摘要
循环钻井流体温度计算一直是钻井工作者希望解决的难题。建立了井眼温度传递数学模型,并通过对模型求解,给出了钻具内和环空流体温度计算解析式;利用该解析式结合超临界二氧化碳钻井流体的物理特性,对使用φ89mm钻头、φ31.8mm钻杆钻进的井眼中二氧化碳流体温度进行了计算,绘制了钻具内和环空二氧化碳流体温度剖面图;对比了在不同井深时和不同井眼尺寸条件下井眼内二氧化碳流体温度剖面图,发现随着井深的增加,钻具内二氧化碳流体更易进入超临界状态,且超临界二氧化碳钻井液更适合小井眼钻井。
Challenge of calculating circulation drilling fluid temperature was studied in this paper.Bore hole temperature transmission mathematics model was built up by the resolution of temperature transmission model,analytic formula of temperature calculation was given for fluid in drill-pipe and borehole annular.Using the analytic formula with physics character of supercritical CO2 drilling fluid,fluid temperature was calculated for the borehole with 89 mm bit and 31.8 mm drill-pipe,and the temperature profiles were carried out for fluid in drill-pipe and annular.According to temperature profiles in different depth,supercritical CO2 drilling fluid was easier transformed to supercritical state with increasing of depth,and it was better used in slim hole drilling.
出处
《钻井液与完井液》
CAS
2010年第6期1-3,共3页
Drilling Fluid & Completion Fluid
基金
石油科技中青年创新基金"超临界二氧化碳连续管钻井液携岩规律与调控方法研究"(06E1026)
中国石油大学研究生创新基金"超临界二氧化碳钻井液特性研究"(B2007-1)
关键词
井眼温度传递数学模型
超临界二氧化碳
钻井液
Bore hole temperature transmission mathematics model
Supercritical CO2
Drilling fluid
