摘要
以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、N-乙烯基吡咯烷酮(NVP)、二甲基二烯丙基氯化铵(DMDAAC)为共聚单体,过硫酸铵与亚硫酸氢钠(摩尔比为1∶1)为引发剂,通过自由基水溶液聚合制备了一种抗高温聚合物降滤失剂CQ-1。利用FT-IR、^(1)H NMR及热重分析对CQ-1的结构和热稳定性进行了表征,并通过单因素实验优化了降滤失剂的合成条件。实验结果表明,优化反应条件为:n(AM)∶n(AMPS)∶n(NVP)∶n(DMDAAC)=70∶20∶2∶8,单体总质量分数为20%,引发剂质量分数为0.5%,反应温度55℃,反应时间5 h。在此条件下,CQ-1抗温达240℃,在质量分数为1%时,240℃老化后钻进液中压滤失量为16.2 mL,180℃高温高压滤失量为48.8 mL,优于Driscal D、Dristemp等同类产品。
High-temperature resistant polymer filtration reducer CQ-1 was prepared by free radical polymerization of acrylamide(AM),2-acrylamide-2-methylpropanesulfonic acid(AMPS),N-vinylpyrrolidone(NVP),and dimethyldiallyl ammonium chloride(DMDAAC)as comonomers,ammonium persulfate and sodium bisulfite(molar ratio of 1∶1)as initiators in aqueous solution.The structure and thermal stability of CQ-1 were characterized by FT-IR,^(1)H NMR,and thermogravimetric analysis,and the synthesis conditions of the filtration reducer were optimized through single factor experiments.The experimental results showed that the optimal reaction conditions are as follows:n(AM)∶n(AMPS)∶n(NVP)∶n(DMDAAC)=70∶20∶2∶8,the total amount of monomer is 20%,the amount of initiator is 0.5%,the reaction temperature is 55℃,and the reaction time is 5 h.The evaluation of the filtration performance of the reducer in water-based drilling fluid shows that CQ-1 has a temperature resistance of 240℃and excellent performance inreducing loss of fluid.When the dosage is 1%,the medium pressure filtration loss after 240℃aging is 16.2 mL,and the high temperature and high pressure filtration loss at 180℃is 48.8 mL.CQ-1 is superior to similar domestic and foreign products such as Driscal D and Dristemp.
作者
林凌
苏欢
董宏伟
Lin Ling;Su Huan;Dong Hongwei(College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan,China;National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi’an 710016,Shannxi,China;Drilling and Production Engineering Technology Research Institute of Chuanqing Drilling Engineering Co.,LTD.,Xi’an 710016,Shannxi,China)
出处
《精细石油化工》
CAS
2023年第5期36-41,共6页
Speciality Petrochemicals
基金
川庆钻探工程有限公司科技项目(CQ2021B-42-Z4-3)。
关键词
降滤失剂
水基钻井液
抗高温
性能评价
filtration reducer
water-based drilling fluid
resistance to high temperature
performance evaluation
