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对含轻质组分稠油油藏蒸汽注采过程数值模拟的自适应网格方法进行研究。网格的细化和粗化是自适应网格方法的基本步骤,为克服组分摩尔分数在网格细化过程中出现小于0或大于1的非物理振荡,提出了一个有效的守恒修正分片线性插值算法;指出可挥发的轻质组分分子量较大时,除了温度和各相饱和度外,组分摩尔分数需作为网格细化的判据。算例显示自适应网格方法有着很好的计算精度和计算速度。
The adaptive grid method of numerical simulation of steam injection and production process for light fraction heavy oil reservoirs was studied. The refinement and coarsening of the grids are the basic steps of the adaptive grid method. To overcome the non-physical oscillation of the mole fraction of the components in the process of mesh refinement that is less than 0 or greater than 1, an effective conservation correction Linear interpolation algorithm. It is pointed out that the mole fraction of components except the temperature and the saturation of each phase should be used as the criterion of the mesh refinement when the molecular weight of volatile light components is large. The examples show that the adaptive grid method has good calculation accuracy and speed.