新型硫酸钡阻垢剂的研制及性能评价研究

发布时间：2018-03-03 11:53

  本文选题：硫酸钡垢　切入点：阻垢剂　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：结垢问题是油田生产中的难题,特别是硫酸盐结垢问题。如果不重视注水过程中的结垢,就会给以后的油田生产带来严重危害。目前主要采用化学阻垢法来抑制垢的生成,而加入阻垢剂种类主要分为有机磷系列和聚合物系列。但含有磷元素的阻垢剂排放到环境中会污染水质。随着人们对环境越来越重视,低磷、无磷阻垢剂的研制已经逐渐成为"绿色阻垢剂"研制的热点方向。本文选择衣康酸、丙烯酸、丙烯酸甲酯和2-丙烯酰胺基-2-甲基丙磺酸为原料,过硫酸铵为引发剂,研制出对硫酸钡阻垢效果最好的阻垢剂为GYDT。在引发剂加量为单体总质量的8%,反应时间为3h,反应温度为80℃,四种单体的配比为2:1:1:0.75时阻垢率最高可达86.21%。GYDT中含有的羧酸基团,酯基,醛基和磺酸基团,可以与金属离子发生络合作用而达到阻垢的目的。根据行业标准对GYDT的阻垢性能进行评价,结果表明:随温度的升高,阻垢率先增大后降低,在温度为85℃时阻垢率达到最大;当pH值为7.5时GYDT的阻垢效果最好;当阻垢剂浓度一定时,随Ba2+、SO42-浓度的升高,阻垢率呈降低趋势,当Ba2+浓度为800mg/L、S042-浓度为1000mg/L时阻垢效果最好;随矿化度的升高,GYDT对硫酸钡垢的阻垢率呈先增大而后缓慢降低的趋势。以姬塬油田姬九注与D202-32井水分析资料为基础数据,应用ScaleChem软件进行结垢理论预测研究,并结合实验研究,得到姬九注与D202-32井在混合比为5:5时结垢量最大,结垢总量为2219.3mg/L;姬九注与D202-32井以3:7混合时,结硫酸钡垢量最大。选取五种阻垢剂对姬塬油田进行应用评价,发现GYDT表现出稳定且良好的阻硫酸钡垢的能力,同时也可以对碳酸锶,硫酸锶,碳酸钙起到抑制作用,因此GYDT满足姬塬油田阻垢的需求。
[Abstract]:Scaling problem is a difficult problem in oilfield production, especially sulfate scaling problem. If we don't pay attention to scaling in water injection process, it will bring serious harm to oil field production in the future. At present, chemical scale inhibition method is mainly used to suppress scale formation. The kinds of scale inhibitors are mainly classified into organic phosphorus series and polymer series. However, scale inhibitors containing phosphorus can pollute water quality in the environment. As people pay more and more attention to the environment, low phosphorus, The development of non-phosphorous scale inhibitor has gradually become the focus of "green scale inhibitor". In this paper, itaconic acid, acrylic acid, methyl acrylate and 2-acrylamido-2-methylpropanesulfonic acid were selected as raw materials and ammonium persulfate as initiator. The best scale inhibitor for barium sulfate is GYDT.When the amount of initiator is 8% of the total mass of monomer, the reaction time is 3 h, the reaction temperature is 80 鈩，

本文编号：1560938