【摘要】 该文在带传质扩散的一维单向流和平面径向流的渗流数学模型的基础上，导出了确定单向流及五点法井网注示踪剂段塞时扩散系数的数学公式。利用天然岩心注示踪剂的方式及人造五点法平板模型注示踪剂段塞的方式，分别测定了示踪剂在单向渗流及五点法井网渗流过程中的渗流系数。实验结果表明：示踪剂在地下渗流过程中扩散系数与地层的渗透率、注入示踪剂的类型及浓度、注入速度有关。更多还原

【Abstract】 Based on the percolating mathematic models of 1 dimensional directional flow and planar radial flow with mass transfer and diffusion.The formula which determines diffusion coefficient of directional flow with injecting tracer slug into five spot well pattern is derived.By the way of injecting tracer into native core and injecting tracer slug into synthetic five spot plane model,the percolation coefficient for above conditions are determined respectively.Experimental results showed that the diffusion coefficient of tracer in underground percolating process depends on the formation permeability,types and concentration of injected tracer,and injection rate.更多还原