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用拉格朗日 欧拉模拟方法 ,采用并联毛细管道模型 ,定性地模拟研究了应用于三次强化采油中的三元复合驱 (ASP)溶液在多孔介质中的复杂流动行为。得到了低流速下ASP溶液在并联毛细管道中流动的速度场、应力场和压力场 ,同二次采油中驱油剂 (水 )的结果进行了比较。结果表明 ,三元复合驱流体在多孔介质中流动时 ,表现出明显的非牛顿流特性 ;其应力场的分布具有不对称性 ,在溶液流经收缩喉道时 ,受到的阻力来自高剪切应力和法向应力 ,这些阻力要比具有相同流速的二次驱油液 (水 )高得多。因此 ,在相同的流速下ASP溶液的流动会产生更大的压力降。通过将计算结果同有关的实验结果进行定性的比较 ,验证了拉格朗日 欧拉算法的合理性。
The Lagrange Eulerian simulation method and parallel capillary tunnel model were used to qualitatively simulate the complex flow behavior of ASP flooding in porous media applied to tertiary enhanced oil recovery. The velocity field, stress field and pressure field of ASP solution flowed in parallel capillary channels at low flow rate were compared with those of oil displacement agent (water) in secondary oil recovery. The results show that the ternary composite flooding fluid exhibits obvious non-Newtonian flow when it flows in porous media. The distribution of stress field is asymmetric. The resistance of the ternary composite flooding fluid from the high shear Stress and normal stress, these resistances are much higher than the secondary flooding fluid (water) with the same flow rate. As a result, the flow of ASP solution produces a greater pressure drop at the same flow rate. The rationality of Lagrange Eulerian algorithm is verified through the qualitative comparison between the calculation results and the related experimental results.