Abstract: Molecular aggregation state of saltresistance polymer was changed by intermolecular association, which transparently enhanced its property of saltresistance. However, molecular size was increased while the state of molecular aggregation was changed. Thus the question of worse adaptability between saltresistance polymer and reservoir came out. By means of instrument analysis, chemical analysis and modern physical simulation method, taking reservoir geology, fluids and polymersurfactant agent of Daqing as research platform, regarding polymersurfactant solution viscosity, molecular thread size and seepage characteristics as evaluation index, the research on the adjusting method and effect of the state of molecular aggregation of polymersurfactant agent was carried out. The results showed that βCD could restrain the association of polymersurfactant molecules, thus reduce the size of molecular aggregation of polymersurfactant agent. All this led to the wider range of the permeability that could be flowed through. There existed a best matching relationship between polymersurfactant/βCD and core heterogeneity. On this point, the effect of enlarging sweeping volume of polymersurfactant agent was optimal and recovery efficiency reached a climax. 

Key words: Daqing oilfield,    , Polymersurfactant,    , βCD,    ,  Degree of association,    , Adaptability evaluation

摘要： 抗盐聚合物通过分子间缔合作用来改变聚合物分子聚集态, 促使其抗盐性明显提高。但改变聚合物 分子聚集态也会增加分子线团尺寸, 带来抗盐聚合物溶液油藏适应性变差问题。利用仪器分析、 化学分析和现代物 理模拟方法, 以大庆油藏地质、 流体和聚表剂为实验平台, 以聚合物溶液黏度、 分子线团尺寸、 渗流特性和采收率等 为评价指标, 开展了聚表剂溶液分子聚集体调节方法及其效果实验研究。结果表明, β - 环糊精可以抑制聚表剂分子 间缔合程度, 减小聚表剂分子聚集体尺寸, 增加可进入储层渗透率范围。“ 聚表剂/ β - 环糊精” 体系与岩心非均质性存 在最佳匹配关系, 此时聚表剂溶液扩大波及体积效果达到最佳, 采收率增幅最大。

关键词: 大庆油田, 聚表剂, &beta, - 环糊精, 缔合程度, 适应性评价