对常规注水泥温度场预测方法的评价

为了对常规注水泥温度场预测方法进行研究评价,分析了API方法和一些常用的经验方法,并对API公布的数据和国内首次实测的大量井下循环温度实际数据进行了对比,结果表明:常规预测温度的方法其平均相对误差均高于5%;虽然对于不同井深和不同的循环时间条件可以采用不同的经验系数由地层静止温度(BHST)来估计井下循环温度,但该方法受到地区和各种因素的限制,时常与实际差别较大,不可能很好地满足钻井和固井施工的要求。要获取更准确的井下温度分布,应加强对本地区井下循环温度的实测和热交换过程的计算机模拟研究。

EVALUATION of THE PREDICTING METHOD OF TEMPRATURE FOR CONVENTIONAL CEMENTING

It is important for accurate prediction of bottom-hole circulating temperature (BHCT) to be got in drilling, completion and cement slurry design. In this paper, it was compared the downhole circulating temperature of API abroad with the actual testing data at home. The results show that the mean relativeerror exceeds 5 percentage of the conventional predicting temperature, the temperature can be evaluated with different empirical coefficients under arbitrary depth of well, and at any circulating time. Although the method is simple, it can not satisfy the requirement for the drilling and cementing construction. In order to obtain the exact temperature distribution, the researchers should be further to test the downhole circulating temperature, at the same time, to simulate the heat transfer process by computer.