摘要
为制备一种稳泡能力较强,降黏与起泡能力优异的石墨烯量子点(GQDs)起泡剂,采用柠檬酸水热法制备了GQDs,然后对其进行γ-甲基丙烯酰氧基丙基三甲氧基硅烷偶联剂功能改性,制备了两亲性石墨烯量子点型起泡剂(D12-5-GQDs)。采用FTIR、纳米粒度电位仪、UV-Vis对D12-5-GQDs进行了结构表征和性能测试,通过评价静/动态吸附量、界面张力、起泡高度和分流率,阐明了不同实验条件下D12-5-GQDs的发泡能力、稳泡剂协同特性以及降黏调驱等能力。结果表明,温度31℃时,质量浓度1.0 g/L的D12-5-GQDs的能力最佳,15 min内载液量可达187 mL;D12-5-GQDs应用范围在30~350℃,质量浓度1.0 g/L的D12-5-GQDs水溶液在350℃时起泡体积仍能>200 mL;D12-5-GQDs的抗吸附能力较强,最终平衡吸附量约为0.18 mg/g;质量浓度1.0 g/L的D12-5-GQDs溶液调驱能力较好,级差4.6与16.6对应的高、低渗最终分流率之比分别为61∶38和70∶29;D12-5-GQDs在0.5 PV(孔隙体积)的注入量下可迅速起效调驱,并在1.5 PV左右使分流率趋于稳定。
To prepare a graphene quantum dots(GQDs)foaming agent with strong foam stability,excellent viscosity reduction and foaming ability,GQDs were firstly prepared by citric acid hydrothermal method,and then modified with γ-methacryloxy propyl trimethoxyl silane coupling agent to obtain amphiphilic graphene quantum dot foaming agent(D12-5-GQDs).The D12-5-GQDs was characterized by FTIR,nanoparticle potentiometry,and UV-Vis for structural characterization and property analysis.The foaming ability,foam stabilizer's synergistic characteristics,and viscosity reduction and displacement control capability of D12-5-GQDs under different experimental conditions were elucidated by static and dynamic adsorption capacity,interfacial tension,foaming height,and fractional flow rate.The results showed that D12-5-GQDs with a mass concentration of 1.0 g/L exhibited the best foaming ability at 31℃,with its fluid carrying capacity reaching 187 mL within 15 min.The application temperature range of D12-5-GQDs was 30~350℃,and the foaming volume of D12-5-GQDs aqueous solution with a mass concentration of 1.0 g/L could still exceed 200 mL at 350℃.D12-5-GQDs displayed stronger anti-adsorption ability,with a final equilibrium adsorption capacity of only about 0.18 mg/g.The D12-5-GQDs solution with a mass concentration of 1.0 g/L showed good displacement control ability,with the ratio of high and low permeability final fractional flow rates corresponding to a gradation of 4.6 and 16.6 of 61∶38 and 70∶29,respectively.D12-5-GQDs could quickly take effect at an injection volume of 0.5 PV(pore volume)and stabilize the fractional flow rate at around 1.5 PV.
作者
吴景春
代勇辉
石芳
殷鹏
蓝斌斌
张春龙
WU Jingchun;DAI Yonghui;SHI Fang;YIN Peng;LAN Binbin;ZHANG Chunlong(Key Laboratory for EOR Technology(Ministry of Education),Northeast Petroleum University,Daqing 163318,Heilongjiang,China;College of Chemical Engineering and Technology,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Daqing Oilfield Limited Company,No.6 Oil Production Company,Daqing 163458,Heilongjiang,China;Daqing Yongzhu Petroleum Technology Development Company,Daqing 166500,Heilongjiang,China)
出处
《精细化工》
北大核心
2025年第8期1841-1848,共8页
Fine Chemicals
基金
国家自然科学基金青年基金项目(52304026)
黑龙江省自然科学基金项目(LH2024E007)
大庆市科技创新引导项目(YZ-XS-202312-10)。
关键词
起泡剂
石墨烯量子点
泡沫复合驱
稠油热采
提高采收率
油田化学品
foaming agents
graphene quantum dots
foam composite flooding
thermal heavy oil recovery
enhanced oil recovery
oilfield chemicals
