抑制型抗高温降滤失剂的合成与性能研究

发布时间：2018-03-21 15:53

  本文选题：抗温耐盐　切入点：降滤失剂　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着对油气资源的勘探开发不断向深部地层发展,作为水基钻井液体系关键组成部分的处理剂面临着高温与盐钙侵入的严峻考验,研制开发抗温耐盐、钙且同时具备抑制性和降滤失性能的水基钻井液处理剂,成为我国油田化学领域的新课题。本文依据分子结构设计理论,结合现有抗温耐盐处理剂的结构特点,选择2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酸(AA)和丙烯酰胺(AM)为反应单体,以过硫酸钾为引发剂,纯水为反应溶剂,通过自由基共聚,合成了两性离子共聚物降滤失剂AMPS/AM/AA。通过考察不同合成条件下的产物抑制性、流变性以及降滤失性能的变化,优化了反应体系的反应条件:引发剂用量、单体总浓度、单体配比、反应温度、反应时间等,确定了制备抑制型抗高温降滤失剂AMPS/AM/AA的最优合成条件。通过红外光谱分析(FTIR)、热重分析(TGA)等方法对聚合物AMPS/AM/AA进行了表征分析,结果表明聚合物中含有主要特征官能团,且分子量大小适中,产物具有良好的热稳定性能,可抗330℃高温。通过流变和滤失实验,对AMPS/AM/AA性能进行了评价,结果表明,当聚合物AMPS/AM/AA加量1%时,基浆的滤失量从未入前的27.6 mL降至3.2 mL且流变性得到改善,在此加量下的复合盐水基浆体系(其中NaCl加量为5%、CaCl2加量为0.8%),经220℃高温老化16 h后依旧可维持较低滤失量,证明AMPS/AM/AA具备优异的抗温抗盐钙降滤失性能,与TZGJ-1和GT-888的对比试验亦证明了这一点。通过对高温高压下水泥浆滤失量的测定,表明聚合物AMPS/AM/AA在30 min内未发生击穿现象且转化后的滤失量不超过50 mL。借助激光粒度分布仪对聚合物AMPS/AM/AA的作用机理做了简单分析研究,研究表明,降滤失剂AMPS/AM/AA的加入增强了黏土颗粒的水化分散能力,形成对微细颗粒的护胶作用进而阻止其碰撞聚结,有利于体系通过颗粒间的紧密堆积形成致密滤饼,从而实现降低滤失量和抑制粘土膨胀的目的。
[Abstract]:With the development of exploration and development of oil and gas resources to deep strata, the treatment agent, which is a key component of water-based drilling fluid system, is facing the severe test of high temperature and salt calcium intrusion. The water-based drilling fluid treatment agent, which has both inhibition and filtration reduction properties, has become a new subject in the field of oil field chemistry in China. According to the theory of molecular structure design, this paper combines the structural characteristics of existing temperature-resistant and salt-tolerant treatment agents. Free radical copolymerization was carried out with potassium persulfate as initiator and pure water as solvent. Amphoteric copolymer filtration reducer AMPS / AM / AA was synthesized. The reaction conditions of AMPS / AM / AA were optimized by investigating the changes of product inhibition, rheological properties and filtration loss performance under different synthesis conditions: the amount of initiator, the total concentration of monomer, and the ratio of monomer. The optimum synthetic conditions for the preparation of AMPS/AM/AA were determined by reaction temperature, reaction time and so on. The polymer AMPS/AM/AA was characterized by FTIR and TGA. The results show that the polymer has main functional groups, moderate molecular weight, good thermal stability and high temperature resistance at 330 鈩，

本文编号：1644536