【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。更多还原

【Abstract】 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.更多还原