Quantitative study on vertical distribution of heat flow in Niutuozhen geothermal field, Xiong'an New Area−Evidence from heat flow determination in the Archean of D01 well  

作　　者：Ya-hui Yao Xiao-feng Jia Sheng-tao Li Jun-yan Cui Hong Xiang Dong-dong Yue Qiu-xia Zhang Zhao-long Feng 

机构地区：[1]Center for Hydrogeology and Environmental Geology,China Geological Survey,Tianjin 300304,China [2]Technology Innovation Center for Geological Environment Monitoring Engineering,MNR,Tianjin 300304,China [3]Tianjin Engineering Center of Geothermal Resources Exploration and Development,Tianjin 300304,China [4]School of Resource and Earth Science,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China [5]Chinese Academy of Geological Sciences,Beijing 100037,China

出　　处：《Journal of Groundwater Science and Engineering》2025年第1期22-33,共12页地下水科学与工程(英文版)

基　　金：funded by the National Key Research and Development Program(Grant Nos.2021YFB1507404 and 2018YFC0604305);the Project of China Geological Survey(Grant Nos.DD20221680,DD20189113,and DD20190127).

摘　　要：The karst geothermal reservoir in Xiong'an New Area is a representative example of an ancient buried hill geothermal system.However,published heat flow data are predominantly derived from the Cenozoic sedimentary cap.Due to the limited depth of borehole exploration,heat flow measurements and analyses of the Archean crystalline base-ment in the study area are rare.Further investigation of the heat flow and temperature field characteristics within the Archean crystalline basement beneath the karst geothermal reservoir is necessary to understand the vertical distribution of heat flow and improve the geothermal genetic mechanism in the area.The D01 deep geothermal scientific drilling param-eter well was implemented in the Niutuozhen geothermal field of Xiong'an New Area.The well exposed the entire Gaoyuzhaung Formation karst geotheremal reservoir of the Jixian system and drilled 1,723.67 m into the Archean crys-talline basement,providing the necessary conditions for determining its heat flow.This study involved borehole tempera-ture measurements and thermophysical property testing of core samples from the D01 well to analyze the vertical distri-bution of heat flow.The findings revealed distinct segmentation in the geothermal gradient and rock thermophysical prop-erties.The geothermal reservoir of Gaoyuzhuang Formation is dominated by convection,with significant temperature inversions corresponding to karst fracture developments.In contrast,the Archean crystalline basement exhibits conduc-tive heat transfer.After 233 days of static equilibrium,the average geothermal gradients of the Gaoyuzhuang Formation and the Archean crystalline basement were determined to be 1.5°C/km and 18.3°C/km,respectively.These values adjusted to-0.8°C/km and 18.2°C/km after 551 days,with the longer static time curve approaching steady-state condi-tions.The average thermal conductivity of dolomite in Gaoyuzhuang Formation was measured as 4.37±0.82 W/(K·m),3 and that of Archean gneiss as 2.41±0.40 W/(K·m).The average radioactive heat g

关 键 词：Heat flow vertical difference Archean crystalline basement Thermal conductivity Niutuozhen geothermal field Present-day temperature field Geothermal genetic mechanism D01 well 

分 类 号：P314[天文地球—固体地球物理学]