填砂管模型上三元复合驱油体系的色谱分离实验研究

Experimental Study of Chromatographic Separation of Surfactant/Alkaline/Polymer Flooding in Porous media

在天然油砂模型上进行了三元复合体系的流动实验，研究了润湿性、渗透率、渗流距离对三元复合体系色谱分离的影响．结果表明：驱油过程中化学剂间存在色谱分离现象；水湿条件下三元复合体系的色谱分离程度比油湿条件下明显，碱和活性剂之间的无因次等浓距，水湿比油湿增加０．２４；聚合物和活性剂之间的无因次等浓距，水湿比油湿增加０．２６．渗透率越低、渗流距离越长，三元复合体系的色谱分离程度越明显．

The flow experiments have been conducted on chromaticgraphic separation of surfactant/alkaline/polymer flooding in porous media. The effects of wettability, permeability, the flowing distance through the porous media on the chromaticgraphic separation have been studied. The results show that the chromaticgraphic separation of surfactant/alkline/polymer flooding exist among the components of the mixture; the degree of chromaticgraphic separation in the water wet core is more obvious than that in the oil wet core, the normalized equal concentration distance between alkline and surfactant in the water wet core is bigger than that in the oil wet core by 0.24, the normalized equal concentration distance between polymer and surfactant in the water wet core is bigger than that in the oil wet core by 0.26. The lower the core permeability is, the longer the flowing distance through the core is, and the more obvious the degree of chromaticgraphic separation of Surfactant/Alkaline/Polymer Flooding in porous media is.