摘要
德城区是鲁西北砂岩热储地热资源开采的主要地区,地热水开采是否对地面沉降造成影响尚未开展研究,这将直接影响地方政府对地热资源开发的决策及规范管理。根据土体固结理论,在相同固结条件下,同等水位降幅,热储层有效应力增量占该层自重应力的比值远低于深层地下水开采层有效应力增量占该层自重应力的比值。结合钻孔资料,认为该区热储层为泥质胶结,属半成岩状态,其可压缩性远低于深层地下水开采层。结合该区地热资源开采政策,通过分析已有的分层标监测数据,发现在现状开采条件下,该区砂岩热储地热水开采对地面沉降的影响不显著。
Decheng district is the main area of geothermal resources exploitation of sandstone thermal reservoir in northwest of Shandong Province.However,whether geothermal water exploitation will affect land subsidence has not been studied,which will directly affect the local government’s decision-making and standardized management of geothermal resources exploitation.According to the theory of soil consolidation,under the same consolidation conditions and the same decrease of water level,the ratio of effective stress increment to self-weight stress of thermal reservoir is much lower than that of deep groundwater exploitation layer.Combined with the drilling data,it is considered that the thermal reservoir in this area is a semi-diagenetic state with argilllic cementation,and its compressibility is far lower than that of deep groundwater exploitation.Based on the geothermal resource exploitation policy of this area,by analyzing the existing hierarchical standard monitoring data,it is found that the influence of geothermal water exploitation on land subsidence is not significant under the current mining condition.
作者
王明珠
万军伟
白通
刘毅
沈芳
WANG Mingzhu;WAN Junwei;BAI Tong;LIU Yi;SHEN Fang(No.2 Hydrogeology and Engineering Geology Brigade,Shandong Exploration Bureau of Geology and Mineral Resources(Lubei Geo-engineering Exploration Institute),Dezhou 253072,Shandong,China;Geothermal Resources and Reinjection Research Center of Shandong Province,Dezhou 253072,Shandong,China)
出处
《华东地质》
2021年第2期202-209,共8页
East China Geology
基金
山东省地质矿产勘查开发局“山东省地面沉降综合评价(编号:HJ201922)”项目资助。
关键词
砂岩热储
地热水开采
地面沉降
德城区
sandstone geothermal reservoir
geothermal water exploitation
land subsidence
Dezhou district
