| 水解聚丙烯酰胺/胞外多糖复合体系的流变性 |
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| 引用本文： | 田玉芹,钱钦,李海平,陈雷,郭宏伟,辛爱渊,侯万国.水解聚丙烯酰胺/胞外多糖复合体系的流变性[J].油田化学,2021,38(1):129-136. |
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| 作者姓名： | 田玉芹 钱钦 李海平 陈雷 郭宏伟 辛爱渊 侯万国 |
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| 作者单位： | （1. 中国石油化工股份有限公司胜利油田分公司石油工程技术研究院，山东东营257000；2. 山东大学国家胶体材料工程技术研究中
心，山东济南250100；3. 山东大学胶体与界面化学教育部重点实验室，山东济南250100） |
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| 基金项目： | 国家“十三五”重大专项课题“致密油气开发环境保护技术集成及关键装备”（项目编号2016ZX05040-005）和中石化重点科技
攻关项目“油田开发废液废固资源化利用技术与装备研制”（项目编号P18048-2）。 |
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| 摘 要： | 为探究聚合物驱油体系中柔性、刚性大分子间的相互作用,详细研究了部分水解聚丙烯酰胺(HPAM,柔性分子)和深海中温菌Wangia profunda SM-A87分泌的阴离子胞外多糖(EPS,刚性分子)复合体系的流变性。研究结果表明,HPAM和EPS在亚浓溶液区的氢键复合具有降黏效应,这在氢键复合物体系中鲜见报道。随溶液中电解质浓度和剪切速率增加,HPAM和EPS的复配降黏效应可转变为复配增黏效应。当溶液pH<5或>11时,HPAM和EPS也可复配增黏。HPAM和EPS的复配增黏或降黏取决于复合溶液中的分子构型,而分子构型受溶液pH、电解质浓度和剪切速率的影响。与HPAM体系相比,HPAM/EPS复合体系具有更强的抗盐性,表明其在三次采油领域具应用潜力。本文可为柔性/刚性阴离子高分子复合体系研究提供理论指导。
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| 关 键 词： | 多糖 黏度 聚丙烯酰胺 相互作用 流变 |
Rheological Properties of Hydrolyzed Polyacrylamide/Exopolysaccharide Complex System |
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| TIAN Yuqin,QIAN Qin,LI Haiping,CHEN Lei,GUO Hongwei,XIN Aiyuan,HOUWanguo.Rheological Properties of Hydrolyzed Polyacrylamide/Exopolysaccharide Complex System[J].Oilfield Chemistry,2021,38(1):129-136. |
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| Authors: | TIAN Yuqin QIAN Qin LI Haiping CHEN Lei GUO Hongwei XIN Aiyuan HOUWanguo |
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| Affiliation: | (Petroleum Engineering Technology Research Institute,Shengli Oilfield Branch,Sinopec,Dongying,Shandong 257000,P R of China;National Engineering Research Center for Colloidal Materials,Shandong University,Jinan,Shandong 250100,P R of China;Key Laboratory of Colloid and Interface Chemistry(Ministry of Education),Shandong University,Jinan,Shandong 250100,P R of China) |
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| Abstract: | To probe the interactions between flexible and rigid macromolecules in polymer flooding systems,the rheological properties of mixed solutions containing flexible partially hydrolyzed polyacrylamide(HPAM)and a rigid anionic exopolysaccharide(EPS)secreted by a deep-sea mesophilic bacterium Wangia profunda SM-A87 were studied in detail.Results showed that mixing of HPAM and EPS leaded to a viscosity decrease of their mixed solutions in the semidilute regime,which was rarely seen in hydrogen-bonded complex systems.With increasing electrolyte concentrations and shear rates,the viscosity decrease of HPAM/EPS solutions could turn into the viscosity increase.The viscosity increase of HPAM/EPS solutions was also observed when tuning the solution pH to be<5 or>11.The viscosity decrease or increase of the HPAM/EPS solutions resulted from variation of the molecular configuration that could be influenced by electrolyte concentrations,pH,and shear rates.Compared with the HPAM system,the HPAM/EPS complex system exhibited stronger salt resistance and thus great potential for application in tertiary oil recovery.This work can direct research on other similar systems composed of flexible and rigid anionic macromolecules. |
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| Keywords: | polysaccharide viscosity polyacrylamide interaction rheology |
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