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考虑了聚合物溶液在地层中存在扩散、对流和不可及孔隙体积等物化作用,建立了聚合物驱复合油藏试井模型,通过有限差分算法对数学模型进行了数值求解,研制了典型曲线图版.研究表明:典型曲线存在5个流动段,聚合物溶液初始浓度越大,过渡段和内区径向流段上翘幅度越大;外区原油黏度越大,两区共同作用段上翘幅度越大;内区半径越大,不可及孔隙体积系数越小,内区径向流持续时间越长,内外区过渡段出现越晚.
Taking into account the existence of polymer solution diffusion in the stratum, the convection and the inaccessible pore volume and other physical and chemical effects, the establishment of a polymer flooding composite reservoir well testing model, finite difference algorithm to solve the mathematical model, developed a typical curve plate The results show that there are 5 flow sections in the typical curve, the larger the initial concentration of the polymer solution is, the larger the uptaking amplitude of the radial flow in the transition zone and the inner zone is. The larger the radius of the inner zone, the smaller the volume coefficient of the inaccessible pore and the longer the duration of the radial flow in the inner zone, the later the transition zone appears in the inner and outer zones.