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日用化学工业（中英文）

日用化学工业 ›› 2016, Vol. 46 ›› Issue (11): 609-615.doi: 10.13218/j.cnki.csdc.2016.11.001

• 基础研究 •    下一篇

铁离子对水解聚丙烯酰胺溶液流变性能影响研究

陈斌1,敖文君1,陈士佳1,2,朱洪庆1,2,王成胜1,2,吴彬彬1,左清泉1   

  1. 1.中海油能源发展股份有限公司 工程技术分公司,天津 300452;
    2.海洋石油高效开发国家重点实验室,北京 100027
  • 出版日期:2016-11-22 发布日期:2019-04-18
  • 作者简介:陈斌(1984-),男,工程师,硕士,电话:15222582346,E-mail:chenbin8@cnooc.com.cn。
  • 基金资助:
    中国海洋石油总公司科研项目(CNOOC-KJ 125 ZDXM 06 LTD NFGC 2014-01)

Research work with respect to effects of iron ion on rheological performance of hydrolytic polyacrylamide solution

CHEN Bin1,AO Wen-jun1,CHEN Shi-jia1,2,ZHU Hong-qing1,2,WANG Cheng-sheng1,2,WU Bin-bin1,ZUO Qin-quan1   

  1. 1.CNOOC EnerTech-Drilling &Production Co.,Tianjin 300452,China;
    2.Key EOR Laboratory of CNOOC,Beijing 100027,China
  • Online:2016-11-22 Published:2019-04-18

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摘要： 针对还原性物质使驱油水解聚丙烯酰胺(HPAM)体系黏度损失严重的问题,利用室内物理模拟方法,定量和定性地分析了Fe2+和Fe3+对HPAM溶液零剪切黏度、动态黏弹性以及瞬时拉伸流变性能的影响,分析了2种铁离子影响HPAM溶液黏度的机理。结果表明:Fe2+主要通过氧化还原反应以及水解的化学行为使HPAM分子链断裂,溶液黏度、流变性能大幅降低,同时,溶液中Fe2+的存在,不仅会使HPAM溶液弹性模量和损耗模量都急剧下降,也使HPAM溶液拉丝直径变小,拉伸断裂时间缩短,最终使HPAM分子与分子间的链缠结机会减小,缠结程度减弱,分子变得易于流动。Fe3+对HPAM溶液流变性能影响较小,其主要作用是使HPAM絮凝并沉淀。

关键词: 水解聚丙烯酰胺, 黏度, 黏弹性, 流变性

Abstract: Considering the problem that reducing substances cause serious viscosity loss of hydrolytic polyacrylamide (HPAM) solution used as oil displacement agent in crude oil field,the effects of Fe2+ and Fe3+ on the zero shear viscosity,dynamic viscoelasticity and rheological performance under instant extension were qualitatively and quantitatively analyzed with laboratory physical simulation method;then the mechanism for the effect of two kinds of iron ion on the viscosity of HPAM solution was examined.Results showed that the presence of Fe2+ in the solution mainly causes the break of the molecular chain of HPAM via redox reaction and chemical behavior of hydrolysis,which results in significant decline of viscosity and rheological performance of the HPAM solution.Meanwhile,the presence of Fe2+ in the HPAM solution not only causes the elastic modulus and loss modulus both fall sharply;but also reduces the filament diameter of HPAM solution and accelerates the break of the filament.Finally,degree of entanglement between polymer molecules reduces,and the molecules become easy to flow.Effect of Fe3+ on the rheological performance of HPAM solution is rather small,and its main functions are flocculation and precipitation of HPAM.

Key words: hydrolytic polyacrylamide, viscosity, viscoelasticity, rheological performance

中图分类号: 

  • TE357.46