Capillary number effects on two-phase flow and residual oil morphology in water and supercritical CO2 displacement: A microfluidic study
文献类型：期刊论文
| 作者 | Li, Lian3,4; Kang, Yong3,4; Hu, Yi2,4; Pan, Haizeng1; Huang, Yong3,4; Yuan, Quan3,4 |
| 刊名 | ENERGY
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 316页码:15 |
| 关键词 | Capillary number Residual oil Two-phase flow Microfluidic chip Flow behavior |
| ISSN号 | 0360-5442 |
| DOI | 10.1016/j.energy.2025.134503 |
| 英文摘要 | The capillary number (Ca) is a key parameter that quantifies the balance between viscous and capillary forces during fluid flow in porous media, significantly influencing fluid behavior and residual oil morphology in enhanced oil recovery. In this study, water and supercritical CO2 flooding experiments were conducted using a microfluidic chip at 75 degrees C and 22 MPa. Two-phase flow and residual oil morphology under both water and supercritical CO2 flooding were compared and analyzed at different capillary number. The results show that, at the same capillary number, water flooding exhibits more fingering, while CO2 flooding displays more diffusive and unstable flow patterns. At high capillary numbers (lg Ca =-4.2), residual oil in water flooding is mainly in the form of emulsion, while in supercritical CO2 flooding, it is predominantly in droplet form. When the capillary number increases from-5.2 to-4.2, residual oil saturation decreases by 22.3 % in water flooding and 32.5 % in CO2 flooding. The oil recovery factor in CO2 flooding is 17.0 % higher than in water flooding at low capillary number conditions (lg Ca =-5.5), and 18.1 % higher at high capillary number conditions (lg Ca =-4.2). These findings provide valuable insights into the mechanism of capillary number on residual oil recovery efficiency. |
| 资助项目 | National Natural Science Foundation of China[52274093] ; National Natural Science Foundation of China[U24B2035] ; Knowledge Innovation Special Project of Wuhan[whkxjsj007] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001399700400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37292]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Kang, Yong |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 2.Wuhan Univ, Inst Technol Sci, Wuhan 430072, Peoples R China 3.Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Peoples R China 4.Wuhan Univ, Hubei Key Lab Waterjet Theory & New Technol, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Lian,Kang, Yong,Hu, Yi,et al. Capillary number effects on two-phase flow and residual oil morphology in water and supercritical CO2 displacement: A microfluidic study[J]. ENERGY,2025,316:15. |
| APA | Li, Lian,Kang, Yong,Hu, Yi,Pan, Haizeng,Huang, Yong,&Yuan, Quan.(2025).Capillary number effects on two-phase flow and residual oil morphology in water and supercritical CO2 displacement: A microfluidic study.ENERGY,316,15. |
| MLA | Li, Lian,et al."Capillary number effects on two-phase flow and residual oil morphology in water and supercritical CO2 displacement: A microfluidic study".ENERGY 316(2025):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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