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本文通过对动量方程、能量方程、散热方程等控制方程的离散求解，用稳态和瞬态相结合的方法，计算了超临界注汽油井地下垂直段、过渡段和水平段蒸汽参数（压力、温度等）和井简散热损失、压力降等随注入时间、注入流量和压力的变化规律．计算结果表明，随着井深的增加，蒸汽压力在垂直段和过渡段的前半部分是增加的，而在过渡段后半部分和水平段则减小，且同一井深位置随流量增加蒸汽压力减小，注入蒸汽压力高于２２ ＭＰａ时，井底蒸汽出口压力比入口高。同一井深位置每公斤蒸汽散热损失随流量的增加而减少，而随压力的增加无明显变化。井底蒸汽压力和温度在注入时间大约３天左右即趋于一稳定值，而井底热损失则随注入时间的增加而减少．
In this paper, the governing equations of momentum, energy and heat dissipation are solved discretely by the combination of steady-state and transient. The parameters of the vertical, transition and horizontal sections of the supercritical injection well are calculated. Temperature, etc.) and well Jane heat loss, pressure drop with the injection time, injection flow and pressure changes. The results show that with the increase of well depth, the steam pressure increases in the first half of the vertical section and the transition section, decreases in the second half of the transition section and in the horizontal section, and the steam pressure decreases with increasing flow at the same well depth , Injection steam pressure is higher than 22 MPa, bottom hole steam outlet pressure higher than the entrance. The heat loss per kilogram of steam in the same well depth decreases with the increase of flow rate, but no obvious change with the increase of pressure. The bottom hole steam pressure and temperature tended to be stable in about 3 days and the bottom hole heat loss decreased with the increase of injection time.