敦煌盆地地热资源特征及开发利用方向  

Characteristics and development and utilization direction of geothermal resources in Dunhuang Basin

作　　者：高山 GAO Shan(The Fourth Geological Survey Institute of Gansu Bureau of Geology and mineral resources,Gansu Jiuquan,735000)

机构地区：[1]甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉735000

出　　处：《地下水》2025年第1期108-109,133,共3页Ground water

基　　金：甘肃省地矿局2022年度创新资金项目(2022CX08)。

摘　　要：在阐述区域地质背景的基础上,深度分析地热田地热地质条件,对地热资源成因及开发利用方向进行探讨。研究结果显示,敦煌盆地地热资源属沉积盆地传导型低温地热资源,热储层为新近系疏勒河组下段沉积的砂砾岩、砾岩。地热水主要来自南部山区大气降水补给,流体沿盆地地层间孔隙自南向北运移。热源主要来自于地球深部热传导。地热水水化学类型为Cl·SO4-Na型水,水温28.7℃~38℃,水中氟、锶平均含量达到理疗热矿水命名标准,可命名为氟水、锶水。同位素3H含量均<1.0TU,14C现代碳含量在百分数介于6.10±0.88~40.58±1.70之间,14C表观年龄介于7.46±0.35~23.24±1.20(ka)之间,证实敦煌盆地地热水是形成时间较早的“古水”。地热水经处理后可用于供暖、理疗、饮用天然矿泉水、生活热水等。研究成果可为勘查和开发利用敦煌盆地地热资源提供参考。On the basis of expounding the regional geological background,the geothermal geological conditions of geothermal field are deeply analyzed,and the genesis and development and utilization direction of geothermal resources are discussed.The results show that the geothermal resources in Dunhuang Basin belong to the conductive low-temperature geothermal resources of sedimentary basin,and the thermal reservoir is the glutenite and conglomerate deposited in the lower part of the Neogene Shulehe Formation.The geothermal water is mainly supplied by atmospheric precipitation in the southern mountainous area,and the fluid migrates from south to north along the interstratified pores of the basin.The heat source mainly comes from the deep heat conduction of the earth.The chemical type of geothermal water is Cl·SO 4-Na type,and the water temperature is 28.7℃~38℃.The average content of fluorine and strontium in the water reaches the naming standard of physiotherapy hot mineral water,which can be named as fluorine water and strontium water.The isotope 3H content is less than 1.0TU,the 14 C modern carbon content is between 6.10±0.88~40.58±1.70%,and the 14 C apparent age is between 7.46±0.35~23.24±1.20(ka),confirming that the geothermal water in the Dunhuang Basin was formed earlier.Ancient water.Geothermal water can be used for heating,physiotherapy,drinking natural mineral water,domestic hot water and so on after treatment.The research results can provide reference for the exploration and development of geothermal resources in Dunhuang Basin.

关 键 词：地热资源 地热成因 开发利用 敦煌盆地 

分 类 号：P314.1[天文地球—固体地球物理学] P641.8[天文地球—地球物理学]