Study on Chemical Genesis of Deep Geothermal Fluid in Gaoyang Geothermal Field

Frontiers in Earth Science

Jie Li²  Guiling Wang³  Yifei Xing³  Zhao Liu⁵  Sihang Han⁵  Shaoyun Liu⁵  Haowen Yu⁵ 

[1] Chinese Academy of Geological Sciences, Beijing, China;Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, College of Water Sciences, Beijing Normal University, Beijing, China;Geothermal and Hot Dry Rock Exploration and Development Technology Innovation Center, Ministry of Natural Resources of the People’s Republic of China, Beijing, China;MNR Laboratory of Deep Geosciences and Exploration Technology, Ministry of Natural Resources of the People’s Republic of China, Beijing, China;School of Water Resources and Environment, Hebei GEO University, Shijiazhuang, China;

关键词: genesis mechanism;    deep geothermal fluid;    gaoyang;    water chemical characteristics;    thermal reservoir temperature;   

DOI  :  10.3389/feart.2021.787222

来源: DOAJ

【 摘 要 】

Geothermal resources are clean energy with a great potential for development and utilization. Gaoyang geothermal field, located in the middle of the raised area in Hebei province, China, is one of the three major geothermal fields in the Xiong’an New Area. With the development of the Xiong’an New Area, this geothermal field has become a research hotspot. According to the latest survey, the bottom-hole temperature of the D34 and D35 areas in the north of Gaoyang geothermal field is 149°C and 116°C, respectively, which indicates favorable target areas for geothermal exploitation The circulation mechanism and chemical origins of geothermal fluid are unclear in the Gaoyang geothermal field, which hinders the evaluation of geothermal resources in this region. Therefore, water chemistry and isotopic studies were performed on the Gaoyang geothermal fluid to understand the genesis of the Gaoyang geothermal field. Piper trigram and Na-K-Mg software were also used to explore the genesis of the underground hot water. Combined with stratigraphy and geothermal geology, it can be concluded that the primary hydrochemical type of the Gaoyang geothermal field is Na-HCO3·Cl. In the process of upward migration of geothermal water, leaching and cation alternating adsorption took place, and finally, high TDS geothermal water was formed. Our results are helpful for geothermal resource evaluation and utilization and provide scientific guidance for the sustainable development of geothermal resources.

【 授权许可】

Unknown