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通常模拟混相驱动态采用组分模型，由于组分模型求解工作量大，计算速度慢，要求输入的参数较多，而这些参数很难取全取准，同时组分模型不易被油藏工程师所掌握。因此，介绍了一种模拟混相驱动态的模拟模型，该模型是在黑油模型基础上发展起来的拟四组分模型，它兼有黑油模型和多组分模型的某些优点，如黑油模型的稳定性好和计算速度快、组分模型的可模拟凝析气藏和混相驱等；给出了数学模型及各种物理参数以及混相流体性质的处理方法。该模型还以ＳＰＥ为例进行计算，结果与ＳＰＥ的结果一致，从而验证了本模型的可靠性。
Usually, the component model is used to simulate the mixed-phase driving state. Because of the large workload and slow computing speed of the component model, many parameters are required to be input, and these parameters are difficult to obtain the full standard. Meanwhile, the component model is not easy to be used by reservoir engineers grasp. Therefore, a simulation model of mixed-phase driving state is introduced. The model is a quasi-four-component model developed on the basis of black oil model. It combines some advantages of black oil model and multi-component model, such as black The stability of the oil model is good and the calculation speed is fast. The component model can simulate the condensate gas reservoir and the mixed-phase flooding. The mathematical models and various physical parameters and the treatment methods of the properties of the mixed-phase fluid are given. The model is also calculated with SPE as an example, and the result is consistent with that of SPE, which verifies the reliability of this model.