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温度对稠油流变性有一定的影响，且存在某一临界温度Ｔｃｒ．当温度高于Ｔｃｒ时，稠油可以视为牛顿流体；当温度低于Ｔｃｒ时，为非牛顿流体，并存在一个初始剪切应力，可以用宾汉型本构方程来描述。根据宾汉流体的渗流方程，建立了新的热采数值模型，该模型中考虑了稠油在低于临界温度时呈现为宾汉流体的特性。采用粘度校正法和系数校正法对采油参数进行了计算，并引入了初始压力梯度项。为了测试这两种方法的优劣，对新疆风城某采油方案进行了试算。试算结果表明，后一种方法在模拟精度、计算速度和计算稳定性方面比前一种方法更好。对曙１７５油藏进行的实例分析结果表明，数值模型模拟的渗流情况符合稠油地下渗流的实际情况，可用于实际的热力采油计算。
Temperature has a certain impact on the rheological properties of heavy oil, and there is a certain critical temperature Tcr. When the temperature is higher than Tcr, heavy oil can be regarded as Newtonian fluid. When temperature is lower than Tcr, it is non-Newtonian fluid, and there is an initial shear stress, which can be described by Bingham constitutive equations. According to the seepage equation of Binham fluid, a new numerical model of thermal recovery is established. The model takes into account the characteristics of Bingham fluid when the heavy oil is below the critical temperature. Oil production parameters were calculated using viscosity correction and coefficient correction, and the initial pressure gradient term was introduced. In order to test the pros and cons of these two methods, a wind exploration project in Xinjiang was tested. The trial results show that the latter method is better than the former method in terms of simulation accuracy, calculation speed and computational stability. The case study of Shu 175 reservoir shows that the seepage flow simulated by numerical model accords with the actual situation of heavy oil underground flow and can be used in the actual calculation of thermal oil recovery.