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建立以天津市滨海新区塘沽地区馆陶组孔隙性地热热储为研究区域的概念模型和数学模型,利用TOUGH2软件对533km~2区域内的20眼地热井的开采历史数据进行了数值模拟,计算结果与监测数据吻合较好。在此基础上,对单井开采模式下馆陶组热储层未来5年内温度场和压力场的变化趋势进行了预测;并针对下降趋势制定了回灌方案,分析不同回灌量对热储层温度场和压力场的影响程度。结果表明:单井开采模式下,未来5年内研究区水位年平均下降3.4m;当回灌率分别为60%和100%时,研究区年均水位相应下降1.3m和0.2m,有效缓解了单采模式下研究区内的水位下降速率。
A conceptual model and mathematic model of the Guantao Formation geothermal thermal storage in Tanggu area of Binhai New Area of Tianjin was established. The mining history data of 20 geothermal wells in 533km ~ 2 area were numerically simulated by TOUGH2 software, The results are in good agreement with the monitoring data. Based on this, the trend of temperature field and pressure field in Guantao Formation thermal reservoir in single-well mining mode are predicted in the next five years. Aiming at the downward trend, a scheme of recharging is formulated, and the effects of different recharge rates on heat storage Layer temperature and pressure fields affect the degree. The results show that in the single-well mining mode, the average annual water level in the study area will drop by 3.4m in the next five years. When the recharge rates are 60% and 100% respectively, the annual average water level in the study area will decrease by 1.3m and 0.2m respectively, effectively relieving The rate of water level drop in the study area in the single mining mode.