摘要
为了提高油田污水的利用率和二元驱油体系的界面性能,通过对环烷基石油磺酸盐(KPS)与甜菜碱(TCJ)进行复配,测定了临界胶束浓度、界面张力等参数,研究了两者间的复配规律;并分析了二元复配体系的界面性能、抗吸附性能、长期稳定性及驱油效率,研发出了性能较优的二元复配体系配方。实验结果表明,两种表面活性剂复配后,临界胶束浓度为8.51 mg/L,低于两种单一的表面活性剂,表现出正加和协同效应,同时界面张力达到超低,抗Ca^(2+)浓度窗口明显变宽,由80~110 mg/L增加到110~270 mg/L;研究设计出的污水配制二元复配体系的界面性能和长期稳定性较好,并对岩心具有较强的抗吸附效应。物理模型驱油效率实验结果表明,注入0.7 PV的0.18%(w)KYPAM+0.5%(w)表面活性剂(m(KPS)∶m(TCJ)=7∶3)二元复配体系,可提高采收率25%以上。
In order to improve the utilization rate of oilfield wastewater and the interfacial performance of binary flooding system,the complex law between naphthenic petroleum sulfonate(KPS)and beet-alkali(TCJ)was studied by measuring the critical micelle concentration and interfacial tension.The interfacial performance,anti-adsorption performance,long-term stability and oil displacement efficiency of binary compound system were analyzed,and the formulation of the binary compound system with better performance was developed.The results showed that the critical micelle concentration of the compounding surfactants was 8.51 mg/L,which is lower than that of the single surfactants,showing positive additive synergistic effect.At the same time,the interfacial tension was extremely low,and the anti-Ca^(2+) concentration window was significantly wider,increasing from 80-110 mg/L to 110-270 mg/L.The designed system has good interfacial properties and long-term stability,and has strong anti-adsorption effect on the core.The displacement efficiency test results of the physical model show that the injection of 0.18%(w)KYPAM+0.5%(w)surfactantagent(m(KPS)∶m(TCJ)=7∶3)system of 0.7 PV can improve oil recovery by more than 25%.
作者
云庆庆
徐崇军
邵洪志
帕提古丽·麦麦提
焦秋菊
Yun Qingqing;Xu Chongjun;Shao Hongzhi;Patiguli Maimaiti;Jiao Qiuju(PetroChina,Research Institute of Exploration and Detection,Xinjiang Oilfield Branch Company,Karamay XinJiang 834000,China)
出处
《石油化工》
CAS
CSCD
北大核心
2021年第9期940-944,共5页
Petrochemical Technology
基金
国家科技重大专项“化学驱提高采收率技术”(2016ZX05010-004)
中国石油科技重大专项“新疆和吐哈油田勘探开发关键技术研究与应用”(2017E-04-06)。
关键词
石油磺酸盐
甜菜碱
复配体系
污水
petroleum sulfonate
beet-alkali
binary compound system
waste water
