Abstract: A nuraierical method has been deueloped to investigate toansient wellbare heat tansfer.It is useful for hydraulic fracturing aeidizing in which the operating periods are short.The method is based on a modea proposed by Ei cknteier et al.Three improvements have been made.1.Allowauce for the loading liquid in the wellbore,which was neglected in the original model.2.A fully implicit method instead of the original explicit method is used art this paper to guarantee unecmditional stability.3.This method can be applied for three injection patterns,i.1.from tubing,from annulus and from both of them.It is more flexible and convenient for practical use.The calculation results agree well with the rxieasured data of two wells from Shengli and Daqing oil fields.

摘要： 本文提出了不稳态井简传热的一种新计算方法,适用于计算象压裂、酸化这种作业时间短井筒温度分布.此方法是在埃克梅尔等人计算方法基础上发展起来的.主要的改进有三个方面:(1)原方法未考虑作业前井筒中原有的积液,认为井筒是空的,这与事实不符.(2) 原方法使用了显式计算方法,不能保证数值解无条件稳定,本方法使用了全隐式解法避免了这个缺点.(3)为适应压裂作业的需要,本方法可应用于从油管、环形空间或从油管、环形空间同时注人的井筒溢度计算,比原方法更为灵活实用.用此方法计算了胜利油田3-6-328井和大港油田港314井在压裂过程中井底温度的变化,与实测结果比较一致,因此,此方法具有使用意义,为压裂酸化井简温度的计算提供了有效的方法.