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在气井的日常管理及气井设计、动态分析中,井筒压力、温度分布是两个重要的参数.文章克服了以往文献在压力、温度计算上的不足,综合考虑了压力、温度之间的相互影响,建立了气井井筒压力、温度耦合分析模型.该模型包括压力计算模型和温度计算模型,在压力计算模型中考虑了动能变化的影响,在建立温度分布模型时,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,并考虑了摩擦生热对井筒温度分布的影响.在求解压力、温度分布之前,先将井筒分成若干段,然后求出相应段的物性参数.然而这些参数又是压力、温度的函数,而此时压力和温度却又是计算中需要求的未知数,由此可见压力和温度之间相互耦合,需采用迭代法求解,给出了进行迭代运算时计算温度初始值的方法.最后用四川气田6 口井的实测数据进行了验证,算例表明本模型计算方法简单,使用十分方便,且具有较高的精度,用于生产井及测试井井筒压力、温度分布的分析与计算,能够满足工程要求.“,”The distributions of the pressure and temperature in a wellbore are two important parameters in the management,design and dynamic analysis of gas wells.In this paper,a coupling analysis model for the pressure and temperature in gas well borehole is established through overcoming the shortcomings of previous articles in the pressure and temperature calculation and synthetically considering the interrelation between the pressure and temperature.This model is composed of pressure calculation model and temperature calculation one.For the pressure calculation model,the effect of kinetic energy change is considered.For the temperature distribution model,it is assumed that the heat transfer in wellbore is steady state one and that in the adjacent formations is transient one,and the effect of the heat caused by friction on the distribution of the temperature in wellbore is considered also.The whole wellbore is first divided into several intervals before the distributions of the pressure and temperature are calculated,and then,the physical property parameters of each interval are acquired.Because these parameters are also the functions of the pressure and temperature,whereas the pressure and temperature are the unknown numbers necessary to be acquired in the calculation,thus,it can be seen that the pressure and temperature are coupled with each other and it is necessary to use iterative method to solve them.The method for acquiring the initial value of the temperature in iterative calculation is given out in this paper.Finally,the model is verified by use of the practical data from 6 wells in Sichuan gas fields,which shows that the model is of a higher accuracy;its calculation method is simple and it is easy to be operated,thus it can satisfy the engineering needs in the analysis and calculation of the pressure and temperature distributions in producing and testing wells.