计算气井井筒温度分布的新方法

NEW METHOD OF CALCULATING WELLBORE TEMPERATURE IN GAS WELLS

气井井筒的温度分布计算对于气井设计及其动态分析具有重要意义，通过对井筒温度分布的预测，可以提高井筒压力预测的精度。在假设井筒中的传热为稳态传热，井筒周围地层中的传热为非稳态传热的条件下，根据能量守恒定律建立了计算气井井筒温度分布的数学模型用取自文献中的数据对所建模型进行验证，结果表明所建模型与实际情况吻合较好，能够满足工程的需要。

Knowing the temperature distribution in gas well is of great importance to gas well design and dynamic analysis; accurate prediction of wellbore temperature distribution can improve the accuracy of wellbore pressure prediction. Based on energy conservation law, a mathematical model for calculating wellbore temperature distribution in a gas well has been developed. This model assumes steady-state heat transfer inside the wellbore and transient heat transfer in the adjacent formation. Data from the literature are used to testify the validity of the model. Results indicate that the temperature distribution predicted by the model agrees well with the measured data.