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枯竭油气藏储集库储热供暖耦合CO2封存性能分析

王延欣

王延欣. 枯竭油气藏储集库储热供暖耦合CO2封存性能分析[J]. 地质科技通报, 2024, 43(3): 12-21. doi: 10.19509/j.cnki.dzkq.tb20230628
引用本文: 王延欣. 枯竭油气藏储集库储热供暖耦合CO2封存性能分析[J]. 地质科技通报, 2024, 43(3): 12-21. doi: 10.19509/j.cnki.dzkq.tb20230628
WANG Yanxin. Performance analysis of thermal energy storage for space heating and CO2 sequestration in depleted oil and gas reservoirs[J]. Bulletin of Geological Science and Technology, 2024, 43(3): 12-21. doi: 10.19509/j.cnki.dzkq.tb20230628
Citation: WANG Yanxin. Performance analysis of thermal energy storage for space heating and CO2 sequestration in depleted oil and gas reservoirs[J]. Bulletin of Geological Science and Technology, 2024, 43(3): 12-21. doi: 10.19509/j.cnki.dzkq.tb20230628

枯竭油气藏储集库储热供暖耦合CO2封存性能分析

doi: 10.19509/j.cnki.dzkq.tb20230628
基金项目: 

中国石油化工集团有限公司项目“新能源与石化减碳的融合发展研究” JR22012

详细信息
    通讯作者:

    王延欣, E-mail: wangyanxinxxsy@163.com

  • 中图分类号: P314.2;TE357.7

Performance analysis of thermal energy storage for space heating and CO2 sequestration in depleted oil and gas reservoirs

More Information
  • 摘要:

    利用枯竭油气藏储存热能并封存CO2, 既可解决太阳能跨季节储热难题, 又可扩大可再生能源供暖占比, 同时还可提高CO2地质封存的经济性。提出了枯竭油气藏储热供暖耦合CO2封存的新方案, 以CO2作为循环工质, 夏季吸收太阳热量储存于油气藏背斜构造中, 而冬季取出供暖, 建立了储释能过程的数学模型, 重点分析了枯竭油气藏储能系统热工性能和CO2封存性能。结果表明: (1)新方案储能系统热工性能优异。单井平均采热功率4 808.95 kW, 每个采暖季可有效利用的平均储热量49 859.21 GJ, 平均能量储存密度28 984.23 kJ/m3。(2)CO2密度对温度敏感的特性降低了热损失, 提高了系统效率。枯竭油气藏储能系统平均能量回收效率95.84%, 平均热回收效率83.66%。(3)储能加速了CO2溶解。储释能过程中周期性的注入和采出工作气导致气液界面反复膨胀收缩, 增加了气水接触面积, 提高了传质动力, 加速了CO2在水中的溶解。对比储能模式和仅CO2封存模式, CO2溶解比例增量由0.26%上升至2.22%。枯竭油气藏储热供暖耦合CO2封存新方案既有优异的热工性能, 又加速了CO2的地质封存, 是一种高值化的枯竭油气藏利用和可再生能源供暖方案, 具有大规模推广应用的潜力。

     

  • 图 1  枯竭油气藏储热供暖及CO2封存系统图

    Figure 1.  System diagram of thermal energy storage for space heating and CO2 sequestration in depleted oil and gas reservoirs

    图 2  枯竭油气藏结构模型及参数

    Figure 2.  Structural model and parameters of depleted oil and gas reservoirs

    图 3  枯竭油气藏储能系统热工性能

    Figure 3.  Thermal performance of energy storage system in depleted oil and gas reservoirs

    图 4  枯竭油气藏储集库CO2储热季末物理参数数值模拟对比图

    a, b.第1和第20个储热季末密度场;c, d.第1和第20个储热季末温度场;e, f.第20个储热季末和采热季末气相CO2饱和度分布;g, h.第1和第20个储热季末压力场。Sg.气相CO2饱和度,下同

    Figure 4.  Comparison of numerical simulation of physical parameters of CO2 heat storage seasons in depleted oil and gas reservoirs

    图 5  储层中CO2溶解量

    Figure 5.  Dissolved CO2 in the reservoir

    图 6  储层中气相CO2饱和度和溶解度

    a, c.第20个储能季末;b, d.第20个采暖季末;e, f.仅CO2封存模式下第20个采暖季末。x(CO2)为气相CO2溶解度

    Figure 6.  CO2 saturation and solubility in gas phase in the reservoir

    表  1  枯竭油气藏储层和盖层参数

    Table  1.   Parameters of depleted oil and gas reservoirs and caprocks

    参数 储层数值 盖层数值
    水平渗透率/m2 1×10-13 1×10-19
    垂直渗透率/m2 1×10-13 1×10-19
    孔隙率 0.2 0.01
    比热容/(J·kg-1·K-1) 920 920
    导热系数(wet)/(W·m-1·K-1) 2.5 2.5
    导热系数(dry)/(W·m-1·K-1) 1.6 1.6
    密度/(kg·m-3) 2 650 2 650
    压缩系数/Pa-1 4.5×10-10 4.5×10-10
    盐度/(kg·kg-1) 0.01 0.01
    下载: 导出CSV
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  • 收稿日期:  2023-11-06
  • 录用日期:  2024-02-18
  • 修回日期:  2024-01-04

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