Embedded discrete fracture network method for numerical estimation of long-term performance of CO2-EGS under THM coupled framework
文献类型：期刊论文
| 作者 | Liao, Jianxing2; Hu, Ke2; Mehmood, Faisal4; Xu, Bin2; Teng, Yuhang5; Wang, Hong2; Hou, Zhengmeng3; Xie, Yachen1,3 |
| 刊名 | ENERGY
 |
| 出版日期 | 2023-12-15 |
| 卷号 | 285页码:16 |
| 关键词 | Embedded DFN CO2 -EGS THM coupling Thermal performance |
| ISSN号 | 0360-5442 |
| DOI | 10.1016/j.energy.2023.128734 |
| 英文摘要 | In enhanced geothermal system (EGS), the artificial fracture networks created by hydraulic fracturing provide highly conductive channel for heat extraction. Very complicated thermo-hydro-mechanical (THM) coupled processes will be involved during cold CO2 injection into the hot fractured reservoir. In this work, a new THM coupled approach is proposed for simulating the long-term performance of CO2-EGS based on embedded discrete fracture networks (DFNs). Due to significant temperature difference between the injection fluid and surrounding, the heat flow in fractures is governed by local thermal non-equilibrium theory. The THM coupling process is achieved by coupling the mechanical simulator FLAC3D and hydraulic-thermal simulator TOUGH2MP. The feasibility of proposed approach is verified and validated through comparing it with analytical solution and other method. The CO2 injection into a reservoir with stochastically generated DFNs is simulated for a period of 20 years, to study the flow behavior, fracture deformation, and thermal performance. The channeling flow is observed by streamlines of fluid and heat flow. The thermal stress due to temperature drop will enhance the fracture width, further decreasing the injection pressure, which shows the significance of incorporating the THM coupling effect in such high temperature reservoirs. This approach also enriches the tools for CO2-EGS simulation. |
| 资助项目 | National Natural Science Foundation of China[U22A20166] ; Guizhou Provincial Science and Technology Projects[QKHJC-ZK[2022]YB104] ; Guizhou Provincial Science and Technology Projects[QKHJC-ZK[2023]YB074] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001061701400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39375]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wang, Hong |
| 作者单位 | 1.Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Guizhou Univ, Coll Civil Engn, Guiyang 550025, Peoples R China 3.Tech Univ Clausthal, D-38678 Clausthal Zellerfeld, Germany 4.Univ Engn & Technol, Dept Petr & Gas Engn, Lahore 54890, Pakistan 5.China Construct First Grp Fifth Construct Co Ltd, Beijing 100024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liao, Jianxing,Hu, Ke,Mehmood, Faisal,et al. Embedded discrete fracture network method for numerical estimation of long-term performance of CO2-EGS under THM coupled framework[J]. ENERGY,2023,285:16. |
| APA | Liao, Jianxing.,Hu, Ke.,Mehmood, Faisal.,Xu, Bin.,Teng, Yuhang.,...&Xie, Yachen.(2023).Embedded discrete fracture network method for numerical estimation of long-term performance of CO2-EGS under THM coupled framework.ENERGY,285,16. |
| MLA | Liao, Jianxing,et al."Embedded discrete fracture network method for numerical estimation of long-term performance of CO2-EGS under THM coupled framework".ENERGY 285(2023):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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