摘要
研究了表面活性剂如何通过降低油水界面张力和改善岩石润湿性提高低渗透油藏采收率,并对微观驱油机理进行了探究。结果表明,表面活性剂能够有效降低油水界面张力,当表面活性剂浓度从0 mg·L^(-1)升至50 mg·L^(-1)时,油水界面张力从72.5 mN·m-1降至10.4 mN·m-1,尤其是在表面活性剂浓度从0 mg·L^(-1)升至30 mg·L^(-1)时,油水界面张力显著下降;表面活性剂浓度与岩石表面吸附量及油藏采收率呈正相关,当表面活性剂浓度从0 mg·L^(-1)升至30 mg·L^(-1)时,岩石表面吸附量从0μg·cm^(-2)增至50.3μg·cm^(-2),当表面活性剂浓度从0 mg·L^(-1)升至50 mg·L^(-1)时,油藏采收率从25%升至62%。为低渗油田的化学增产提供了科学依据。
We studied how surfactants could improve the oil recovery of low permeability reservoirs by reducing oil-water interfacial tension and improving rock wettability,and explored the micro oil-displacement mechanism.The results show that surfactants can effectively reduce the oil-water interfacial tension.When the surfactant concentration increases from 0 mg·L^(-1)to 50 mg·L^(-1),the oil-water interfacial tension decreases from 72.5 mN·m-1 to 10.4 mN·m-1,especially when the surfactant concentration increases from 0 mg·L^(-1)to 30 mg·L^(-1),the oil-water interfacial tension decreases significantly.The surfactant concentration is positively correlated with the adsorption capacity on the rock surface and the oil recovery.When the surfactant concentration increases from 0 mg·L^(-1)to 30 mg·L^(-1),the adsorption capacity on the rock surface increases from 0μg·cm^(-2)to 50.3μg·cm^(-2).When the surfactant concentration increases from 0 mg·L^(-1)to 50 mg·L^(-1),the oil recovery increases from 25%to 62%.This study provides a scientific basis for chemical stimulation of low permeability oilfields.
作者
于泓滢
杜西龙
李钰
秦森强
王记锋
李毅峰
马斌
YU Hongying;DU Xilong;LI Yu;QIN Senqiang;WANG Jifeng;LI Yifeng;MA Bin(Shenyang Oil Production Plant of Liaohe Oilfield,Panjin 124010,China;No.5 Oil Production Plant of PetroChina Qinghai Oilfield Branch,Haixi 816401,China;No.2 Oil Production Plant of PetroChina Qinghai Oilfield Branch,Dunhuang 736202,China;No.6 Oil Production Plant of PetroChina Changqing Oilfield Branch,Yulin 718600,China;Research Institute of Process,Shuguang Oil Production Plant of Liaohe Oilfield,Panjin 124010,China;No.3 Oil Production Plant of PetroChina Qinghai Oilfield Branch,Haixi 817500,China)
出处
《化学与生物工程》
北大核心
2025年第4期41-45,共5页
Chemistry & Bioengineering
基金
国家自然科学基金青年基金项目(52104032)。
关键词
低渗透油藏
表面活性剂
化学性能
提高采收率
驱油机理
low permeability reservoir
surfactant
chemical property
enhanced oil recovery
oil-displacement mechanism
