水热型地热群井周期性采热性能演化

Evolution of Periodic Thermal Recovery Performance of Hydrothermal Geothermal Multiple Wells

水热型地热资源是一种可再生能源,可开发用于建筑物供暖并能够有效节能减排。基于光纤实时传输技术和现场实际运行参数,结合数值模拟方法对水热型地热群井采热性能开展研究,分析地热群井长期开采过程中温度场动态演化规律和可持续供暖能力。结果表明:供暖期出水温度在整个生产过程中的波动情况均较为稳定,且最低温度可达到70.7℃;在整个开采周期内,储层内温度场的水平扰动最大范围为188.2 m,表明地热储层具有良好的可持续开采特征;30年开采周期内,地下水位最多下降了2.56 m,对当地的地下水环境影响较小;研究区地热开采系统的建筑可供暖面积介于1.82×10^(4)~4.86×10^(4)m^(2)之间,且在持续供暖周期内无明显衰减。

Hydrothermal geothermal resources are a renewable energy source that can be developed for building heating and can effectively save energy and reduce emissions.The thermal performance of hydrothermal geothermal wells was investigated based on real-time fiber optic transmission technology and actual on-site operating parameters combined with numerical simulation methods.The results indicate that the fluctuation of outlet temperature during the heating period is relatively stable throughout the production process,and the minimum temperature can reach 70.7℃.During the entire mining cycle,the maximum horizontal disturbance range of the temperature field within the reservoir is 188.2 m,indicating that the geothermal reservoir has good sustainable mining characteristics.During the 30-year mining cycle,the groundwater level has dropped by a maximum of 2.56 m,with minimal impact on the local groundwater environment.The building heating area of the geothermal extraction system in the research area is between 1.82×10^(4)-4.86×10^(4)m^(2),and there is no significant attenuation during the continuous heating cycle.