Abstract: The Logistic model and Yu model are the most simple and commonly used models for water cut forecast, but both of the models have some flaws such as unclear seepage characteristics, the lack of model optimization technology, especially the uncertain relationships among the undetermined, dynamic and static parameters in the model, which could result in the unsufficient theoretical support to water control measures and irrigorous water cut forecast. Therefore, based on the Willhite oil-phase permeability formula and its modified formula, and combined with Эфрос’s experimental results, four water cut prediction models and the corresponding water-phase permeability formulas are derived. The improved water cut forecast models can be converted into Logistic model and Yu model under certain conditions, so they will be generalized to some extent. The analyses of water cut changes predicted by the 4 models show that the hyperbolic model is suitable for matching Г-shaped variations of water cut with production time; the exponential model is applicable for matching S-shaped variations of water cut with production time; the harmonic model and complex exponential model can match both Г-shaped and S-shaped variations of water cut with production time. The application results of the models in the developed block of Sabei transitional zone in Daqing oilfield, H2 reservoir in Pinghu oil and gas field and the reservoirs of Paleogene-Neogene in Yanmuxi oilfield show that the improved models for water cut forecast can make high-accuracy matching and get good effects, which could provide reference for other oilfields.