刘金璐,李军,柳贡慧,等. 深水固井循环阶段井筒温度场预测模型研究[J]. 石油钻探技术,2024,52(0):1-9. DOI: 10.11911/syztjs.2024065
引用本文: 刘金璐,李军,柳贡慧,等. 深水固井循环阶段井筒温度场预测模型研究[J]. 石油钻探技术,2024,52(0):1-9. DOI: 10.11911/syztjs.2024065
LIU Jinlu, LI Jun, LIU Gonghui, et al. Prediction Model of Wellbore Temperature Field during Deepwater Cementing Circulation Stage[J]. Petroleum Drilling Techniques, 2024, 52(0):1-9. DOI: 10.11911/syztjs.2024065
Citation: LIU Jinlu, LI Jun, LIU Gonghui, et al. Prediction Model of Wellbore Temperature Field during Deepwater Cementing Circulation Stage[J]. Petroleum Drilling Techniques, 2024, 52(0):1-9. DOI: 10.11911/syztjs.2024065

深水固井循环阶段井筒温度场预测模型研究

Prediction Model of Wellbore Temperature Field during Deepwater Cementing Circulation Stage

  • 摘要: 准确预测固井循环阶段井筒温度场有助于水泥浆性能参数的设计和井筒压力的计算,为此,基于井筒流动机理和传热学理论,考虑不同区域差异对传热过程的影响和不同流体热力学参数差异及其随井深变化的特点,结合流体界面位置描述方程,建立了一套适用于深水固井循环温度场的预测模型。利用2口井的实测数据对模型进行了验证,并对关键影响因素进行了规律分析。结果表明:水泥浆注入之前,钻井液应提前循环2~4周,以降低注入过程中循环时间的改变对井底循环温度的影响;水泥浆注入过程中,排量越大,周围环境的升温或降低作用越不明显;计算过程中若不考虑温度对比热容的影响,则预测的井底循环温度会偏高2~4 ℃;水泥浆密度对温度的影响规律与传热方向有关。研究结果对深水固井具有一定的指导作用。

     

    Abstract: Accurate prediction of wellbore temperature field during cementing circulation stage contributes to design cement slurry performance parameters and calculate wellbore pressure. Based on the wellbore flow mechanism and heat transfer theory, considering the influence of different regional differences on heat transfer process, the discrepancy of different fluid thermodynamic parameters and the characteristics of variation with well depth, combined with fluid interface position description equation, a set of temperature prediction model suitable for deepwater cementing circulation field was established. The model is verified by the measured data from two Wells, and the key influencing factors are analyzed. The results showed that the drilling fluid should be circulated for 2~4 weeks prior to injection to reduce the impact of circulation time changes on the BHCT (bottom hole circulating temperature) during injection. During the cement slurry injection process, the larger the displacement is, the less obvious the warming or lowering effect of the surrounding environment is. If the influence of temperature on specific heat capacity is not considered in the calculation process, it is predicted that the BHCT will be 2~4℃ higher. The influence of cement slurry density on temperature is related to the direction of heat transfer. The results of this study will be useful for field operations.

     

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