Numerical simulation of operating parameters of CO<sub>2</sub> plume geothermal system in high temperature gas field

WEI Juyan; FU Meilong; FANG Li; LI Xudong

doi:10.16152/j.cnki.xdxbzr.2025-05-010

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Numerical simulation of operating parameters of CO₂ plume geothermal system in high temperature gas field

更新时间：2025-10-31

- Numerical simulation of operating parameters of CO₂ plume geothermal system in high temperature gas field
- Journal of Northwest University (Natural Science Edition) Vol. 55, Issue 5, Pages: 1065-1073(2025)
- 作者机构：
  
  长江大学　石油工程学院/油气钻采工程湖北省重点实验室，湖北　武汉　430100
- 作者简介：
- 基金信息：
- DOI：10.16152/j.cnki.xdxbzr.2025-05-010
  CLC： TK521
- Received：16 June 2024，
  
  Published：25 October 2025
- 稿件说明：
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WEI Juyan, FU Meilong, FANG Li, et al. Numerical simulation of operating parameters of CO₂ plume geothermal system in high temperature gas field[J]. Journal of northwest university (natural science edition), 2025, 55(5): 1065-1073.
DOI：

WEI Juyan, FU Meilong, FANG Li, et al. Numerical simulation of operating parameters of CO₂ plume geothermal system in high temperature gas field[J]. Journal of northwest university (natural science edition), 2025, 55(5): 1065-1073. DOI： 10.16152/j.cnki.xdxbzr.2025-05-010.

摘要

针对高温废弃气藏地热资源提取的问题，以某高温气田为目标热储，通过COMSOL软件建立以CO

为工作流体的井储耦合模型，分析热虹吸效应，分别改变CO

循环速率和井筒直径，观察注入井和生产井的压力变化及研究系统运行参数对采热性能的影响。研究表明：CO

循环速率对于热虹吸效应的影响十分显著，较小的井筒直径产生的热虹吸效应更强；较高的注入温度，导致系统运行后期生产流体温度下降缓慢，同时系统采热速率较低；较大的注入流量，导致生产流体温度快速下降；较大注采井距可减少生产流体温度的波动幅度，并使采热速率稳定阶段时间增长等。研究给未来CO

羽流地热系统进行深部地热能开采提供参考意义。

Abstract

Aiming at the extraction of geothermal resources from high-temperature waste gas reservoirs

the article takes a high-temperature gas field as the target thermal storage

establishes a well-storage fully coupled model with CO

as the working fluid through COMSOL software

analyses the thermosiphon effect

changes the CO

circulation rate and the diameter of the wellbore respectively

and observes the pressure changes in the injection wells and the production wells

as well as researches the influence of the system operation parameters on the performance of the heat extraction. The study shows that the CO

circulation rate has a significant effect on the thermosiphon effect

with smaller wellbore diameters producing a stronger thermosiphon effect. Higher injection temperatures result in a slow decline in the temperature of the production fluid in the later stages of system operation

along with a lower rate of system heat recovery. Larger injection flow rate leads to a rapid decrease in the temperature of the producing fluid. Larger injection and extraction well spacing reduces the fluctuation amplitude of the temperature of the producing fluid and increases the time of the stabilisation phase of the heat recovery rate. The study provides reference significance for the future CO

-plume geothermal system to carry out deep geothermal energy extraction.

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references

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Numerical simulation of operating parameters of CO2 plume geothermal system in high temperature gas field

DOI：10.16152/j.cnki.xdxbzr.2025-05-010

摘要

Abstract

关键词

Keywords

references

Numerical simulation of operating parameters of CO₂ plume geothermal system in high temperature gas field