凝析气井井眼压降和温降计算研究

在凝析气井井眼流体相态理论的基础上 ,综合考虑压力、温度之间的相互影响 ,建立凝析气井井眼压力、温度耦合组分模型。该模型包括压力计算模型和温度计算模型 ,在压力模型计算中考虑了动能变化的影响 ,在建立温度分布模型时 ,假设井眼中传热为稳态传热 ,并考虑了摩擦生热对井眼温度分布的影响。计算压力、温度时 ,将井眼分成若干段 ,在每段采用压力、温度之间相互耦合 ,迭代法求解。将文中提出的模型和常用模型进行比较 ,显示文中模型具有较高的精度 ,用于凝析气井井眼压力温度分布的分析与计算 ,能够满足工程的要求

Computational Analysis of Borehole Pressure Drop and Temperature Drop for Gas Condensate Well

In gas condensate well designs and dynamic analysis,borehole pressure and the distribution of temperature are two important parameters.On the basis of fluid phase theory of gas condensate well and considering the interplay of pressure and temperature,coupling component model of borehole pressure and temperature for gas condensate well is established.The model includes pressure calculation model and temperature calculation model.In the pressure model calculation,the effect of kinetic energy change is considered and we also consider the effect of friction in the borehole temperature distribution model.In calculating pressure and temperature,we divided the wellbore to many sections.In every section of the objects,pressure and temperature are just the unknown factors.Using iteration should to solve it.In comparison with common model,the coupling component model has higher accuracy.It is used for analysis and calculation of borehole pressure and temperature distribution of gas condensate well.And it can meet the requirement of engineering.In this paper,the effect of gas production,gas-liquid ratio and pipe diameter etc.on downhole pressure and temperature is also analysed.