黔西南地区地热储层结构特征——以望谟平洞地热储层为例  

Structural characteristics of geothermal reservoirs in southwest Guizhou:Taking Pingdong geothermal reservoir in Wangmo county as an example

作　　者：涂明江 赵良杰[2,3] 李强 陈刚[1] 王若帆[1] 王元坤[1] TU Mingjiang;ZHAO Liangjie;LI Qiang;CHEN Gang;WANG Ruofan;WANG Yuankun(114 Geological Brigade of Guizhou Geological and Mineral Explaration and Development Bureau,Zunyi,Guizhou 563000,China;Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR/International Research Center on Karst under the Auspices of UNESCO,Guilin,Guangxi 541004,China;Pingguo Guangxi,Karst Ecosystem,National Observation and Research Station,Pingguo,Guangxi 531406,China;Guizhou University,Guiyang,Guizhou 550000,China)

机构地区：[1]贵州省地质矿产勘查开发局114地质大队,贵州遵义563000 [2]中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心,广西桂林541004 [3]广西平果喀斯特生态系统国家野外科学观测研究站,广西平果531406 [4]贵州大学,贵州贵阳550000

出　　处：《中国岩溶》2024年第1期84-91,共8页Carsologica Sinica

基　　金：贵州省地质矿产勘查开发局地质科研项目(黔地矿科合[2020]23号);贵州省地质勘查基金项目“贵州省水文地质志修编”(DKJJ2021-01号)。

摘　　要：基于地温梯度的地热资源开发受区域地热储层结构及导水构造控制。文章以贵州省望谟县平洞地热储层为研究对象,依据地质调查和ZK1钻孔揭露的地热储层结构为依据,分析区内热储层岩性特征、热储构造、导水构造、地温场特征、地热流体水化学特征,以深入理解地热流体循环机制。研究表明:研究区地处上里地背斜倾伏端,地热流体接受大气降水补给,沿裂隙、断裂带进入深循环并汇集于热储层及断层破碎带,径流过程主要受断裂构造控制,显示出典型的褶皱隆起断裂对流型特征;区内地下水化学类型为HCO_(3)-Ca·Mg型;地热流体增温过程主要由地温梯度控制,平均地温梯度值为2.34℃·(100 m)^(-1),热储构造和导水构造对增温促成也有一定影响。研究成果可为黔西南地区及其他类似地热储层的地热能开发提供参考。As future advantageous resources as well as renewable energy sources,geothermal resources are widely distributed and used due to their large reserves.They are also clean,environmental and recyclable.Therefore,the development and utilization of geothermal resources has become an important means of global energy transformation and mitigation of global warming.In this context,understanding the dynamics of geothermal fluid movement and the distribution characteristics of geothermal resources in the study area becomes important before the development of these resources.Such knowledge is essential for harnessing the full potential of geothermal energy in the area under consideration.The development of geothermal resources based on geothermal temperature gradients is controlled by regional geothermal reservoir structures and water-conducting structures.In order to gain a deeper understanding of the circulation mechanism of the geothermal fluids in the study area,this study takes Pingdong geothermal reservoir in Wangmo county of Guizhou Province as the research object,and analyzes the lithological characteristics,thermal reservoir structures,water-conducting structures,characteristics of geothermal fields,and hydrochemical characteristics of geothermal fluids in this area on the basis of the geological survey and the structural characteristics of geothermal reservoir exposed by ZK1 borehole.The results show that the study area is located at a national key metallogenic zone−the Youjiang rift of Jiangnan composite orogenic belt at the north of Youjiang metallogenic zone,i.e.Shangli geoanticlinal inclined end of the combination part of NW Wangmo fold belt in the foreland basin and the deformation area of EW Ceheng closed fold.The tectonic stress is concentrated in this area.Geothermal fluids in the study area receive atmospheric precipitation and are replenished along the distribution area of carbonate rock in the core of the Shangli geoanticline on the northwest side.Then they fall into deep circulation along the fissure

关 键 词：热储层结构 地温梯度 热水循环模式 望谟平洞地热系统 

分 类 号：P314[天文地球—固体地球物理学]