Influence of water-rock interaction on permeability and heat conductivity of granite under high temperature and pressure conditions
文献类型：期刊论文
| 作者 | Yang, Fujian2,3; Wang, Guiling4; Hu, Dawei2,3; Zhou, Hui2,3; Tan, Xianfeng1 |
| 刊名 | GEOTHERMICS
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 100期号:-页码:- |
| 关键词 | Permeability characteristic Thermal conductivity capacity Water-rock interaction Granite Enhanced geothermal systems |
| ISSN号 | 0375-6505 |
| 英文摘要 | Water-rock interactions exist between the geothermal host rock (GHR) and the cold injected water for Enhanced (or Engineered) Geothermal Systems (EGS), changing permeability and thermal conductivity of GHR, influencing the heat extraction of EGS. Therefore, a water-rock interaction experiment is performed under high temperature and pressure conditions for heat-treated granite. The variation in permeability and thermal conductivity, mineral composition, and solution composition of the rock matrix is consequently analyzed, and their influence on the heat extraction of EGS is discussed. The thermodynamic analysis of the chemical processes of the experiment is presented using batch chemical simulators, PHREEQC 3.0, reproducing the chemical time series of the water rock reactions. Water-rock reaction changes the composition of the rock and the circulating fluid. For primary minerals, albite, anorthite, and k-feldspar dissolve, biotite tends to be stable, and quartz gradually increases. Secondary minerals, muscovite, calcite, kaolinite, and chlorite, are formed in our simulation results, and their source and generation mechanisms are discussed. However, the kaolinite and chlorite were not detected in the experiment due to their low quantity. Both the dissolution of primary mineral and the formation of secondary mineral change the permeability and the thermal conductivity of the granite. The permeability exhibits a transition from increasing to decreasing while the thermal conductivity shows an opposite variation. Both approach constant values but only at 60% of the initial value. However, from the long-term perspective, the change in permeability and thermal conductivity of the granitic host rock around the fracture will not exert a strong impact on the heat extraction of EGS. The test results in this context could facilitate our understanding of permeability characteristics and the evolution of thermal conductivity of a granitic host rock during the water rock interaction, and their influence on the heat extraction of EGS during the operation process. |
| 学科主题 | Energy & Fuels ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000773057300001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35272]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Shandong Province Lunan Geo-engineering Investigation Institute, Jining 272100, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, Hebei, 050061, China |
| 推荐引用方式 GB/T 7714 | Yang, Fujian,Wang, Guiling,Hu, Dawei,et al. Influence of water-rock interaction on permeability and heat conductivity of granite under high temperature and pressure conditions[J]. GEOTHERMICS,2022,100(-):-. |
| APA | Yang, Fujian,Wang, Guiling,Hu, Dawei,Zhou, Hui,&Tan, Xianfeng.(2022).Influence of water-rock interaction on permeability and heat conductivity of granite under high temperature and pressure conditions.GEOTHERMICS,100(-),-. |
| MLA | Yang, Fujian,et al."Influence of water-rock interaction on permeability and heat conductivity of granite under high temperature and pressure conditions".GEOTHERMICS 100.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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