兰州彭家坪砂岩型热储地热尾水回灌试验结果分析与启示  

Analysis and Insights of the Experiment Results of Geothermal Tail WaterReinjection in Sandstone-type Thermal Storage at Pengjiaping, Lanzhou

作　　者：李皓东 朱俊宇 王辉 刘文辉 刘行祥 李松 LI Hao-dong;ZHU Jun-yu;WANG Hui;LIU Wen-hui;LIU Xing-xiang;LI Song(Second Geological and Mineral Exploration Institute of Gansu Provincial Geological and Mineral Explorationand Development Bureau,Lanzhou 730020,China;Gansu Hydrogeology and Engineering Geological Survey Institute Co.,Ltd.,Lanzhou 730020,China;Gansu Provincial Geothermal Resources Exploration and Development Technology Innovation Center,Lanzhou730020,China)

机构地区：[1]甘肃省地质矿产勘查开发局第二地质矿产勘查院,兰州730020 [2]甘肃水文地质工程地质勘察院有限责任公司,兰州730020 [3]甘肃省地热资源勘查开发技术创新中心,兰州730020

出　　处：《科学技术与工程》2025年第11期4438-4447,共10页Science Technology and Engineering

基　　金：甘肃省科技计划(22YF11GA320);甘肃省地矿局2021年度创新项目(2021CX06)。

摘　　要：地热尾水回灌是目前制约兰州盆地地热资源开发利用的主要瓶颈。为了突破兰州盆地砂岩型热储地热尾水回灌的技术空白,依托兰州市彭家坪地热供暖示范工程,首次设计开展了15、20、25、28 m3/h的梯级流量自然回灌试验和0.1、0.2、0.3、0.4、0.5、0.6 MPa的梯级压力加压回灌试验,首次取得了兰州盆地彭家坪砂岩型热储最大稳定自然回灌量27.96 m3/h、加压0.667 MPa的稳定回灌量为51.68 m3/h的成果参数,并研究了地热尾水回灌对采水井水位、水温和温度场的影响。经过一个供暖季的生产性回灌试验验证,在兰州盆地成功探索出了一套适宜、可行的砂岩型热储地热尾水回灌技术工艺,对兰州盆地地热资源规模化高质量开发利用具有重要的参考和借鉴意义。Geothermal tail water reinjection is the main bottleneck that restricts the development and utilization of geothermal resources in Lanzhou Basin.In order to break through the technological gap of geothermal tail water reinjection in Lanzhou Basin sandstone-type thermal storage,relying on the geothermal heating demonstration project in Pengjiaping,Lanzhou City,for the first time,the natural reinjection experiment with graded flow rates of 15,20,25,28 m 3/h and graded pressure pressurised reinjection experiment of 0.1,0.2,0.3,0.4,0.5,0.6 MPa were designed and carried out,the maximum stable natural reinjection volume of 27.96 m 3/h and the stable reinjection volume of 51.68 m 3/h for 0.667 MPa pressure were firstly obtained from the sandstone-type thermal storage of Pengjiaping,Lanzhou Basin,and the impact of geothermal tail water reinjection on the water level,water temperature,and temperature field of the extraction wells was also investigated.After a heating season of productive reinjection experiment verification,a set of suitable and feasible sandstone-type thermal storage geothermal tail water reinjection technology process has been successfully explored in Lanzhou Basin,which is of great reference and significance for the large-scale and high-quality development and utilization of geothermal resources in Lanzhou Basin.

关 键 词：兰州盆地 砂岩型热储 回灌试验 回灌技术工艺 

分 类 号：P314[天文地球—固体地球物理学]