石油学报 ›› 2006, Vol. 27 ›› Issue (1): 85-88.DOI: 10.7623/syxb200601018

• 油田开发 • 上一篇    下一篇

疏水缔合聚合物溶液粘弹性及流变性研究

曹宝格1, 罗平亚1, 李华斌1, 张勇2   

  1. 1. 西南石油大学油气藏地质及开发工程国家重点实验室 四川成都 610500;
    2. 辽河石油勘探局 辽河盘锦 124125
  • 收稿日期:2004-12-15 修回日期:2005-02-28 出版日期:2006-01-25 发布日期:2010-05-21
  • 作者简介:曹宝格,女,1975年12月生,2000年毕业于西南石油学院石油工程专业,2003年获西南石油学院油气田开发工程硕士学位,现为西南石油大学油气田开发专业2003级在读博士研究生.E-mail:caobage1045@163.com
  • 基金资助:
    国家高技术研究发展计划(863)项目(2001AA602014-3)"海上注聚提高采收率及配套技术"部分成果.

Viscoelasticity and rheological behaviors of hydrophobic association polymer solution

Cao Baoge1, Luo Pingya1, Li Huabin1, Zhang Yong2   

  1. 1. State Key Laboratory for Oil and Gas Reservoir Geology and Exploitation, Southwest petroleum Institute, Chengdu 610500, China;
    2. Liaohe Petroleum Exploration Bureau, Panjin 124125, China
  • Received:2004-12-15 Revised:2005-02-28 Online:2006-01-25 Published:2010-05-21

摘要: 实验测定了缔合聚合物溶液的动态粘弹性、流变性以及在多孔介质中的流变特性.动态粘弹性实验结果表明,在聚合物溶液浓度大于临界缔合浓度时,溶液的弹性模数G'和耗能模数G″明显大于聚合物溶液浓度低于临界缔合浓度时的G'和G″,且存在着一个临界聚合物浓度.低于该浓度时,溶液的G″大于G',而高于该浓度时, G'大于G″,不同浓度下的G″和G'基本不受剪切应力的影响.在实验剪切速率内,缔合聚合物溶液的宏观流变特征表现为剪切稀释性和剪切增稠性.而在多孔介质中,在低剪切速率下,溶液表现出牛顿流体的特征;随着剪切速率的增加,溶液表现出剪切稀释性和剪切增稠性的流变规律.在进行缔合聚合物驱油时,应尽可能使用弹性比较大的聚合物,而且注入速度须高于临界粘弹流速,这样才能充分利用其粘弹性提高采收率.

关键词: 疏水缔合聚合物, 流变性, 粘弹性, 弹性模数, 损耗模数, 实验研究

Abstract: The dynamic viscoelasticity and normal rheological behavior of hydrophobic association polymer solution(HAPS) as well as the rheological behavior of HAPS in porous media were measured.The experimental results of dynamic viscoelasticity of HAPS indicate that the loss modulus (G″) and elastic modulus (G') of association polymer solution are higher when the concentration of association polymer(AP) is higher than the critical association concentration.The G″ is larger than the G' when concentration of AP is lower than the critical association concentration,and the G″ is smaller than the G' when the concentration of AP is higher than the critical association concentration.The G″ and G' are free from shear stress in the different concentration of HAPS.Under the experimental shear rate,the macroscopical rheological behaviors of HAPS show shear thinning and shear thickening.In porous media,the rheological behavior of HAPS shows the properties of Newton fluid under the low-speed shear.The shear thinning and shear thickening behaviors could be observed when increasing shear rate.The polymer with a bigger elasticity should be used,and its injecting rate should be higher than the critical viscoelastic flow rate when using hydrophobic association polymer in polymer flooding.In this way,the viscoelasticity of hydrophobic association polymer can be fully utilized to enhance oil recovery.

Key words: hydrophobic association polymer, rheological behavior, viscoelasticity, elastic modulus, loss modulus, experimental study

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