摘要
针对大庆特低渗透油田生产需要 ,开展了采用含表面活性剂的复合体系降低油层启动压力的实验 ,优选配制出非离子表面活性剂复配体系 ,实验结果表明 ,该体系可与大庆原油形成超低界面张力 ,具有较好的稳定性及对大庆低渗透油田地层水矿化度的适应性 ,在岩心中注入该体系可以降低注入压力 40 %～ 60 % .
To meet the need of Daqing oilfield to develop extra-low permeability reservoirs, experiments were conducted to lower the triger pressure with compound system containing surfactant and sought out the optimum system of compound nonionic surfactant. Experiments show that this system can produce super low interfacial tension with Daqing crude and has very good stability and adaptability to the salinity of formation water of Daqing's low permeability oilfields. Laboratory core flooding experiments prove that this system is capable of reducing injection pressure by 40%～60%, which is a significant improvement.
出处
《大庆石油学院学报》
CAS
北大核心
2003年第2期85-86,104,共3页
Journal of Daqing Petroleum Institute
关键词
特低渗透油层
表面活性剂
界面张力
启动压力
extra-low permeability reservoir
surfactant
interfacial tension
trigger pressure
