中国地质2023，Vol.50Issue(6)：1632-1645,14.DOI:10.12029/gc20220304001
山西大同盆地北部地热地质特征及资源潜力
Geothermal geological characteristics and resource potential in the north of Datong Basin,Shanxi Province
摘要
Abstract
This paper is the result of geothermal survey engineering. [Objective]The Datong Basin is a Cenozoic rifted basin with superior geothermal geological conditions.But due to the scarcity of geophysical and drilling data in the basin,the research on the basin structure,sedimentary stratigraphy distribution,geothermal geological characteristics and resource evaluation is relatively weak,which partly restricts the understanding of the potential of the geothermal resources of the Datong Basin,as well as the exploitation and utilization of the geothermal resources.[Methods]In this paper,the new 2D seismic,regional geological survey,drilling and logging wells and other oil and gas and exploration data are comprehensively applied to carry out the research on the geological structure,fracture,sedimentary stratigraphy,and geothermal geological characteristics of the northern Datong Basin,and then evaluated the potential of geothermal resources,estimated the amount of geothermal resources,and pointed out the favorable zones of geothermal resources.[Results]The Datong Basin is divided into five tectonic units:the Huairen sag,the Sanganhe sag,the Yingxian sag,the Huanghualiang low uplift and the Sanganhe low uplift.The northern part of the basin(within Datong City)is characterized by good geothermal geological conditions and resource potentials,with the development of two sets of thermal reservoirs:Neocene sandstone and Basement rock,and a thick Quaternary thermal cover,and the Cenozoic is characterized by strong tensional and volcanic activities,and is generally at the high value of geothermal heat flow.The area is in the high value of geothermal flow,and has the potential of geothermal resources of Neocene sandstone and Basement rock,with a total static resource of about 68.8×1015 kJ,which is equivalent to about 2.347 billion tons of standard coal.[Conclusions]The comprehensive evaluation concludes that the western part of Huairen sag and the northern part of Sangganhe sag in Datong Basin are hydrothermal geothermal resource first-class areas,which are favorable target areas for geothermal exploration and development,with the buried depth of thermal reservoir more than 2000 m,the predicted average water temperature greater than 60℃,and the inflow volume of a single well up to 60 m3/h.The northeastern part of Huairen sag and the southwestern part of Sangganhe sag are geothermal resource second-class areas.The geothermal resources of Huanghualiang low uplift and Sangganhe low uplift area are relatively poor.关键词
地震勘探/地热资源/热储层/地热资源潜力评价/地热地质调查工程/大同断陷盆地/山西省Key words
seismic exploration/geothermal resources/thermal reservoirs/potential evaluation of geothermal resources/geothermal survey engineering/Datong fault depression basin/Shanxi Province分类
天文与地球科学引用本文复制引用
潘良云,孟令箭,孙福利,杨文军,张玮,任路,薛慧,周博,杨慧..山西大同盆地北部地热地质特征及资源潜力[J].中国地质,2023,50(6):1632-1645,14.基金项目
中国石油天然气股份有限公司冀东油田分公司"河北省唐山北部、山西省大同市地热资源综合评价"项目(JDYT-2021-JS-758)资助. Supported by the comprehensive evaluation project of Geothermal Resources in Northern Tangshan,Hebei Province and Datong,Shanxi Province(No.JDYT-2021-JS-758)by Jidong Oilfield Company of Petrochina Co.,Ltd. （JDYT-2021-JS-758）
