摘要
交联聚合物微球的颗粒粒径和溶胀性能是影响调驱效果的主要因素。为提高交联聚合物微球在高含水、强非均质性油藏深部调驱中的应用效果,通过粒径实验、岩心驱替实验等对交联聚合物微球分散体系的性能进行了评价。结果表明:交联聚合物微球在60℃条件下、用孤岛回注污水溶胀10d后,粒径中值增大了34倍;交联聚合物微球分散体系的单管封堵率大于92%,双管岩心驱油实验提高采收率大于11%,交联聚合物微球分散体系完全能够满足孤岛油田高渗透油藏深部调驱的要求。在GD2-24斜516井组实施了交联聚合物微球分散体系深部调驱现场试验,注水井油压上升了2.9MPa,对应一线油井见效高峰期含水率下降了5.6%,单井平均增产原油5t/d。表明交联聚合物微球深部调驱是改善注水剖面和降低油井含水率的有效方法。
The dominant factors of deep profile control and displacement are particle size and swelling ability of crosslinked polymer micro-ball. In order to improve the application effect of the deep profile control and displacement of crosslinked polymer micro-ball in high water cut reservoir which is inhomogeneous seriously, the a-daptability of the micro-ball disperse system was evaluated by experiments of particle size analysis and core displacement. The result shows when the micro-balls prepared by Gudao waste water swelled at 70℃ for 10 days,they expanded 34 times in particle size. The blockage ratio of single pipe of the micro-ball was more than 92% , and the recovery ratio was 11 % more in dual core flooding experiment. So it could be concluded that the crosslinked polymer micro-ball system was applicable to deep profile control and displacement of the high permeability reservoir in Cudao Oilfield. Field experiment was made on well group of GD2-24X516. The injected pressure of injection wells increased to 2.7MPa,and the maximum water cut of the corresponded oil wells decreased to 5.6% ,and average increased oil yield was 5t/d. The crosslinked polymer micro-ball system is effective on injection profile improvement and water cut decline of oil wells.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2008年第2期86-88,共3页
Petroleum Geology and Recovery Efficiency
基金
中国石化集团公司先导项目“孤岛油田耐温稳定微溶胶深部调驱技术”(2006G12)
关键词
交联聚合物微球
粒径
溶胀
调驱
矿场试验
孤岛油田
crosslinked polymer micro-ball, particle size, swell, profile control and displacement,field test,Gudao Oilfield
