低渗透油层微观孔隙结构研究

发布时间：2018-03-15 02:31

本文选题：孔喉比　切入点：葡萄花油层　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：不同地区渗透率相近的低渗透油藏在开发动用难度、生产特征上存在很大的差异,为了研究低渗透油层与高渗透油层孔隙结构的差异,从微观上找出低渗透油层驱油效率低的原因,本文研制了适合低渗透岩心的微观解剖实验方法并完成了设备组装。该方法利用金相显微镜的观测结果,通过大庆升平油田葡萄花低渗透油层岩心的孔隙结构,结合景深扩展软件、测量软件,可实现对低渗透天然岩心自然断面上的孔隙半径、孔喉比、平面配位数、平面迂曲度、形状因子等微观参数测量。分析实验数据得到孔喉比大、形状因子小是低渗透岩心与高渗透岩心最显著的差异,是低渗透岩心驱油效率低的主要微观影响因素。
[Abstract]:In order to study the difference of pore structure between low permeability reservoir and high permeability reservoir, there are great differences in development difficulty and production characteristics in low permeability reservoirs with similar permeability in different regions. In order to find out the reason of low oil displacement efficiency in low permeability reservoir, a microscopic anatomical experiment method suitable for low permeability core is developed and the equipment is assembled. The method is based on the observation results of metallographic microscope. Through the pore structure of the core of Putaohua low permeability reservoir in Shengping Oilfield of Daqing, combined with depth of field expansion software and measuring software, the pore radius, pore-throat ratio, plane coordination number, plane tortuosity of the natural section of low permeability natural core can be realized. From the analysis of experimental data, it is found that large pore throat ratio and small shape factor are the most significant differences between low permeability core and high permeability core, and are the main microcosmic factors influencing low oil displacement efficiency of low permeability core.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE348

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