天津滨海地热田北部深部地热资源赋存规律  

The occurrence regularity of deep geothermal resources in the northern of Binhai geothermal field,Tianjin

作　　者：唐永香[1,2] 林建旺 李嫄嫄[1] 阮传侠[1] 张雪梅[1,2] 赵娜[1] 刘志龙 张芬娜[1] 李哲[1] 栾鹏宇[2,3] 王世豪 刘文杰 TANG Yongxiang;LIN Jianwang;LI Yuanyuan;RUAN Chuanxia;ZHANG Xuemei;ZHAONa;LIU Zhilong;ZHANG Fenna;LI Zhe;LUAN Pengyu;WANG Shihao;LIU Wenjie(Tianjin Geothermal Exploration and Development Design Institute,Tianjin 300250,China;Key Laboratory of Geological Safety of Coastal Urban Underground Space,Ministry of Natural Resources,Qingdao Shandong 266100,China;Qingdao GeoEngineering Surveying Institute(Qingdao Geological Exploration Development Bureau),Qingdao Shandong 266100,China)

机构地区：[1]天津地热勘查开发设计院,天津300250 [2]自然资源部滨海城市地下空间地质安全重点实验室,山东青岛266100 [3]青岛地质工程勘察院(青岛地质勘查开发局),山东青岛266100

出　　处：《华北地质》2024年第1期77-84,共8页North China Geology

基　　金：自然资源部滨海城市地下空间地质安全重点实验室开放基金课题“天津滨海潜凸起地热异常区地热成因机理研究”(BHKF2023Z06);天津市规划和自然资源局项目“滨海新区深部地热调查评价”(国土房任[2015]5号)。

摘　　要：【研究目的】天津地热资源丰富,目前已开发的深部地热资源大部分位于“隆中凸”构造区域,而位于“坳中凸”构造区域的地热资源勘查和研究程度基本尚属空白,揭示其深部地热赋存规律可为滨海新区及京津冀地区寻找深部地热资源及勘探与开发提供重要参考。【研究方法】本文以黄骅坳陷宁河凸起中的桥沽地区为研究区,以近期新发现的资源禀赋最好的蓟县系雾迷山组热储层为研究对象,通过分析区域地质资料、大地电磁测深(MT)、钻孔测温和物探测井等资料,系统总结了研究区地质构造、地温场和深部地热资源赋存特征。【研究结果】雾迷山组储层的热储温度高(90~120℃),出水量大于100 m^(3)/h,埋藏相对较浅(2200~2800 m)。区内地质构造条件复杂,断裂构造发育,汉沽断裂为研究区重要的导热、导水通道;地温场呈现“两高夹一低”展布特征与两处背斜构造空间位置相对应;热源以壳源热为主、幔源热次之,大气降水为主要热水来源,热传输机制以热传导型为主。【结论】综合研究区深部地热赋存规律,建立了深部地热资源概念模型,明确了“坳中凸”深部地热找矿新思路。This paper is the result of the occurrence regularity of deep geothermal resources.[Objective]Tianjin has abundant geothermal resources.Currently,most of the developed deep geothermal resources are located in the"protrusion in uplift area"of structural area,while the exploration and research level of geothermal resources located in the"protrusion in depression area"of structural area is basically blank.Revealing the occurrence regularity of deep geothermal resources can provide important references for the exploration and development of deep geothermal resources in the Binhai New Area of Tianjin and Beijing-Tianjin-Hebei Urban Agglomeration.[Methods]Taking the Qiaogu area in the Ninghe Uplift of the Huanghua Depression as the research area,and the newly discovered Jixian Wumishan Formation as the research object.By analyzing regional geological data,magnetotelluric sounding(MT),borehole temperature measurement,and geophysical logging data,the geological structure,geothermal field,and the occurrence characteristics of deep geothermal resource in the study area are systematically summarized.[Results]The thermal temperature of the Wumishan Formation rangs from 90℃to 120℃,Water output exceeding 100 m^(3)/h,and the burial depth is relatively shallow,ranging from 2200 to 2800 m.The geological conditions in the area are complex,with well-developed fault structures.The Hangu Fault is an important channel of thermal and water conducting in the study area;The geothermal field exhibits a distribution feature of"low anomaly sandwiched between two high anomalies",which corresponds to the spatial location of two anticline structures;The heat source is mainly shell source heat,followed by mantle source heat,and atmospheric precipitation is the main source of hot water.The heat transfer mechanism is mainly heat conduction.[Conclusions]Based on comprehensive study on the occurrence patterns of deep geothermal resources in the research area,a conceptual model of deep geothermal resources has been established,and a new approach

关 键 词：地热田 “坳中凸”构造区域 雾迷山组 赋存规律 天津滨海新区 

分 类 号：P314[天文地球—固体地球物理学]