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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。
In order to research and evaluate the prediction method of temperature field of conventional cementing, the API method and some commonly used empirical methods are analyzed. The actual data of the API data published in China and the first large measured downhole temperature in China are compared. The results show that: The average relative error of temperature is higher than 5%. Although different empirical values can be used for different well depths and different cycle time conditions to estimate downhole temperature by the stratospheric resting temperature (BHST), the method is affected by regional and various The limitation of the factors is often different from the actual ones, so it is impossible to well meet the requirements of drilling and cementing construction. In order to get a more accurate temperature distribution downhole, we should strengthen the computer simulation of the actual measurement and heat exchange process of downhole circulating temperature in this area.