摘要
针对河南油田特高含水开采期厚油层内各小层强、弱交互水淹且小层间夹层薄无法分层堵水的技术难题,开展了正、负电性聚合物选择性控水技术的应用研究。通过静态吸附平衡实验和填砂管驱替实验,研究了正、负电性聚合物的使用浓度、吸附平衡时间、注入方式、注入轮次及正、负电性聚合物选择性控水效果。研究表明,按先正后负交替注入正、负电性聚合物5轮次后,填砂管水相封堵率达95.51%,油相封堵率为20.70%,选择性封堵作用明显。现场试验11井次,阶段累计增油5 290.1 t,降水49 685.6 m3,控水和增油效果显著。
Considering the sub-layer heavy and light cross-water-out of thick-reservoirs and incapable implementation of separate-layer water plugging due to thick interbeds in extra-high water-cut development period of Henan oilfield,the applications of selective water-controlling with positive-electron and negative-electron polymers were researched. The concentrations of positive-electron and negative-electron polymers,adsorption equilibrium time,injection approaches,injection rounds,and theefficiency of selective water-controlling with positive-electron and negative-electron polymers were studied through static adsorption equilibrium experiments and displacement experiments of sand-filling tube. Research indicates that after 5 alternating injection rounds of positive-electron and negative-electron polymers by injecting the positive-electron polymer firstly,the water and oil plugging ratios are 95. 51% and 20. 70% respectively with efficient selective plugging. 11 well-time field tests were implemented with efficient water-controlling and oil production increase,and the cumulative oil production increase water reduction are 5 290. 1 t and 49685. 6 m3 respectively.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第5期123-126,157,共4页
Special Oil & Gas Reservoirs
基金
中石化科技攻关项目"双河油田开发后期提高采收率技术综合应用研究"(P07067)部分成果
关键词
选择性堵水
正负电性聚合物
现场试验
河南油田
selective water plugging
positive-electron and negative-electron polymers
field test
Henan oilfield
