中深层地下热水成生条件及勘查开发关键问题研讨  

Discussion on the key issues of genetic condition,exploration and development of medium and deep geothermal water

作　　者：汪力 袁金榜 杨筱寒 邓海涛 林肖荣 Wang Li;Yuan Jinbang;Yang Xiaohan;Deng Haitao;Lin Xiaorong(The Seventh Geological Brigade of Hubei Geological Bureau,Yichang,Hubei,443100,China)

机构地区：[1]湖北省地质局第七地质大队,湖北宜昌443100

出　　处：《化工矿产地质》2023年第2期157-163,共7页Geology of Chemical Minerals

基　　金：湖北省地质局2021年度科技项目“湖北省中深层地热聚敛成藏条件与勘查技术研究”子课题“鄂西地区中深层地热聚敛成藏条件与勘查技术研究”(编号:KJ2021-14)。

摘　　要：地下热水的成生和存储与特定的地质环境紧密相关,即必须具备“盖、储、补、滞、热”条件。其中“热”是地下热水成生的最重要条件之一,它主要来源于地球深部放射性同位素的蜕变及莫霍面尤其是康氏面以下至地核的熔融岩浆的热传导以及地球自转导致岩层间的摩擦放热等。作为液体矿产之一的地下热水,勘查井尤其是探采结合井除必须高度重视井位布设外,还应注重施工过程中岩屑(芯)录井、钻井循环液进出口温度和性状变化的观测以及井内地温测量等信息的收集与综合分析研究,这是查明热储层埋深与厚度、确定成井结构尤其是止水套管与滤水花管布置的重要依据。对单位产量小于5m3/d·m的探采井,应根据所在地的地理位置、开发利用前景等评价开发利用的可行性,将其评价为“适宜性差”更为合适。The generation and storage of geothermal water are closely related to specific geological environmental conditions,that is,it must have the conditions of"cover,storage,supplement,stagnation and heat"."Heat"is one of the most important conditions for the generation of thermal groundwater.It mainly comes from the radioactive isotope disintegration in the deep earth,the heat conduction of molten magma below the Moho Discontinuity,especially from the Conrad Discontinuity to the core,and friction heat release between rock layers caused by earth rotation.Thermal groundwater is one of the liquid minerals.Drilling well,especially combined with exploration and production,should not only attach great importance to the selection of drilling location,but also pay attention to collect,analysis and research information such as cuttings(core)logging,the temperature and property changes at the inlet and outlet of drilling circulating fluid and ground temperature measurement in well.The above data is an important basis for finding out the burial depth and thickness of the thermal reservoir,determining the well completion structure,especially the arrangement of water stop and filter pipe.For exploration and production wells with production less than 5m3/d·m,it is more appropriate to evaluate them as"poor suitability",according to the geographical location and development prospect to evaluate the feasibility of development and utilization.

关 键 词：地下热水 莫霍面与康氏面 岩屑录井 地温测量 适宜性差 

分 类 号：P314[天文地球—固体地球物理学] TD8[天文地球—地球物理学]