【摘要】 在稠油热采过程中,井筒蒸汽沿程参数计算及井底参数评价都是针对普通蒸汽展开的。与普通湿蒸汽不同,过热蒸汽是单相气体,普通蒸汽井筒热损失计算模型不再适用。在充分考虑质量守恒、动量守恒、能量守恒定理基础上,引入过热蒸汽PVT数据体,建立了注过热蒸汽井筒沿程参数计算模型。通过编制程序,得到了不同条件下沿程过热蒸汽参数。分析计算结果认为,随着井深的增加,过热蒸汽的温度、压力变化较大,过热度的增加对沿程热损失的影响不大。更多还原

【Abstract】 In the course of thermal heavy oil recovery,calculating on-way parameters and evaluating bottom hole parameters through injection wellbore are generally based on the ordinary steam.However,as overheated steam is single-phase gas,heat loss calculation model for ordinary wet steam is not applicable.On the basis of conservation of mass,conservation of momentum,conservation of energy,with the introduction of the PVT data sets,the new on-way parameter calculation model through injection wellbore is set up.On-way overheated steam parameters under various conditions are obtained by programming.As the results showed,as the well depth increases,the temperature and the pressure of overheated steam varies greatly,the increase of injection temperature does not obviously impact the on-way heat loss.更多还原