本文關(guān)鍵詞： 稠化酸 三元共聚物 疏水締合 酸液稠化劑 微觀分析 性能評(píng)價(jià)　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在深井超深井油氣儲(chǔ)層進(jìn)行酸化時(shí),為達(dá)到深部酸化的目的通過添加高增黏能力的稠化劑使稠化酸性能提升。本文設(shè)計(jì)先合成了三種不同疏水碳鏈的單體:二甲基十四烷基(2-丙烯酰胺基丙基)溴化銨(DTAB)、二甲基十六烷基(2-丙烯酰胺基丙基)溴化銨(DHAB)和二甲基十八烷基(2-丙烯酰胺基丙基)溴化銨(DOAB)。再以丙烯酰氧乙基三甲基氯化銨(DMC)、二甲基二烯丙基氯化銨(DMDAAC)分別與三種疏水單體為聚合單體進(jìn)行水溶液自由基聚合,合成出三元共聚物分別為PDDT-14、PDDH-16和PDDO-18。采用二甲氨基丙基丙烯酰胺(DMAPAA)分別和溴代十四烷、溴代十六烷、溴代十八烷反應(yīng)生成三種不同疏水烷基鏈單體。以反應(yīng)產(chǎn)率為依據(jù),通過單因素實(shí)驗(yàn)確定單體合成的優(yōu)化條件:以丙酮為溶劑,溶質(zhì):溶劑=1:1.5(質(zhì)量比),反應(yīng)溫度55℃,反應(yīng)時(shí)間40.0h,n(DMAPAA):n(溴代烷)=1.0:1.1。通過傅里葉紅外光譜、核磁氫譜分析對(duì)三種疏水單體進(jìn)行了結(jié)構(gòu)表征。以表觀黏度為依據(jù)通過單因素實(shí)驗(yàn)確定締合聚合物優(yōu)化條件:疏水單體加量在0.25%～0.3%、單體濃度55%、引發(fā)劑加量0.06%、體系PH=5、反應(yīng)溫度60℃、反應(yīng)時(shí)間6h、螯合劑EDTA加量0.015%。通過傅里葉紅外光譜、核磁氫譜對(duì)三種疏水締合聚合物進(jìn)行結(jié)構(gòu)表征。按照行業(yè)標(biāo)準(zhǔn)的酸液稠化劑評(píng)價(jià)方法測(cè)試。通過實(shí)驗(yàn)表明稠化劑PDDH-16與進(jìn)行同步研究的PDDT-14和PDDO-18相比較,在酸液中PDDH-16稠化劑的酸溶性、緩速性、抗溫和抗剪切性能較好。并且通過對(duì)PDDH-16聚合物水溶液的黏濃關(guān)系、熒光光譜及掃描電鏡(SEM)分析,證明了本文合成的陽離子締合聚合物在溶液中可以發(fā)生疏水締合作用產(chǎn)生分子間締合并且形成空間網(wǎng)絡(luò)結(jié)構(gòu)達(dá)到增黏效果。稠化酸PDDH-16與多種酸液添加劑的配伍性良好,并確定稠化酸體系配方:20%鹽酸+0.8%稠化劑PDDH-16+2%緩蝕劑WD-11+1.0%鐵離子穩(wěn)定劑WD-8A+0.5%助排劑WD-12A+1.0%黏土穩(wěn)定劑WD-5。稠化酸體系具有較好的緩蝕效果,其腐蝕速率為13.98 g/(m2·h),緩蝕率達(dá)到98.34%。且酸化后殘酸的表面張力達(dá)到27.60mN/m能夠滿足返排要求,其殘酸黏度只有10.80 mPa·s有利于固體懸浮物的返排。
[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，

本文編號(hào)：1508501