摘要
针对酸化过程中,酸岩反应速度较快、穿透距离短、酸化有效期短等缺点,研制出一种新的酸化外加剂单体,用以提高酸化效果。该单体通过曼尼希反应合成而得,其最优合成条件为:单体配比甲醛:胺A:磷B为18.5:8:14(质量比),反应温度为90℃,反应时间为14h,阻聚剂对苯二酚加量为0.25%,产品转化率可达91%以上;通过红外光谱分析,证明该合成方案正确、可行;将外加剂单体和AMPS共聚,得到了一种新型的外加剂,其合成条件为:单体配比为24.2:4(单体:AMPS,质量比),单体浓度为40%,引发剂加量为2.0%,聚合时间1h,聚合温度为80℃。研究了缓速酸液体系溶蚀、二次伤害性能,结果表明该外加剂配制的缓速酸工作液具有优良的缓速效果、防二次伤害能力;岩心驱替实验进一步证实该缓速酸具有很好的缓速性能。
For the acidification process, the reaction velocity of acid rock was faster, and the penetration distance and acidification validity were short, a new acidizing additive monomer was developed to improve the acidizing effect. The monomer was synthesized through Manihi reaction, the optimum synthesis conditions was: Monomer ratio of formaldehyde:Amine A:Phosphorus B that is 18.5:8:14(the mass ratio), the reaction temperature was 90℃,reaction time was 14h, and polymerization inhibitor was increasing the amount of 0.25% for hydroquinone,in addition,the conversion rate of the monomer was high up to 91% or more. By infrared spectroscopy analysis, the results proved the synthesis scheme was correct and feasible. A new type of additive was obtained by the copolymerization of the monomer and AMPS, the synthesis conditions were the monomer ratio of 24.2:4(monomer:AMPS, mass ratio), monomer concentration was 40%,the initiating agent dosage was 2.0%,the polymerization time was 1h, the polymerization temperature was 80℃. At the same time, the chemical denudation and the secondary damage performance of the retarded acid system was studied, results showed that the retarded acid prepared by the acidizing additive monomer has good retarded effects and secondary damage prevention capacity, and core displacement experiments confirmed the retarded acid had good retarded performance.
出处
《钻采工艺》
CAS
北大核心
2013年第3期93-96,11,共4页
Drilling & Production Technology
基金
中国石化科技项目"压裂过程井下监测及评价"的科研成果
关键词
酸化
缓速酸
酸化外加剂
二次沉淀
采收率
acidification, retarded acid, acid additive, secondary precipitate, recovery ratio
