摘要
地热资源的合理开发利用在推动能源结构转型、推进绿色清洁能源发展和实现新时代下“双碳”目标方面意义重大。眉县城区地下蕴藏着丰富的地热资源且开发潜力较大,但地热地质研究程度较低。从眉县城区地质构造、地层及热储层、地温场、水流场及水化学特征等方面综合分析,并总结了其地热水的赋存特征。结果表明,眉县城区热储层兼顾传导和对流的“二元聚热”特征,地热水属于中低温孔隙-裂隙复合地热系统,大地热流是地热水形成的“源”,区域深大断裂和次级断裂是地下热水补给和上涌的通道,同时接受地表水补给。热储层为蓝田-灞河组孔隙型砂岩热储和宽坪群裂隙型基岩热储及宽坪群基岩断裂带热储,热储层之间存在渗流和对流作用,具有一定的水力联系,区内较厚的第四系是良好的盖层。
The rational development and utilization of geothermal resources is of great significance in promoting the transformation of energy structure,advancing the development of green and clean energy and realizing the goal of“double carbon”in the new era.There are abundant geothermal resources in the underground of Meixian urban area with great exploitation potential,but the geothermal geological research degree is low.This paper analyzes and summarizes the occurrence characteristics of geothermal water in Meixian urban area from the characteristics of geological structure,strata and thermal reservoir,geothermal field,flow field and hydrochemistry.The results show that:The thermal reservoir in Meixian urban area is characterized by“dual heat accumulation”,which takes into account both conduction and convection.Geothermal water belongs to the composite geothermal system of medium and low temperature porosity and fracture.The ground heat flow is the“source”of geothermal water formation,and the regional deep and large faults and secondary faults are channels for underground hot water recharge and upwelling,while receiving surface water recharge.The thermal reservoir consists of porous sandstone thermal reservoir in Bahe Formation,and fractured bedrock thermal reservoir and bedrock fractured-zone thermal reservoir in Kuanping Group.There exists seepage and convection between the thermal reservoirs,and there is a certain hydraulic connection.The thicker Quaternary system in the area is a good cap layer.
作者
王伟
申小龙
刘军
贾志刚
宋一民
WANG Wei;SHEN Xiaolong;LIU Jun;JIA Zhigang;SONG Yimin(Shaanxi Coal Geology Investigation Resrarch Institute Co.,Ltd.,Xi’an 710021,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,MNR,Xi’an 710021,China)
出处
《陕西煤炭》
2024年第4期49-54,共6页
Shaanxi Coal
基金
陕西省煤田地质集团有限公司“关中西部城区地热能供暖系统集成与工程示范——眉县县城为例”(项目编号:SMDZ-2020-2)资助。
关键词
关中盆地
眉县城区
热储层
地热地质
地温场
赋存特征
Central Shaanxi Basin
Meixian urban district
thermal reservoir
geothermal geology
geothermal field
occurrence characteristics