为了从微观上探索复杂断块油田油水渗流规律,分析在不同含水阶段岩心孔隙结构的微观变化对驱油效率的影响,针对冀东油田主力油层3个区块的真实岩心的3个不同含水阶段,采用CT成像技术,对真实岩心进行不同角度的投影,并对二维图像二值化处理,对灰度图像进行三维重构,最终得到孔隙结构三维网络模型,求得岩心孔隙结构的微观参数.结果表明:驱油效率随配位数、形状因子、孔隙半径的增大而提高,随润湿角的增大而降低.通过对模拟结果与相应岩心物理模拟实验的对比,验证了该网络模型的有效性和可靠性.三维网络模型为进一步描述微观孔隙奠定了理论基础,对研究中高含水期油层孔隙结构的变化对驱油效率的影响具有指导意义和应用价值.
For the purpose of exploring the complex fault block oil field perquisite transfusion rule microscopically,this paper explores how core sample pore structure’s microscopic change in different watery stage affects the flushing efficiency.In view of the oil field main oil layer in Jidong of Hebei three subarea’s real core sample’s three different watery stage,we use the CT image formation technology,carry out the projection to the different angle of the real core sample,and to two-dimensional picture,use bina...