考虑相态变化的凝析气井井筒瞬变流动分析

对于含水的凝析气藏（特别是凝析油含量较高的），由于井筒内压力和温度的变化，凝析气在井筒的相态和油气相的组成变化也较大；而且在实际的井筒流动中，往往会出现一些非稳定的因素。文中综合考虑了流动过程中相态的变化和非稳定流动因素的影响，建立了数学模型，该模型能正确地预测产水凝析气井的井筒动态。通过实例计算证明该模型的结果更符合实际情况，在流动达到稳定后，非稳定模型的计算结果和稳态模型的结果是一致的。

FLOW ANALYSIS OF CONSIDERING PHASE STATE CHANGE IN WELLBORE OF GAS CONDENSATE WELL

To some hydrous gas condensate reservoir (especially have upper content condensate), owing to the changes of pressure and temperature in borehole, the phase state of condensate gas and the compose of oil and gas in borehole will changes. Moreover, there are some unsteady factors occur in practical tub flowing, In article, the change of phase state and unsteady flow factor in flow process are considered, the mathematical model is established. This model could forecast the flow dynamic in wellbore of gas - condensate well with water. The example provided that this model' s calculation result more truthfulness. After flowing reached the stabilization, the calculation results of unsteady model are consistent with steady - state model.