漯河地区新近系明化镇组热储回灌试验分析  

Analysis of geothermal storage reinjection test in Minghua Formation of Neogene in Luohe area

作　　者：宋仲科 李佳 李胜利 白西良 罗伊琳 黄波[5] 宋晓焱[4] 郑启明[5] Song Zhongke;Li Jia;Li Shengli;Bai Xiliang;Luo Yilin;Huang Bo;Song Xiaoyan;Zheng Qiming(Henan Yuzhong Geological Prospecting Engineering Co.,Ltd.,Zhengzhou 450018,China;Henan Energy Drilling Engineering Technology Research Center,Zhengzhou 450018,China;Henan Provincial Natural Resources Science and Technology Innovation Center(Research on Unconventional Natural Gas Development),Zhengzhou 450018,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Henan University of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南豫中地质勘查工程有限公司,河南郑州450018 [2]河南省能源钻井工程技术研究中心,河南郑州450018 [3]河南省自然资源科技创新中心(非常规天然气开发研究),河南郑州450018 [4]华北水利水电大学,河南郑州450046 [5]河南工程学院,河南郑州451191

出　　处：《能源与环保》2024年第8期140-144,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：河南省自然资源厅2022年度省自然资源科研项目(豫财招标采购-2022-266-09)。

摘　　要：地热回灌是维持地热资源可持续开采的重要途径,是预防地面沉降等地质环境问题的有效措施。为提高河南省漯河地区地热资源利用率,在该区开展回灌试验和数值模拟研究,分析影响回灌的主要因素。研究结果表明,研究区主要开采层新近系明化镇组热储回灌效果良好,回灌潜力较大,异层水源允许最大回灌量为26.761 m^(3)/h,同层水源允许最大回灌量为33.060 m^(3)/h。漯河地区异层水源回灌建议采用一采两灌的布井方式,同层水源回灌建议采用二抽三灌的布井方式,建议回灌井距为300 m。回灌量随回灌压力增大而增大,但单位回灌量和渗透系数随压力增大呈减小趋势,表明加压回灌可通过影响热储的渗透性能影响回灌量。回灌地热水温度越低,密度越大,对井底压力越大,回灌效果越好。Geothermal reinjection is an important way to maintain the sustainable exploitation of geothermal resources and an effective measure to prevent the geological environment problems such as land subsidence.In order to improve the utilization rate of geothermal resources in the Luohe area of Henan Province,reinjection tests and numerical simulation researches were carried out,and the main factors affecting reinjection were analyzed.Research results indicated that the Neogene system Minghuazhen Formation had good geothermal storage reinjection effect and great reinjection potential,and the maximum allowable reinjection volume for heterogeneous water sources was 26.761 m^(3)/h,and the maximum allowable reinjection rate for same layer water sources was 33.060 m^(3)/h.It was recommended to use a well layout of one extraction and two reinjections for the reinjections of heterogeneous water sources in the Luohe area,and a well layout of two extraction and three reinjections for the reinjection of same layer water sources.It was suggested to use a well spacing of 300 m for the reinjection.The reinjection amount increased with the increase of reinjection pressure,but the unit reinjection amount and permeability coefficient decreased with the increase of pressure,indicating that pressurized reinjection can affect the reinjection amount by affecting the permeability performance of geothermal storage.The lower the temperature and density of the geothermal water for reinjection,the greater the pressure at the bottom of the well,and the better the reinjection effect.

关 键 词：地热回灌 漯河地热田 孔隙型热储 影响因素 

分 类 号：P618.130.2[天文地球—矿床学]