moreover, we supply theory basis for consummating mathematical model in researching numerical simulation of different molecular weight by showing the relations between residual oil saturation and molecular weight in polymer flooding firstly.

关 键 词：分子量 聚合物驱 相对渗透率曲线 非稳态法 残余油饱和度 数值模拟 

分 类 号：TQ317.5[化学工程—高聚物工业]