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首页> 外文期刊>Renewable energy >Analysis and modeling of thermoelectric power generation in oil wells: A potential power supply for downhole instruments using in- situ geothermal energy
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Analysis and modeling of thermoelectric power generation in oil wells: A potential power supply for downhole instruments using in- situ geothermal energy

机译：油井热电发电的分析和建模：利用原位地热能的井下仪器的潜在电源

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摘要

With the increasing development of smart well technology in the oil and gas industry, there is a need for robust and reliable downhole power supply in order to provide stable power for downhole sensors and control tools. Usually, the produced fluid from the reservoir carries abundant thermal energy, which can be converted to electric power with thermoelectric technology. To realize in-situ power generation in the downhole environment, the design of downhole segmented concentric cylindrical thermoelectric generators (CCTEGs) with a cold fluid is proposed. A mathematical model for downhole thermoelectric generation is presented, which considers the heat transfer in the interior of thermoelectric element and from surrounding formation. The power performance in an oil well with 50% of water cut is investigated by using an engineering equation solver program. Numerical results show that about 800 W of power output could be obtained with 200 m length of segmented CCTEG, which is enough to provide power for typical downhole applications. The length of the segmented CCTEG and the injection rate of cold fluid dominantly affect the power output. The power consumption requirement for downhole applications in different operation periods could be met by simply adjust the injection rate of cold fluid. (C) 2019 Elsevier Ltd. All rights reserved.
机译：随着石油和天然气工业中智能井技术的不断发展，需要鲁棒且可靠的井下电源，以便为井下传感器和控制工具提供稳定的电源。通常，来自储层的产出液携带大量的热能，可以通过热电技术将其转换为电能。为了在井下环境中实现现场发电，提出了一种采用冷流体的井下分段同心圆柱热电发电机（CCTEG）的设计。提出了一种用于井下热电发电的数学模型，该模型考虑了热电元件内部以及周围地层的热传递。使用工程方程求解器程序研究了含水率为50％的油井的动力性能。数值结果表明，分段CCTEG长度为200 m时，可以获得约800 W的功率输出，足以为典型的井下应用提供功率。分段CCTEG的长度和冷流体的注入速率主要影响功率输出。只需调整冷流体的注入速度，即可满足不同作业时期井下应用的功耗要求。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Renewable energy》 |2020年第5期|561-569|共9页
  • 作者

  • 作者单位

    China Univ Petr East China Sch Petr Engn Qingdao 266580 Peoples R China|China Univ Petr East China Minist Educ Key Lab Unconvent Oil & Gas Dev Qingdao 266580 Peoples R China;

    China Univ Petr East China Sch Petr Engn Qingdao 266580 Peoples R China;

    Univ Oklahoma Mewbourne Sch Petr & Geol Engn SEC 1362 100 E Boyd Norman OK 73019 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Downhole power generation; Thermoelectric technology; Cold source; Oil well; Downhole instrument and tool; Power supply;

    机译：井下发电;热电技术;冷源;油井;井下仪器和工具;电源供应;

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