关键词: 表面活性剂, 数值模拟, 化学剂, 聚合物, 多孔介质, 质量分数, 数学模型, 边界条件, 界面张力, 组分

Abstract:

A compositional simulator for multidimensional chemical flooding is established. It takes all the main phenomena in the chemical flooding process (convection, diffusion-dispersion, exchanges among liquid phases and liquid-solid system) and boundary conditions suitable for the oilfield applications into consideration. It can simulate multiphase flow problems in porous media with different geometry. Under the present phenomenalogical knowledge condition, as many parameters as possible are involved in this model. It is different from other chemical flooding simulator by considering the following factors: the appropriate processing of phase equilibrium, the effect of capillary number distribution in space and time, the chemical consumptions, and other laboratory measured data, which make the model describing the real problems more correctly. It can be used to interprete laboratory results, study mechanisms of process, optimise the composition and size of the injected chemical slug etc, and can be used to simulate oilfield chemical flooding process, predict flooding performance and effects of various parameters, and also used to solve practical problems.