Performance analysis of multi-well EGS system based on unique network structure-Voronoi fractures
文献类型：期刊论文
| 作者 | Shi, ChangShuai1,4,5; Fan, Shu1,4,5; Lv, YanXin1,4,5; Liu, Weiji1,4,5; Zhu, XiaoHua1,4,5; Gan, Quan3; Li, HaiBo2
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| 刊名 | GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
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| 出版日期 | 2023-06-01 |
| 卷号 | 34期号:-页码:- |
| 关键词 | EGS Voronoi Fracture networks Heat extraction performance Thermo-hydraulic-mechanical coupling |
| ISSN号 | 2352-3808 |
| 英文摘要 | Fracture network is an important factor in the utilization of geothermal energy, its composition and structure have an important influence on the development of geothermal energy. As a component of EGS system, fractures have various forms. Therefore, this paper studies the influence of fracture morphology on reservoir heat extraction. The Voronoi is used to describe the unique network structure and is applied to geothermal development system as a form of fracture network. Therefore, a THM coupled EGS model with Voronoi fractures is established to observe its thermal extraction performance. In present work, the effects of fracture block numbers, well length, well spacing, injection mass flow rate and injection temperature on the thermal extraction performance of EGS system are numerically investigated. The results show that the model has higher production temperature when the number of Voronoi blocks is 77, and the production temperature in the 30th year is 494.01 K. The influence of the change of well spacing on the production temperature of the model is more obvious than that of the change of well length. At the same time, the longer the well length, the smaller the injection pressure, the stronger the connectivity between the injection and production wells, and the narrower the end of the injection well in the temperature diagram. Furthermore, the increase of injection mass flow rate reduces the production temperature of the model, when the injection mass flow rate increases from 80 kg/s to 140 kg/s, the production temperature decreases from 494.01 K to 450.99 K. However, because the increase of the total injection mass flow rate, the large mass flow rate still has a high heat extraction ratio. The higher the injection temperature is, the smaller the pressure difference between injection wells and production wells is. The temperature changes the permeability and liquid viscosity of the reservoir, thereby reducing the pressure difference. In addition, with the increase of injection wells, the production temperature of the model increases, and the injection pressure decreases. However, the pressure difference between injection wells and production wells increases, indicating that the pressure of production wells is large, so the production cost increases. Therefore, in the actual production situation, reasonable selection of geothermal operation parameters should consider the operation cost and the difficulty of development.(c) 2023 Published by Elsevier Ltd. |
| 学科主题 | Energy & Fuels ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000968927400001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35319]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China 4.Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province, Chengdu, Sichuan 610500, China 5.Key Laboratory of Oil & Gas Equipment, Ministry of Education (Southwest Petroleum University), Chengdu, 610500, China |
| 推荐引用方式 GB/T 7714 | Shi, ChangShuai,Fan, Shu,Lv, YanXin,et al. Performance analysis of multi-well EGS system based on unique network structure-Voronoi fractures[J]. GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT,2023,34(-):-. |
| APA | Shi, ChangShuai.,Fan, Shu.,Lv, YanXin.,Liu, Weiji.,Zhu, XiaoHua.,...&Li, HaiBo.(2023).Performance analysis of multi-well EGS system based on unique network structure-Voronoi fractures.GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT,34(-),-. |
| MLA | Shi, ChangShuai,et al."Performance analysis of multi-well EGS system based on unique network structure-Voronoi fractures".GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT 34.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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