关于开发利用中深层地热取热不取水技术的思考  

Reflections on the Development and Utilization of Middle and Deep Geothermal Energy without Water Extraction

作　　者：张聚斌 邢晓森 李振雄 Zhang Jubin;Xing Xiaosen;Li Zhenxiong(Land Resources Exploration Center, Bureau of Geology and Mineral Exploration and Development of Hebei Province, Shijiazhuang Hebei 050081, China)

机构地区：[1]河北省地矿局国土资源勘查中心,河北石家庄050081

出　　处：《工程地球物理学报》2021年第3期400-408,共9页Chinese Journal of Engineering Geophysics

摘　　要：本次研究主要以中深层地埋管换热系统、异井抽灌换热系统和同井抽灌换热系统为基础,提出中深层地埋管“d”型井换热系统、异井抽灌换热系统双层热储开发模式和同井抽灌换热系统双层热储开发模式,并对三种换热系统的经济可行性进行对比分析。结果表明:异井抽灌系统经济性最好,同井抽灌系统次之,中深层地埋管换热系统最差;取热不取水系统不同于抽采取热系统,其不但会降低地层温度,存在井距、开采强度及冷堆积问题,而且在径流条件好的地区还可能存在冷迁移问题;为降低系统全寿命周期成本、提高系统能效和系统可持续性,可考虑系统分层取热模式。Based on the medium-deep buried pipe heat exchange system,the pumping-recharging heat exchange system in different wells and the pumping-recharging heat exchange system in the same well,this paper proposes the double-layer heat storage development mode of"d"type well heat exchange system,pumping-recharging heat exchange system in different wells and the double-layer heat storage development mode of pumping-recharging heat exchange system in the same well.And the economic feasibility of the three heat transfer systems is compared and analyzed.The results show that the pumping and irrigation system of different wells is the most economical,the pumping-recharging system in the same well is the second,and the buried pipe heat exchange system of middle and deep layers is the worst.The system of heat extraction without water extraction is different from the system of heat extraction,which not only reduces the formation temperature,but also has the problems of well spacing,mining intensity and cold accumulation,as well as the problems of cold migration in areas with good runoff conditions.In order to reduce the life cycle cost of the system,improve the system energy efficiency and system sustainability,the layered heat extraction mode can be considered.

关 键 词：中深层地热 取热不取水 中深层地埋管换热系统 异井抽灌系统 同井抽灌系统 

分 类 号：TK529[动力工程及工程热物理—热能工程]