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实验室尺度高地温梯度模拟地层的实现方法研究

张德谦 雷海燕 戴传山

张德谦,雷海燕,戴传山. 实验室尺度高地温梯度模拟地层的实现方法研究[J]. 水文地质工程地质,2023,50(1): 152-157 doi:  10.16030/j.cnki.issn.1000-3665.202201050
引用本文: 张德谦,雷海燕,戴传山. 实验室尺度高地温梯度模拟地层的实现方法研究[J]. 水文地质工程地质,2023,50(1): 152-157 doi:  10.16030/j.cnki.issn.1000-3665.202201050
ZHANG Deqian, LEI Haiyan, DAI Chuanshan. Simulation achievement of lab-scale formations with high geotemperature gradient[J]. Hydrogeology & Engineering Geology, 2023, 50(1): 152-157 doi:  10.16030/j.cnki.issn.1000-3665.202201050
Citation: ZHANG Deqian, LEI Haiyan, DAI Chuanshan. Simulation achievement of lab-scale formations with high geotemperature gradient[J]. Hydrogeology & Engineering Geology, 2023, 50(1): 152-157 doi:  10.16030/j.cnki.issn.1000-3665.202201050

实验室尺度高地温梯度模拟地层的实现方法研究

doi: 10.16030/j.cnki.issn.1000-3665.202201050
基金项目: 国家重点研发计划项目(2018YFC0604305)
详细信息
    作者简介:

    张德谦(1996-),男,硕士研究生,主要从事地热能开发利用方面的研究。E-mail:marble@tju.edu.cn

    通讯作者:

    雷海燕(1974-),女,博士,副教授,主要从事地热能开发利用方面的研究。E-mail:leihy@tju.edu.cn

  • 中图分类号: P341

Simulation achievement of lab-scale formations with high geotemperature gradient

  • 摘要: 地热井与周围热储层的传热过程对地热井产热性能研究有重要意义。由于实际工程中在地热井周边布置测点较难,无法获取地热井周围热储层的参数变化,进而为地热热储模拟结果提供验证,故以往大多地热热储模拟仅将地热井作为源项处理,未考虑地热流体和储层的耦合流动换热。实验室条件下的模拟试验方便布置测点,可为热储-井筒耦合流动传热模型提供试验验证,其中如何实现实验室尺度下有温度梯度的模拟地层是试验研究的关键,目前尚未有类似研究。基于传热学基本原理,研究了实验室条件下有较高温度梯度多孔地层的快速实现方法,通过确定模拟热储层和热储盖层几何尺寸、优选填充多孔介质和实现恒定温度的模拟热储层,设计了一套实验室尺度下有高温度梯度的模拟地层系统,通过分层加热与边界动态热补偿方法,较快实现了热储层温度分别为60 ,65,70 °C下模拟地层的线性温度分布,采用有限体积法得到的数值模拟与试验结果的相对误差在±2.5%范围内,二者吻合较好。文章设计搭建的模拟地层系统可为开展地热井筒-热储耦合模拟试验提供条件,进而为开发的地热热储-井筒耦合传热数值软件提供试验验证。
  • 图  1  试验系统图

    Figure  1.  Schematic diagram showing the experimental system

    图  2  模拟饱和热储层

    Figure  2.  Simulated geothermal reservoir

    图  3  不锈钢波纹盘管布置

    Figure  3.  Layout of stainless coil

    图  4  加热盘管进出口处温度测点布置

    Figure  4.  Temperature measurement points at the inlet/outlet of coil

    图  5  热储盖层内径向温度测点布置

    Figure  5.  Layout of radial temperature measurement point

    图  6  热储盖层温度变化

    Figure  6.  Change in temperature of reservoir caprock with time

    图  7  热储盖层高度方向温度分布(Tr=65 °C)

    Figure  7.  Change in temperature of the caprock with height (Tr=65 °C)

    图  8  不同温度梯度下的盖层温度分布(r=0.07 m)

    Figure  8.  Temperature profile of reservoir caprock under different geotemperature gradients (r=0.07 m)

    图  9  热储盖层径向温度的数值和试验对比

    Figure  9.  Comparison of numerical and experiment results of caprock temperature at different radial distance

    图  10  热储盖层温度的相对误差随时间的变化

    Figure  10.  Change in relative error of the reservoir caprock temperature with time

    表  1  方解石砂砾热物性参数

    Table  1.   Thermophysical properties of calcite particles

    参数密度/(kg·m−3孔隙度比热容/(J·kg−1·°C−1导热系数/(W·m−1·K−1
    数值2 5740.451 230~1 2801.6~2.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-01-26
  • 录用日期:  2022-04-07
  • 修回日期:  2022-03-29
  • 网络出版日期:  2022-12-12
  • 刊出日期:  2023-01-13

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