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Analysis of temperature simulation in downhole reaction chamber of hydrothermal jet drilling
International Journal of Heat and Mass Transfer ( IF 5.0 ) Pub Date : 2018-08-01 , DOI: 10.1016/j.ijheatmasstransfer.2018.02.097
Zehao Lyu , Xianzhi Song , Gensheng Li , Yu Shi , Yu Liu

Abstract Hydrothermal jet is an alternative drilling method for the exploitation of oil and geothermal energy in deep hard formations. For the application of this novel technology, the successful generation of hydrothermal jet is very important. This paper focuses on investigating applications of different reaction, turbulence and radiation models to the supercritical water oxidation process in downhole reaction chamber of hydrothermal jet drilling. The objective is to identify the pros and cons of each model and determine a set of models that are the most appropriate for the reaction. Simulation models are tested and optimized through two different operating conditions. Simulation results are compared with experimental data. Results show that the entire space of the reaction chamber is in a high temperature state using the laminar finite rate model. The finite rate model is suitable for the simulation compared with other reaction models discussed. The Magnussen constant A and B in the finite rate model can be modified to be 7 and 0.5 to further reduce the error. In addition, the high temperature areas in k-omega model and SAS model are more concentrated, while they are more uniform in RNG k-epsilon model and standard k-epsilon model. The RNG k-epsilon model and DO or DTRM are the most appropriate turbulence and radiation models through comparison. Results in this paper can provide implications for the reaction simulation of hydrothermal jet drilling.

中文翻译:

热液喷射钻井井下反应室温度模拟分析

摘要 水热射流是深部硬地层开采石油和地热能的一种替代钻井方法。对于这项新技术的应用,成功产生热液射流非常重要。本文重点研究了不同反应、湍流和辐射模型在水热射流钻井井下反应室超临界水氧化过程中的应用。目标是确定每个模型的优缺点,并确定一组最适合该反应的模型。仿真模型通过两种不同的操作条件进行测试和优化。仿真结果与实验数据进行了比较。结果表明,使用层流有限速率模型,反应室的整个空间处于高温状态。与讨论的其他反应模型相比,有限速率模型适用于模拟。可以将有限速率模型中的马格努森常数 A 和 B 修改为 7 和 0.5,以进一步减小误差。此外,k-omega模型和SAS模型中的高温区域更加集中,而RNG k-epsilon模型和标准k-epsilon模型中的高温区域更加均匀。通过比较,RNG k-epsilon模型和DO或DTRM是最合适的湍流和辐射模型。本文的研究结果可为热液喷射钻井的反应模拟提供参考。可以将有限速率模型中的马格努森常数 A 和 B 修改为 7 和 0.5,以进一步减小误差。此外,k-omega模型和SAS模型中的高温区域更加集中,而RNG k-epsilon模型和标准k-epsilon模型中的高温区域更加均匀。通过比较,RNG k-epsilon模型和DO或DTRM是最合适的湍流和辐射模型。本文的研究结果可为热液喷射钻井的反应模拟提供参考。可以将有限速率模型中的马格努森常数 A 和 B 修改为 7 和 0.5,以进一步减小误差。此外,k-omega模型和SAS模型中的高温区域更加集中,而RNG k-epsilon模型和标准k-epsilon模型中的高温区域更加均匀。通过比较,RNG k-epsilon模型和DO或DTRM是最合适的湍流和辐射模型。本文的研究结果可为热液喷射钻井的反应模拟提供参考。通过比较,RNG k-epsilon模型和DO或DTRM是最合适的湍流和辐射模型。本文的研究结果可为热液喷射钻井的反应模拟提供参考。通过比较,RNG k-epsilon模型和DO或DTRM是最合适的湍流和辐射模型。本文的研究结果可为热液喷射钻井的反应模拟提供参考。
更新日期:2018-08-01
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