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在前苏联二层系统周期注水数学模型的基础上，考虑了在周期注水过程中高低渗透层之间的压力差及相应的液体交渗流动，建立了新的二层系统周期注水数学模型，应用油田的实际数据和井网，对周期注水进行数值计算，并将计算结果与ＰＯＴＯＰ模型的结果进行对比，说明利用本项研究所建立的新的数学模型也可以进行周期注水的可行性研究．
Based on the mathematic model of system waterflooding in the second floor of the former Soviet Union, a new mathematical model of two-stage system waterflooding was established, taking into account the pressure difference between the permeable layers and the infiltration flow of liquid during the period of water injection. The actual data and well pattern of oilfield are used to calculate the cycle water injection. The result of the calculation is compared with that of the POTOP model. It shows that the feasibility of periodic water injection can also be studied by using the new mathematical model established in this study.