外部激励多孔介质内油水分布的研究  

Study on the influence of external stimulation on the oil-water distribution in porous media

作　　者：胡昕扬 刘庆杰 张旭辉[4] 张祖波[3] HU Xinyang;LIU Qingjie;ZHANG Xuhui;ZHANG Zubo(School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,China;State Key Laboratory of Enhanced Oil Recovery,Research Institute of Petroleum Exploration and Development,Beijing 100083,China;Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院大学工程科学学院,北京100049 [2]中国科学院渗流流体力学研究所,河北廊坊065007 [3]中国石油勘探开发研究院提高采收率国家重点实验室,北京100083 [4]中国科学院力学研究所,北京100190

出　　处：《应用化工》2024年第12期2947-2950,2962,共5页Applied Chemical Industry

摘　　要：探讨了外部激励对多孔介质内油水分布的影响。使用露头岩心作为多孔介质模型,首先进行水驱油操作,直至油水分布达到稳定状态,利用低场核磁共振技术来表征该状态下多孔介质内部的油相分布;对该状态下的岩心进行超声激励实验,并重新分析振动后的油相分布状态,并与超声处理前的状态进行对比分析。研究显示,外部超声振动能够重新激活多孔介质内油水分布的动态变化,促进油分子在小孔隙内的迁移,并利用超声乳化作用实现表面活性剂乳化效果,减小油滴的直径,进而提高多孔介质中小孔隙的油相渗流能力。The research focused on examining the impact of external stimulation on the distribution of oil and water within porous media.Exposed core samples were employed as a model for porous media,initiating water flooding experiments to the point where the internal oil-water distribution in the porous medium reached a steady state.Low-field nuclear magnetic resonance(NMR)technology was then utilized to characterize the internal oil phase distribution under this stable state.Subsequently,ultrasonic excitation experiments were conducted on the cores in this state,recharacterizing the oil phase distribution after vibration,and performing a comparative analysis with the state before ultrasonic treatment.The findings suggest that external ultrasonic vibration can restart the dynamic changes in oil-water distribution within porous media,promoting the migration of oil molecules within small pores.Through ultrasonic emulsification,a similar effect to chemical emulsifiers can be achieved,reducing the size of oil phase molecules and thereby enhancing the percolation capacity of the oil phase in smaller pores within porous media.

关 键 词：多孔介质 外部激励 超声波 乳化作用 油水分布 

分 类 号：TE357[石油与天然气工程—油气田开发工程] TQ027.6[化学工程]