Study on the Influence of Geological Parameters of CO2 Plume Geothermal Systems

At present, there are relatively few studies on the exploitation of geothermal resources in depleted high-temperature gas reservoirs with carbon dioxide (CO2) as the heat-carrying medium. Taking the high-temperature gas reservoir of the Huangliu Formation in the Yingqiong Basin as the research objec...

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Bibliographic Details
Published in:Processes 2024-12, Vol.12 (12), p.2808
Main Authors: Song, Jifeng, Zheng, Huaan, Zhou, Yuxia, Liang, Yukai, Zeng, Qianyi, Fu, Meilong
Format: Article
Language:English
Subjects:
Brackish water
Carbon dioxide
Energy
Fault lines
Fractured reservoirs
Geology
Geothermal power
Geothermal resources
Global warming
Heat
Heat conductivity
Heat transfer
Heat treatment
High temperature gases
Low temperature
Numerical analysis
Parameter sensitivity
Permeability
Reservoirs
Sensitivity analysis
Simulation
Software
Temperature
Thermal conductivity
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Summary:At present, there are relatively few studies on the exploitation of geothermal resources in depleted high-temperature gas reservoirs with carbon dioxide (CO2) as the heat-carrying medium. Taking the high-temperature gas reservoir of the Huangliu Formation in the Yingqiong Basin as the research object, we construct an ideal thermal and storage coupling model of a CO2 plume geothermal system using COMSOL6.2 software to conduct a sensitivity analysis of geological parameters in the operation of a CO2 plume geothermal system. The simulation results show that, compared with medium- and low-temperature reservoirs, a high-temperature reservoir exhibits higher fluid temperature in the production well and a higher heat extraction rate owing to a higher initial reservoir temperature but has a shorter system operational lifetime; the influence of the thermal conductivity of a thermal reservoir on the CO2 plume geothermal system is relatively minor, being basically negligible; and the thinner the thermal reservoir is, the faster the fluid temperature in the production well decreases and the shorter the thermal breakthrough time. These findings form a basis for selecting heat extraction areas for CO2 plume geothermal systems and also provide a theoretical reference for future practical CO2 plume geothermal system projects.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr12122808