自发乳化微观驱油机理研究  

Microscopic Mechanism of Spontaneous Emulsification Displacement

作　　者：康万利[1] 刘述忍[1] 孟令伟[1] 王志伟[1] 周阳[1] 

机构地区：[1]中国石油大学(华东)提高油气采收率研究中心,山东青岛266555

出　　处：《石油天然气学报》2009年第3期99-102,共4页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(20873181);教育部博士点基金项目(200804250502);山东省自然科学基金项目(Y2008F20);山东省"泰山学者"建设工程项目(ts20070704)

摘　　要：利用可视化的微观光刻模型,通过显微观察和录像手段,直接观测了自发乳化驱油方法驱替水驱后的柱状残余油、岛状残余油、膜状残余油和盲端残余油时发生的现象,详细研究了自发乳化驱油方法提高原油采收率的微观机理,即:减小毛管力、界面扰动"拉油"、弹性变形"挤油"、降低界面张力和乳化液滴通过堵塞孔喉提高波及系数等,进一步完善了自发乳化驱油方法理论体系。Visual microscopic model system was used for oil displacement, the microscopic mechanism of spontaneous emulsification flooding was studied on the basis of analyzing the video of flooding prismatic residual oil, island residual oil, residual oil film and residual oil in dead-end after water flooding. The study shows that the main microscopic mechanisms of flooding all kinds of residual oils obtained can reduce capillary pressure, oil was pulled by interfacial disturbance to force out oil via elasticity of emulsions, ultra-low interfacial tension and emulsion drop are reduced by plugging pore throat and improving sweeping effect, by which e the theoretical system of spontaneous emulsification flooding method is further perfected.

关 键 词：自发乳化 微观驱油机理 采收率 界面张力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]