摘要
为解决油田用聚合物微球尺寸较大,并且前期膨胀过快而难以注入的问题,以丙烯酰胺(AM)、丙烯酸(AA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)为聚合单体,采用反相乳液二次聚合法,首先制备了阴离子核体微球,通过加入带有阳离子单体DMC的壳体材料和阳离子引发剂偶氮二异丁基脒盐酸盐(AIBA),利用阴阳离子的相互作用及阳离子引发机制,制备了核壳纳米微球(PAE微球)。采用FTIR、TGA、^(1)HNMR、SEM和TEM对其进行了表征,通过盐溶液溶解实验和界面张力测定,评价了PAE微球的化学稳定性、界面张力和润湿能力。通过吸水膨胀实验和模拟填砂管实验,评估了PAE微球的吸水膨胀性能和调驱性能。结果表明,质量分数0.5%的PAE微球乳液可将界面张力从70.10 mN/m降至1.12 mN/m。在65℃下,PAE微球可缓膨35 d,膨胀倍数可达13.51。PAE微球的采收率为72.34%,采收率增幅可达18.45%。
In order to address the problem of large size and the difficulty in injection due to the rapid expansion rate in the early stage associated with polymer microspheres for oilfield use,anionic core microspheres were prepared by reverse emulsion secondary polymerization using acrylamide(AM),acrylic acid(AA)and methyl acryloxyethyl trimethyl ammonium chloride(DMC)as polymeric monomers,and interacted with cationic monomer DMC shell material and cationic initiator azodibutyramide hydrochloride(AIBA)to obtain core-shell nanospheres(PAE microspheres),which were characterized by FTIR,TGA,^(1)HNMR,SEM as well as TEM,evaluated by salt solution dissolution experiment and interfacial tension measurement for chemical stability,interfacial tension and wetting ability,and analyzed by water absorption and expansion experiments and simulated sand tube experiments for water absorption and expansion performance.The results showed that PAE microsphere emulsion with 0.5%mass fraction could reduce the interfacial tension from 70.10 mN/m to 1.12 mN/m.At 65℃,PAE microspheres could be slowly expanded for 35 d,with the expansion ratio reaching 13.51,the oil repulsion rate 72.34%,and the recovery increased by 18.45%.
作者
左巧林
仝其雷
范振忠
刘庆旺
乔三原
郑弘扬
ZUO Qiaolin;TONG Qilei;FAN Zhenzhong;LIU Qingwang;QIAO Sanyuan;ZHENG Hongyang(Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Bohai Energy Research Institute of Northeast Petroleum University,Qinhuangdao 066004,Hebei,China;Qinhuangdao Branch,Northeast Petroleum University,Qinhuangdao 066004,Hebei,China)
出处
《精细化工》
2025年第10期2288-2298,共11页
Fine Chemicals
基金
国家自然科学基金项目(52478237)。
关键词
反向乳液法
核壳纳米微球
油田调驱
提高采收率
缓膨性能
二次聚合
油田化学品
reverse emulsion method
core-shell nanospheres
oilfield profile control and flooding
enhanced oil recovery
slow-expanding performance
secondary polymerization
oil field chemicals
作者简介
左巧林(1997-),男,硕士生,E-mail:zuoqiaolin@163.com;联系人:仝其雷(1991-),男,讲师,E-mail:neputongqilei@163.com。
