中文摘要：

根据正循环和反循环压井工艺特点,综合考虑轴向传热、径向传热、对流换热、摩擦做功生热等影响,建立了循环压井过程中井筒二维瞬态温度场预测模型,并采用有限差分法对预测模型进行数值求解。对实例井两种循环方式分别进行数值模拟得出：正循环压井井口排液温度大于反循环压井井口排液温度,循环压井过程中井底温度随压井时间先下降后逐渐稳定,正循环压井井底温度高于反循环压井井底温度。对排量、井深、注入温度、油管尺寸等4个重要影响因素进行敏感性分析,其对井筒温度的影响程度大小粗略排序为：井深、排量、油管尺寸、注入温度,为现场施工采取措施控制井筒温度的变化提供了理论依据。

英文摘要：

According to the characteristics of normal circulation and reverse circulation kills, considering the axial heat transfer, radial heat transfer, convection heat transfer and friction acting heat and the like, a two dimensional transient forecasting model of wellbore temperature field of circulation kill process was established. The prediction model has been solved by finite difference method. Wellbore temperature of normal circulation and reverse circulation kill were numerical simulated for a high-pressure deep well, the results show that wellhead drainages temperature in normal circulation killing is higher than that in the reverse circulation killing, and the bottomhole temperature first decreased quickly and then gradually reached stable during the killing time, finally, bottom temperature in normal circulation killing is higher than that in the reverse circulation kill. The effects of discharge capacity, well depth, inlet temperature and tubing size on the wellbore temperature field were analyzed. The analysis shows that： the influence degree in descending order of the four factors is well depth, discharge capacity, tubing size and inlet temperature, which provides theoretical references for wellbore temperature control in field operation.