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| Numerical Simulation Analysis of Uranium In-situ Leaching in Sandstone Based on Fluid-Structure Interaction |
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Received:January 30, 2024
Revised:February 22, 2024
Accepted:February 26, 2024
Published Online:June 05, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.07.013 |
| KeyWord:fluid-structure interaction; effective stress; permeability; yield regularity; in-situ leaching of uranium |
| Author | Institution |
| ZHENG Yongxiang |
石家庄铁道大学 |
| ZHANG Ao |
石家庄铁道大学 |
| WANG Wei |
石家庄铁道大学 |
| WEI Haiyang |
石家庄铁道大学 |
| NIU Qinghe |
石家庄铁道大学 |
| YIN Chao |
石家庄铁道大学 |
| YANG Haotian |
石家庄铁道大学 |
| LEI Yun |
中煤科工集团沈阳研究院有限公司 |
| JIA Nan |
中煤科工集团沈阳研究院有限公司 |
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| Abstract: |
| In order to explore the production changes of uranium ore in low-permeability sandstone under different factors, a numerical model of effective stress-seepage was established according to the relationship between the effective stress and seepage characteristics of the reservoir. The daily water production was used to analyze the production variation of the reservoir under fluid-structure interaction, and the effects of injection pressure, initial permeability and well spacing on production were analyzed by combining the coefficient of variation method. The results show that the reservoir production will enter the stable state faster and the production will be higher under the consideration of fluid-structure interaction, and the greater the stress sensitivity coefficient, the more obvious the effect of the reduction of effective stress on the formation permeability. The greater the injection pressure, the greater the decrease in the area of the formation effective stress, and the increase in the area of formation permeability increases, resulting in a gradual increase in production. Under the consideration of fluid-structure interaction, the yield increases with the increase of initial permeability and the growth rate is faster. Under the consideration of fluid-structure interaction, with the increase of well spacing, the effect of decreasing effective stress between injection-production wells is weakened, and the increasing trend of permeability between injection-production wells is also decreased, resulting in a gradual decrease in production.Combined with the changes of the coefficient of variation of various factors, it can be obtained that the injection pressure has a more obvious effect on the yield effect. This study will help to establish a complete uranium production scheme for uranium in-situ leaching in low-permeability sandstone uranium mines. |
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