摘要
针对海上低渗油藏注水开发效果较差的问题,开发了水基乳液聚合物凝胶和分散微凝胶颗粒,以提升调驱效果。性能评价结果表明,0.6%水基乳液聚合物RJ-03溶解时间20 min,溶解后的溶液黏度18 mPa·s,0.6%聚合物+0.3%分子络合剂+0.25%成胶控制剂的成胶液成胶时间为8 d,成胶黏度为4395 mPa·s;分散微凝胶颗粒初始粒径为2.13μm,分布均匀,稳定性指数1.8,颗粒间可发生聚并;凝胶和分散微凝胶在不同渗透率的多孔介质内,封堵和选择封堵效果良好。矿场应用结果表明,组合调驱体系注入期间压力仅升高3.5 MPa,受效井产油增加已持续254d,井组累计增油量5754 m^(3)。
In view of the poor waterflooding development effect of offshore low⁃permeability reservoirs,water⁃based emulsion polymer gel and dispersed micro gel particles were developed to improve the profile control and flooding effect.The results of performance evaluation showed that the dissolution time of 0.6%aqueous emulsion polymer RJ⁃03 was 20 minutes,the solution viscosity after dissolution was 18 mPa·s.The gelling time of 0.6%polymer+0.3%molecular complexing agent+0.25%gelling control agent was 8 d,and the gelling viscosity was 4395 mPa·s;The initial particle size of dispersed micro gel is 2.13μm and the distribution is uniform.The stability index is 1.8,and the coalesce particles could occur between particles.Gel and dispersed micro gel have good plugging and selective plugging effects in porous media with different permeability.The field application results showed that during the injection period of the combined displacement control system,the pressure only increased by 3.5 MPa,and the oil production of the affected wells has continued to increase for 254 d,with a cumulative increase of 5754 m^(3)in the well group.
作者
冯轩
郐婧文
徐国瑞
李翔
王晓龙
李晓伟
Feng Xuan;Kuai Jingwen;Xu Guorui;Li Xiang;Wang Xiaolong;Li Xiaowei(China Oilfield Services Co.LTD.,Tianjin 300459,China;State Key Laboratory of Efficient Offshore Oil Development,Beijing 100028,China)
出处
《精细石油化工》
2025年第5期49-52,共4页
Speciality Petrochemicals
基金
中海油田服务股份有限公司科技项目(YSB24YF009)。
关键词
低渗油藏
调驱
水性凝胶
分散微凝胶
海上油田
low permeability reservoir
profile control and oil displacement
hydrogel
dispersed micro gel
offshore oil field
