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- W2022007931 abstract "Abstract In the well fractured carbonate reservoirs the gas/oil gravity drainage from the gas-invaded zone is the dominating oil producing process. When the gravitational forces exceed the capillary forces, the matrix blocks which are surrounded by gas, will release their oil. The results of our experimental works reveal that, depending on the interfacial tension, spreading coefficient, rock wettability, and surface roughness, there is a critical fracture aperture size, tfc. When the fracture aperture is more than tfc, the continuity is via solid compressed spacers and/or oil film around them, which at actual reservoir conditions it may be considered as non-effective capillary continuity. Whereas for the case that the fracture aperture is less than its critical value, the capillary continuity is mainly through liquid bridges which due to their high transmissibility will result in an effective capillary continuity between blocks. Two new definitions for horizontal fracture capillary pressure based on the type of capillary continuity have been presented. Laplace formula and pressure difference between the fracture gas and the matrix oil may be used for calculation of fracture capillary pressure for non-effective and effective continuity, respectively." @default.
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- W2022007931 date "1998-11-11" @default.
- W2022007931 modified "2023-09-23" @default.
- W2022007931 title "Laboratory Studies of Gravity Drainage Mechanism in Fractured Carbonate Reservoir - Capillary Continuity" @default.
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- W2022007931 doi "https://doi.org/10.2118/49497-ms" @default.
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