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本文给出了低浓度、低张力水驱油问题的统一的渗流方程式,在此基础上建立了包括水驱、活性水驱和低张力水驱在内的统一的数值模拟模型。模型中包含了相对渗透率随毛管数变化、活性物的吸附、界面张力变化、润湿性的转化、毛管力和重力影响等重要物理化学现象;它可以对水驱、活性水驱、低张力水驱或它们的任何有意义组合的驱油问题进行模拟;并可以对任何有意义的油层和工作制度进行数值处理。用此模型模拟活性水驱油岩心实验,获得了令人满意的吻合结果。
In this paper, a unified seepage equation of low concentration and low tension water flooding is given. Based on this, a unified numerical simulation model including water flooding, active water flooding and low tension water flooding is established. The model contains important physical and chemical phenomena such as the change of capillary number, the adsorption of active substance, the change of interfacial tension, the wettability, the capillary force and the influence of gravity on the relative permeability; it can be used in water flooding, active water flooding, low tension Water flooding or any meaningful combination of flooding problems; and any meaningful reservoir and working system can be numerically treated. Using this model to simulate active water flooding core experiments, satisfactory results were obtained.