阳离子缔合聚合物酸液稠化剂合成研究

发布时间：2018-02-13 15:36

  本文关键词： 稠化酸 三元共聚物 疏水缔合 酸液稠化剂 微观分析 性能评价　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：在深井超深井油气储层进行酸化时,为达到深部酸化的目的通过添加高增黏能力的稠化剂使稠化酸性能提升。本文设计先合成了三种不同疏水碳链的单体:二甲基十四烷基(2-丙烯酰胺基丙基)溴化铵(DTAB)、二甲基十六烷基(2-丙烯酰胺基丙基)溴化铵(DHAB)和二甲基十八烷基(2-丙烯酰胺基丙基)溴化铵(DOAB)。再以丙烯酰氧乙基三甲基氯化铵(DMC)、二甲基二烯丙基氯化铵(DMDAAC)分别与三种疏水单体为聚合单体进行水溶液自由基聚合,合成出三元共聚物分别为PDDT-14、PDDH-16和PDDO-18。采用二甲氨基丙基丙烯酰胺(DMAPAA)分别和溴代十四烷、溴代十六烷、溴代十八烷反应生成三种不同疏水烷基链单体。以反应产率为依据,通过单因素实验确定单体合成的优化条件:以丙酮为溶剂,溶质:溶剂=1:1.5(质量比),反应温度55℃,反应时间40.0h,n(DMAPAA):n(溴代烷)=1.0:1.1。通过傅里叶红外光谱、核磁氢谱分析对三种疏水单体进行了结构表征。以表观黏度为依据通过单因素实验确定缔合聚合物优化条件:疏水单体加量在0.25%～0.3%、单体浓度55%、引发剂加量0.06%、体系PH=5、反应温度60℃、反应时间6h、螯合剂EDTA加量0.015%。通过傅里叶红外光谱、核磁氢谱对三种疏水缔合聚合物进行结构表征。按照行业标准的酸液稠化剂评价方法测试。通过实验表明稠化剂PDDH-16与进行同步研究的PDDT-14和PDDO-18相比较,在酸液中PDDH-16稠化剂的酸溶性、缓速性、抗温和抗剪切性能较好。并且通过对PDDH-16聚合物水溶液的黏浓关系、荧光光谱及扫描电镜(SEM)分析,证明了本文合成的阳离子缔合聚合物在溶液中可以发生疏水缔合作用产生分子间缔合并且形成空间网络结构达到增黏效果。稠化酸PDDH-16与多种酸液添加剂的配伍性良好,并确定稠化酸体系配方:20%盐酸+0.8%稠化剂PDDH-16+2%缓蚀剂WD-11+1.0%铁离子稳定剂WD-8A+0.5%助排剂WD-12A+1.0%黏土稳定剂WD-5。稠化酸体系具有较好的缓蚀效果,其腐蚀速率为13.98 g/(m2·h),缓蚀率达到98.34%。且酸化后残酸的表面张力达到27.60mN/m能够满足返排要求,其残酸黏度只有10.80 mPa·s有利于固体悬浮物的返排。
[Abstract]:During acidification of deep and ultra-deep oil and gas reservoirs, In order to achieve the purpose of deep acidification, thickening acid properties were improved by adding a thickener with high viscosity increasing ability. In this paper, three different hydrophobic carbon chain monomers: dimethyl 14 alkyl and 2-acrylamide propyl) bromination were designed and synthesized. DTABX, DHA, DHA) and dimethyl 18 alkyl 2-acrylamide propyl) ammonium bromide (DOABN). Then DMCU, DMDAAC) were separated by acryloxyethyl trimethylammonium chloride (DMC) and dimethyldiallylammonium chloride (DMDAAC), which were divided into two groups: dimethyl diallyl ammonium chloride (DMDAAC) and dimethyl diallyl ammonium chloride (DMDAAC). Do not engage in free radical polymerization of aqueous solution with three hydrophobic monomers. Three kinds of hydrophobic alkyl chain monomers were synthesized by the reaction of dimethylaminopropyl acrylamide (DMAP), bromohexadecane, brominohexadecane and brominoalkyl alkyl chain, respectively, in the presence of PDDT-14, PDDH-16 and PDDO-18.The reaction yield is based on the yield. The optimum conditions of monomer synthesis were determined by single factor experiment: acetone as solvent, solute: solvent 1: 1.5 (mass ratio, reaction temperature 55 鈩，

本文编号：1508501