甜菜碱型两亲聚合物的研制及其盐增黏特性  

Synthesis of betaine amphiphilic polymer and its salt thickening properties

作　　者：杨红斌 吕志琦[1,2] 徐喆 SARSENBEKULY Bauyrzhan 赵健 李淼[4] 朱洲 李哲 康万利[1,2] YANG Hongbin;Lü Zhiqi;XU Zhe;SARSENBEKULY Bauyrzhan;ZHAO Jian;LI Miao;ZHU Zhou;LI Zhe;KANG Wanli(Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)),Ministry of Education,Qingdao 266580,China;School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China;Production Optimization Department,China Oilfield Services Limited,Tianjin 300459,China;Qingdao Huizhi Oilfield Service Company Limited,Qingdao 266580,China)

机构地区：[1]非常规油气开发教育部重点实验室(中国石油大学(华东)),山东青岛266580 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中海油田服务股份有限公司油田生产事业部,天津300459 [4]青岛汇智石油科技有限公司,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2022年第6期149-155,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(52104055,52130401,52250410349);山东省自然科学基金项目(ZR2021ME171)。

摘　　要：针对驱油用两亲聚合物在高矿化度油藏适应性差的问题,利用无皂自由基聚合法优化合成一种驱油用的新型甜菜碱型盐增黏两亲聚合物PADC。利用红外光谱仪、核磁仪、元素分析仪对研发的甜菜碱型两亲聚合物进行表征,借助旋转黏度计、扫描电镜、动态光散射仪研究甜菜碱型两亲聚合物的微观形貌特征及盐增黏行为。结果表明:甜菜碱基团的引入使两亲聚合物在水溶液中具有明显的“反聚电解质”效应,盐离子可通过增大流体力学半径和增强疏水缔合的双重作用使PADC具有盐增黏特性;当NaCl质量浓度从0增大到15×10^(4) mg/L时,PADC溶液的表观黏度从14.1增大到54.3 mPa·s,流体力学半径从857增大到1242 nm,盐离子强度越大,盐增黏效果越明显。In order to solve the problem of poor adaptability of amphiphilic polymer for oil displacement in high salinity reservoirs,a novel betaine amphiphilic polymer(PADC)for oil displacement was synthesized by soap-free radical polymerization.The PADC was characterized by means of FT-IR,NMR and element analyzer.The micro-morphology and salt thickening of PADC was investigated by rotational viscometer,scanning electron microscope and dynamic light scatter meter.The results show that the introduction of betaine groups makes amphiphilic polymer have“reverse polyelectrolyte”effect in aqueous solution.Salt ions can make PADC have salt thickening properties by increasing hydrodynamic radius and enhance hydrophobic association.When NaCl concentration increases from 0 to 15×10^(4) mg/L,the apparent viscosity of PADC solution increases from 14.1 to 54.3 mPa·s,and the hydrodynamic radius increases from 857 to 1242 nm.The greater the salt ionic strength,the more obvious the effect of salt thickening.

关 键 词：两亲聚合物 甜菜碱单体 盐增黏 流体力学半径 疏水缔合 

分 类 号：TE357[石油与天然气工程—油气田开发工程]