浅层地热能开发回灌井施工技术研究--以郑州市东、西部新城区为例  

Drilling technology for recharge wells in shallow geothermal energy development—A case study of the new districts in the east and west of Zhengzhou

作　　者：王刚 宋佳 王盼盼 秦国强 WANG Gang;SONG Jia;WANG Panpan;QIN Guoqiang(No.2 Institute of Geo‑Environment Survey of Henan,Zhengzhou Henan 450053,China)

机构地区：[1]河南省地质矿产勘查开发局第二地质环境调查院,河南郑州450053

出　　处：《钻探工程》2022年第6期153-161,共9页Drilling Engineering

基　　金：郑州市财政项目“郑州市主城区、东部新城区、西部新城区浅层地热能调查评价”(编号:郑财招标采购-2020-439)。

摘　　要：地下水回灌是浅层地热能开发利用中不可缺少的环节,回灌井是实施回灌的关键设施,其施工技术是影响回灌效果的重要因素。选取郑州市东部新城区、西部新城区浅层地热能开发的回灌井为研究对象,分析不同区域地质条件的差异,通过回灌井结构分析地下水的回灌机理,论述影响回灌效果的因素。结合试验井施工情况,论述泥浆正循环钻进、泵吸反循环钻进、冲击钻进等不同钻进工艺的适用条件和施工中存在的问题,以及钢筋砼管、钢管和U-PVC管等不同成井管材对回灌效果的影响,探索提高单位回灌量的针对性措施,为今后郑州市及周边地区浅层地热能开发回灌井的施工提供参考。Groundwater recharge is an unavoidable step in shallow geothermal development and utilization.The reinjection well is the key facility to carry out reinjection,and its drilling technology is an important factor affecting the effect of reinjection.Taking the recharge wells for shallow geothermal development in the new districts of eastern and western Zhengzhou as the research objects,the differences in geological conditions in different regions are analyzed.The mechanism of groundwater recharge is analyzed in the perspective of the recharge well structure.The factors affecting the effect of reinjection are discussed.With regard to test well construction,this paper discusses the applicable conditions and problems of different drilling techniques,such as mud positive circulation drilling,pump suction reverse circulation drilling and percussive drilling,as well as the impact of the reinforced concrete pipe,steel pipe and U-PVC pipe and other different well pipes on the reinjection effect.To explore the targeted measures to increase the rate of unit recharge.It provides a reference for the construction of shallow geothermal development recharge wells in Zhengzhou and its surrounding areas.

关 键 词：浅层地热能 回灌井 回灌量 泵吸反循环钻进 

分 类 号：P634[天文地球—地质矿产勘探]