海上油田驱油用聚丙烯酰胺的研究
2020-08-25刘存辉石昀韩英波
刘存辉 石昀 韩英波



摘 要: 海上油田资源丰富,可开采潜力巨大,而海水中多种金属离子形成的高矿化度水质对聚丙烯酰胺的溶解性和耐温抗盐性提出了更高的要求。以丙烯酰胺和丙烯酸为主链,引入耐温、抗盐功能单体进行多元共聚,并通过改进引发体系,优化合成条件,成功制备出适应于海上油田驱油用速溶聚丙烯酰胺,满足海上油田高效注聚的需求。
关 键 词:聚丙烯酰胺;提高采收率;耐温抗盐;海上油田
中图分类号:TQ 016 文献标识码: A 文章编号:1671-0460(2020)05-0893-06
Abstract: Offshore oil fields are rich in resources and have great exploitable potential. The high salinity water quality formed by various metal ions in seawater has higher requirements for the solubility and temperature and salt resistance of polyacrylamide. In this paper, acrylamide and acrylic acid were used as the main chain, and the temperature-resistant and salt-resistant functional monomers were introduced for multicomponent copolymerization. By improving the initiation system and optimizing the synthesis conditions, the fast-soluble polyacrylamide suitable for offshore oil flooding was successfully prepared to meet the needs of high efficiency polymer injection in offshore oil fields.
Key words: polyacrylamide; enhanced oil recovery; heat resistance and salt tolerance; offshore field
近年来,随着石油勘探难度的逐渐增加,提高采收率新技术的研究和应用受到高度重视,化学驱作为提高采收率的主要手段,需要根据油藏的特殊性不断完善和升级产品类型。与陆地油田相比,海上油田具有前期勘探和后期开采操作费用巨大,采油平台使用寿命短及水驱采收率低等特点,如何快速溶解提高其开发效率是急需解决的难题之一[1, 2]。加之海上油田采用清水配制、海水稀释的配注工艺,海水中多种金属离子形成的高矿化度水质对聚丙烯酰胺的溶解性和耐温抗盐性提出了更高的要求。因此,研究出适用于海上油田驱油用聚丙烯酰胺,必将成为今后化学驱在海上应用以提高采收率的重点研究方向之一。
本研究突破了常规改性方法,利用高分子间相互作用及活性多官能团的自组装功能,使分子链具有结构互补和活性基团相互作用的功能,能有效提高溶解速度和耐温抗盐性[3]。……
