| 河间潜山地热资源开发方案数值模拟 |
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| 关键词:exploitation of geothermal resources numerical simulation geothermal field buried hill Hejian area |
| 基金项目:国家自然科学基金“渤海湾盆地挽近时期构造-热演化与有效热源机制”(编号: 42172334);国家重点研发计划课题“中国东部挽近时期热体制与深层高温地热聚集模式”(编号: 2021YFA0716003) |
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| Numerical Simulation of Buried Hill Geothermal Resources Exploitation in Hejian Area |
| Buried hill geothermal reservoirs have the advantages of large heat reservoirs and thickness, developed pores and cracks, and abundant geothermal water resources. The buried hills in the Jizhong depression are densely distributed and rich in geothermal resources. Hejian buried hill is located centrally to the east of Raoyang Sag in the Jizhong depression. The study area has excellent geothermal geological conditions and high potential for development and utilization. Logging data and thermophysical properties of rocks in the Hejian buried hill and its surrounding areas reveal that the present-day geothermal gradient ranges from 29.8 °C/km to 44.5 °C/km, with an average of 40.7 °C/km, and the terrestrial heat flow ranges from 64.8 mW/m2 to 80.6 mW/m2, with an average of 73.4 mW/m2. Based on the favorable areas of geothermal resources development, the temperature changes in the reservoir during geothermal reinjection are simulated using the hydrothermal coupled method to study optimization of exploitation operation. The reasonable distance between the production and rejection wells is 800 m, production mass flow rate is 60 L/s, reasonable reinjection water temperature is 35 °C, total production is 6.32×1016 J, annual production is 6.32×1014 J, and the annual geothermal resource can meet the indoor heating demand of 1.22×106 m2. This has guiding significance for the development and utilization of buried hill geothermal resources in the Jizhong Depression. |
| DING Rui,ZHU Chuan-qing,CAO Qian,FANG Chao-he,YANG Ya-bo,JIANG Xiao-xue.2023.Numerical Simulation of Buried Hill Geothermal Resources Exploitation in Hejian Area[J].Acta Geoscientica Sinica,44(1):248-256. |
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