油管掺液稠油泵井筒流体温度分布计算

根据传热学和能量平衡原理 ,考虑环空产出液与油管掺入液及地层之间的双重热传导作用 ,同时考虑了由流体相变导致的焦耳汤姆森效应 ,建立了稠油泵井筒流体温度分布数学模型 ,并研究了温度分布随时间的变化规律。编制了计算程序 ,该程序能用于计算任意生产时间及井筒深度下掺入液及产出液的温度。计算结果表明 ,在一定条件下 ,生产时间及焦耳汤姆森效应对井筒温度分布有明显的影响。

Calculation of fluid temperature distribution in wellbore with heavy oil pump

According to the theory of heat exchange and energy balance, an array of ordinary differential equation for calculating the fluid temperature distribution in the wellbore with heavy oil pump is established in consideration of the heat exchange between the produced fluid in the annular space and the the injected fluid from pipeline,as well as the Joule Tomphson effect caused by the phase change of liquid. The relationship of temperature distribution to production time is discussed. On the basis of the mathematical model, a computer program is designed. The calculation result shows that the program can be used to calculate conveniently the temperature distribution of mixed or produced liquid in any depth of wellbore at any time. The analysis on an application case demonstrates that the model and the calculation result are reasonable. The producing time and Joule Tomphson effect have the important effects on the fluid temperature distribuiotn in wellbore.