微波-磁性纳米Ni粉对稠油破乳效果的pH值响应性  

pH Responsiveness of Microwave-Magnetic Nano-Ni Powder to the Demulsification Effect of Heavy Oil

作　　者：孙娜娜[1,2] 沈莉莎 孙会娜 苏瑞宇 齐红媛 SUN Nana;SHEN Lisha;SUN Huina;SU Ruiyu;QI Hongyuan(College of Petroleum Engineering,Xi′an Shiyou University,Xi′an 710065,China;Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs,Xi′an Shiyou University,Xi′an 710065,China)

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]西安石油大学陕西省油气田特种增产技术重点实验室,陕西西安710065

出　　处：《石油学报（石油加工）》2022年第5期1230-1238,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(51904246);陕西省自然科学基础研究计划项目(2018JQ5206);西安石油大学研究生创新与实践能力培养计划项目(YCS20213147)资助。

摘　　要：通过瓶试法研究了不同pH值下有/无微波辐射时磁性纳米Ni粉对稠油水包油(O/W)型乳状液破乳效果的影响规律,在此基础上,结合油滴形貌和分布以及乳状液表观黏度揭示了微波-磁性纳米Ni粉破乳效果的pH值响应行为机理。结果表明:当pH值相同时,单纯磁性纳米Ni粉和微波-磁性纳米Ni粉作用下的乳状液的分水率都随着磁性纳米粒子浓度的增加先上升后下降;与此同时,磁性纳米Ni粉与微波具有协同破乳的作用,且随着pH值增大,微波与磁性纳米Ni粉的耦合作用先减弱后增强,在pH值为3时两者的耦合作用最强,该条件下乳状液的分水率在30 min时达到102.63%。Using bottle test method,this paper studies the influence law of magnetic nano-Ni powder on the demulsification effect of heavy oil O/W(Oil-in-water)emulsion at different pH values with and without microwave radiation.On this basis,combined oil droplet morphology and distribution with apparent viscosity of emulsion,the pH value response behavior mechanism for the demulsification effect of microwave-magnetic nano-Ni powder is revealed.The results show that when the pH value is the same,the water separation rates of the emulsion under the action of pure magnetic nano-Ni powder and microwave-magnetic nano-Ni powder both increase first and then decrease with the increasing concentration of the magnetic nano-particles;meanwhile,magnetic nano-Ni powder and microwave have a synergistic demulsification effect,and as the pH value increases,the coupling effect of microwave and magnetic nano-Ni powder is first weakened and then enhanced,which hits the peak when the pH value is 3,and the water separation rate of the emulsion under this condition reaches up to 102.63%in 30 min.

关 键 词：磁性纳米Ni粉 微波 pH值 协同破乳 表观黏度 油滴形貌 

分 类 号：F407.22[经济管理—产业经济]