Open AccessSpatial structure and resource potential of heat storage in Nanmeng geothermal field
Author(s) -
Xiaowei Zhang,
Yichen Wang,
Zhou Jiang,
Jianmin Li,
Jun Zhu,
Lisha Zhao,
Yingchao Jia
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/766/1/012042
Subject(s) - geothermal gradient , geology , petroleum engineering , geothermal energy , groundwater recharge , resource (disambiguation) , geothermal heating , petrology , hydrology (agriculture) , geophysics , geotechnical engineering , groundwater , aquifer , computer network , computer science
The geothermal conditions in Jizhong Depression are superior, and the area has many years of geothermal development history at present. Nanmeng geothermal field is located in the dominant area of geothermal resources in Jizhong depression, most of which is suitable for large-scale geothermal development. The main reservoirs in Nanmeng geothermal field include pore sandstone reservoirs of Neogene Guantao Formation and bedrock reservoirs of Jixian System. The Jixian System is the main thermal reservoir in the region, with a buried depth of 2000-4000 meters, a thickness of 500-700 meters, and a heat storage temperature of 70-105°C. It is characterized by large amount of water, good water quality and easy recharge of reservoirs. According to the difference of overlying strata structure, the buried depth of the main reservoirs in Nanmeng geothermal field gradually increases from south to north. In this paper, the annual geothermal recoverable resource of Nanmeng geothermal field is calculated as 0.3 × 10 16 J by the heat storage method, and the produced water temperature and the dynamic fluid level of the produced water are analyzed by the numerical simulation method. Finally, the most favorable well spacing of Nanmeng geothermal field is determined as 4A, which lays a foundation for the geothermal resource planning and development in Nanmeng.