负电性高效聚合物降解剂研究及矿场先导试验
Study on Electronegative High-efficiency Polymer Degrading Agent and Field Pilot Test
闻宇晨 1侯吉瑞 1娄泽洋 2潘以诺 1屈鸣3
作者信息
- 1. 中国石油大学(北京)提高采收率研究院,北京 102249
- 2. 中国石油青海油田分公司,青海 海西 816400
- 3. 东北石油大学三亚海洋油气研究院,海南 三亚 572024
- 折叠
摘要
针对聚合物驱过程中长期注聚合物导致的聚合物堵塞问题,研发了一种负电性高效聚合物降解剂.采用电子显微镜、Zeta电位仪和多重光散射仪等仪器,研究了降解剂的微观形貌特征、体系稳定性、降解性能和降黏性能,评价了降解剂在多孔介质中的动态降解效果.结果表明:降解剂的最佳用量为质量分数为 1.0%,该用量下聚合物降黏率和降解率均能达到 95%以上,对聚合物及聚合物胶团的降解能力强,解堵效果明显.该降解剂腐蚀性弱,对井筒和管道损害小.在锦州 9-3 油田W4-4 井开展了注聚合物井解堵矿场试验,验证了负电性高效聚合物降解剂的矿场解堵效果.该聚合物降解剂能够为聚合物驱高效开发提供技术支持.
Abstract
An electronagtive high-efficiency polymer degradation agent is developed in this study to address the problem of polymer plugging caused by long-term polymer injection during polymer flooding.In this study,the mi-croscopic morphology,system stability,degradation performance,and viscosity reduction performance of the degra-dation agent were studied by means of electron microscopy,Zeta potentiometer,and multi-angle light scattering in-strument,and the dynamic degradation effect of the degradation agent in porous media was evaluated.The results show that the optimal dosage of the degradation agent is 1%by mass fraction,both the viscosity reduction rate and degradation rate of the polymer can reach over 95%at this dosage.The degradation agent exhibits strong capacity of degradation for polymers and polymer clusters,with a significant effect on removing blockage.And on the other hand,the degradation agent is featured with low corrosiveness and causes little damage to wellbore and pipelines.A field test of plugging removal by polymer injection was conducted in Well W4-4 of the JZ9-3 Oilfield,and the field plugging removal effect of electronegative high-efficiency polymer degradation agent was verified.This polymer degradation agent can provide technical support for the efficient development of polymer flooding.
关键词
聚合物驱/聚合物降解剂/堵塞/降黏率/降解率/提高采收率Key words
polymer flooding/polymer degradation agent/plugging/viscosity reduction rate/degradation rate/en-hanced oil recovery引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据