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首页> 外文期刊>Journal of natural gas science and engineering >Thermal effect on wellbore stability during drilling operation with long horizontal section
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Thermal effect on wellbore stability during drilling operation with long horizontal section

机译：水平截面较长的钻井作业中的热效应对井眼稳定性的影响

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In this study, a three-dimensional wellbore stability model is presented that takes into account thermal stresses combined with an integrated circulation temperature model for horizontal well drilling, the bottom hole temperature simulation were then validated using field measurements, and compared with results for vertical wells. A subsequent analysis of temperature sensitivity revealed that the heat source term, the length of horizontal section and mud specific heat were the main reasons cause the bottom hole temperature for horizontal wells rises above the static formation temperature. Results from the wellbore stability model show that the temperature variation magnitude in horizontal well is smaller than that in vertical wells, however, the effect of thermal stress on critical mud weight window in horizontal is more sensitive. The wellbore at toe of horizontal section is more stable than that at heel of horizontal section when the bottom hole temperature exceeds the static formation temperature. This research can provide a theoretical reference for enhancing overall operational efficiency and safety for horizontal well drilling. (C) 2015 Elsevier B.V. All rights reserved.
机译：在这项研究中，提出了一个三维井眼稳定性模型，该模型考虑了热应力并结合了用于水平井钻井的集成循环温度模型，然后使用现场测量验证了井底温度模拟，并将其与垂直井的结果进行了比较。随后的温度敏感性分析表明，热源项，水平断面长度和泥比热是导致水平井井底温度升至静态地层温度以上的主要原因。井筒稳定性模型的结果表明，水平井的温度变化幅度小于垂直井，但是，热应力对水平临界泥浆重量窗口的影响更为敏感。当井底温度超过静态地层温度时，水平断面的井眼比水平断面的井眼更稳定。该研究可为提高水平井钻井的整体作业效率和安全性提供理论参考。 （C）2015 Elsevier B.V.保留所有权利。

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