期刊
TRANSPORT IN POROUS MEDIA
卷 144, 期 1, 页码 3-31出版社
SPRINGER
DOI: 10.1007/s11242-021-01743-7
关键词
Capillary number; Capillary desaturation curve; Enhanced oil recovery; Macroscopic capillary number; Capillary force
资金
- China Natural Science Foundation [51834005]
- Science Foundation of China University of Petroleum, Beijing [2462021XKBH008]
- China Scholarship Council [201806440187]
- Deutscher Akademischer Austauschdienst [91737128]
Capillary number, as the ratio of viscous force to capillary force, is an important parameter in enhanced oil recovery (EOR). However, the nature and quantification of macroscopic capillary forces are still controversial. At least 41 different capillary numbers have been collected, indicating potential inconsistencies between various applications and publications.
Capillary number, understood as the ratio of viscous force to capillary force, is one of the most important parameters in enhanced oil recovery (EOR). It continues to attract the interest of scientists and engineers, because the nature and quantification of macroscopic capillary forces remain controversial. At least 41 different capillary numbers have been collected here from the literature. The ratio of viscous and capillary force enters crucially into capillary desaturation experiments. Although the ratio is length scale dependent, not all definitions of capillary number depend on length scale, indicating potential inconsistencies between various applications and publications. Recently, new numbers have appeared and the subject continues to be actively discussed. Therefore, a short review seems appropriate and pertinent.
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