摘要
基于分子设计及化学反应合成了化学驱油剂HPEN体系,分析了催化剂质量分数、反应温度、反应时间及投料比等因素对反应产率的敏感性。通过正交方案设计优选了HPEN的合成条件,岩心驱替实验评价了HPEN与磺酸盐复配体系的驱油特性,选取目标区块进行了现场应用实验。结果表明:HPEN适宜的合成条件为催化剂质量分数5%、反应温度100℃、反应时间6 h、脂肪醇聚氧乙烯醚与磺酸盐投料比1∶1.5。无机盐离子的存在会不同程度影响HPEN溶液体系的界面张力。1.0%的HPEN与磺酸盐按质量比3∶1复配时效果最佳,此时体系抗温能力为130℃,高矿化度溶液体系其界面张力仍处于10-2 mN·m^(-1)数量级范围。复配体系可显著提高现场原油采收率,实现老井日均产油4 t、日均产液16 m^(3)的效果。
A chemical oil displacement agent HPEN system was synthesized based on molecular design and chemical reactions,and the sensitivity of factors such as catalyst dosage,reaction temperature,reaction time,and feed ratio to reaction yield was analyzed.The synthesis conditions of HPEN were optimized through orthogonal design,and the oil displacement characteristics of the HPEN sulfonate complex system were evaluated through core displacement experiments.The target block was selected for on-site application experiments.The results showed that the synthesis conditions of HPEN were as follows:catalyst dosage of 5%,reaction temperature of 100℃,reaction time of 6 h,and feed ratio of 1∶1.5.The presence of inorganic salt ions could affect the interfacial tension of the HPEN solution system to varying degrees.The best effect was achieved when 1.0%HPEN was mixed with sulfonate at a ratio of 3∶1.At this time,the system had a temperature resistance of 130℃,and the interfacial tension of the high salinity solution system was still in the range of 10-2 mN·m-1.The composite system could significantly improve the on-site crude oil recovery rate,achieving an average daily oil production of 4 t and a daily liquid production of 16 m^(3)in old wells.
作者
闫海建
贾东林
齐永宁
李焕
王少楠
YAN Haijian;JIA Donglin;QI Yongning;LI Huan;WANG Shaonan(Yanchang Oilfield Co.,Ltd.Zichang Oil Production Plant,Yan'an Shaanxi 717300,China;Xi'an Shiyou University,Xi'an Shaanxi 710065,China)
出处
《当代化工》
CAS
2024年第6期1287-1290,1299,共5页
Contemporary Chemical Industry
基金
国家自然科学基金面上项目(项目编号:52174027)。
关键词
深度调剖
化学剂
驱油机理
采收率
Deep profile control
Chemical agents
Oil displacement mechanism
Recovery ratio
