摘要
基于大庆萨北油田高含水期油藏控制水窜的需要,研制了氮气泡沫驱替液。三管非均质岩心驱油实验结果表明,与聚合物驱相比,注氮气泡沫可以显著降低驱替前后高渗透岩心的出液比率和出水比率,氮气泡沫比聚合物能更有效地封堵高渗透带。现场应用结果表明,氮气泡沫驱替液能有效地抑制注入水沿高渗透部位的突进,提高驱油效率,使得整个试验井组产出液平均含水率由93.9%下降到90.2%,在产液量降低41t/d油量增加16.4t/d,半年内累计增油3 486t,增产和综合效益显著,该项技术适合大庆萨北油田高含水期进一步提高采收率,具有较好的应用前景。
The nitrogen foam displacement fluid was developed to meet the demand for controlling water breakthrough in the reservoirs with high water cut in Daqing Sabei Oilfield.The oil-displacement test using three heterogeneous cores showed that the nitrogen foam injection technique could decrease the produced liquid ratio and water cut of high-permeability reservoirs more significantly than the polymer displacement method.The field test indicated that nitrogen foam displacement could control the breakthrough of injected water along the high-permeability zone effectively.As a result,the oil displacement efficiency could increase considerably.In fact,the content of water in the output fluid of the tested wells decreased from 93.9% to 90.2%.The output of oil increased by 16.4 tons,whereas the output of the produced fluid decreased by 41 tons per day.The accumulated output of oil is 3 486 tons in half a year.The oil production increase and the overall efficiency are significant,which suggests that nitrogen foam displacement fluid can enhance oil recovery of Daqing Sabei Oilfield effectively and has good prospect in oilfield application.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2010年第1期91-95,共5页
Acta Petrolei Sinica
基金
国家科技重大专项“松辽盆地喇萨杏高含水示范工程“(2008ZX05000-042)”资助
关键词
氮气泡沫驱替液
高含水期储层
控制水窜
高渗透岩心
室内驱油实验
现场应用
nitrogen foam displacement fluid
high water cut reservoir
water breakthrough control
high-permeability core
laboratory oil-displacement test
field application
