疏水缔合聚合物传输运移能力及其作用机理

发布时间：2019-07-12 08:49

【摘要】：针对疏水缔合聚合物分子线团尺寸与油藏多孔介质孔隙尺寸的配伍性差的问题,以β-环糊精(β-CD)为疏水缔合聚合物缔合程度的调节剂,以大庆典型聚驱区块储层地质和流体为实验平台,以注入压力、表观黏度、质量浓度、黏均相对分子质量为评价指标,研究了疏水缔合聚合物传输运移能力并分析了作用机理。实验结果表明,聚合物溶液在多孔介质内的传输运移能力较差且主要滞留在岩心前部区域。β-CD可以改善聚合物溶液的传输运移能力,有利于聚合物在多孔介质内均匀分布。随着β-CD含量的增加,聚合物溶液分子链间的缔合作用减弱,分子线团尺寸减小,聚合物溶液的传输运移能力增强。
[Abstract]:In order to solve the problem of poor compatibility between hydrophobic association polymer molecular cluster size and pore size of reservoir porous media, 尾-cyclodextrin (尾-CD) was used as regulator of hydrophobic association polymer association degree, reservoir geology and fluid of Daqing typical polymer flooding block as experimental platform, injection pressure, apparent viscosity, mass concentration and viscosity relative molecular weight as evaluation indexes. The transport and transport capacity of hydrophobic association polymers was studied and the mechanism of action was analyzed. The experimental results show that the transport and migration ability of polymer solution in porous media is poor and mainly stranded in the front of core. 尾-CD can improve the transport capacity of polymer solution and is beneficial to the uniform distribution of polymer in porous media. With the increase of 尾-CD content, the association between molecular chains of polymer solution is weakened, the size of molecular linear cluster decreases, and the transport and transport ability of polymer solution is enhanced.
【作者单位】：东北石油大学提高油气采收率教育部重点实验室;
【基金】：国家自然科学基金面上项目“抗盐型聚合物油藏适应性及其改进方法基础研究”(51574086) 国家“十三五”科技重大专项子课题(2016ZX05058-003-010)经费资助
【分类号】：TE39

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