文章摘要
聚合物表面活性剂溶液微观驱油特征*
Microscopic Oil Displacement Characteristics of Polymeric Surfactant Solution
  
DOI:10.19346/j.cnki.1000-4092.2020.02.019
中文关键词: 聚合物  表面活性剂  微观驱油  残余油  驱油机理  岩心驱替  采收率
英文关键词: polymer  surfactant  microscopic oil displacement  residual oil  oil displacement mechanism  core displacement experiment  recovery factor
基金项目:“十三五”国家重大专项课题“低渗-致密油藏高效提高采收率技术”(项目编号2017ZX05009-004)。
作者单位
侯吉瑞1,2,3,陈宇光1,2,3,吴 璇1,2,3,方 舟1,2,3 (1. 中国石油大学(北京)非常规油气科学技术研究院北京 1022492. 中石油三次采油重点实验室低渗油田提高采收率应用基础理论研 究室北京 1022493. 石油工程教育部重点实验室北京 102249) 
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中文摘要:
      为从微观研究聚合物表面活性剂(简称聚表剂)的驱油机理和驱油效果,采用微观刻蚀仿真模型进行微观 可视化驱油实验,并与岩心驱替实验驱油效果对比。结果表明,在微观驱油实验中,水驱后微观模型中产生6种 类型残余油,而聚表剂驱后对盲端残余油的驱替效果不明显;聚表剂的驱油机理主要是通过其增黏作用、黏弹性 作用和乳化作用来扩大波及体积,降低渗流阻力,“拉”、“拽”残余油,将大油滴乳化分散成小油滴,从而将残余油有 效驱出;不同浓度的聚表剂在微观模型和岩心驱替实验中的驱油效果基本相符,聚表剂浓度越大,残余油启动能力 越高,驱油效果越好。聚表剂质量浓度为2000 mg/L时的驱油效果最好,采收率增幅为19.69%。图27表1参15
英文摘要:
      In order to microscopic study mechanism and oil recovery efficiency of oil displacement of polymeric surfactant,the micro-etching simulation model was used to carry out the oil displacement experiment,and the result was compared with that of core flooding experiment. The results showed that in the microscopic oil displacement experiment,six types of residual oil were produced in the model after water flooding. Flooding effect was not obvious that polymeric surfactant displaced residual oil at blind end. The mechanism of oil displacement of polymeric surfactant was viscosity-increasing effect,viscoelastic effect and emulsification,which could expand swept volume,reduce percolating resistance,and pull and squeeze residual oil to emulsify large oil droplets into small oil droplets,respectively. Therefore,the residual oil was effectively displaced. Comparing the microscopic model with the core flooding experiment,the oil recovery efficiency was basically consistent. When the concentration of polymeric surfactant was higher,the ability of displacing residual oil was stronger and the oil recovery was better. When the concentration of polymeric surfactant was 2000 mg/L,the oil recovery efficiency was the best and the enhanced oil recovery was 19.69%.
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