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建立三维水热耦合数值模拟模型,对不同地下水天然流动情况下,含水层采能过程中及采能后地温场的演化进行了模拟和分析。结果表明,对于地下水流动较为显著的地区,地温场的变化幅度不仅受地下水天然流速的影响,还与井位布局方向密切相关。区域地下水的天然流速越大,系统停运期抽水井的温度恢复速度越快;对于相同地下水天然流速,地下水流向沿抽水井指向回灌井比垂直于抽灌井对之间连线方向的情况,抽水井温度变化幅度要小。
A three-dimensional numerical simulation model of water-heat coupling was established to simulate and analyze the evolution of groundwater field during the process of natural aquifer waterlogging and natural groundwater flow. The results show that the change of geothermal field is not only affected by the natural flow velocity of groundwater, but also closely related to the well location direction for the areas where groundwater flow is more significant. The greater the natural flow rate of groundwater, the faster the temperature recovery of the pumping wells during the system shutdown. For the same natural flow velocity of groundwater, the direction of groundwater flow along the pumping wells is higher than that between the pumping wells and vertical wells , Pumping wells temperature changes to be small.