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- W2517490077 abstract "The purpose of the three experiments described in this paper is to investigate the efficiency of secondary and tertiary gas injection in fractured carbonate reservoirs, focusing on the effect of equilibrium gas, re-pressurization and non-equilibrium gas. A weakly water-wet sample from Asmari limestone which is the main oil producing formation in Iran, was placed vertically in a specially designed core holder surrounded with fracture. The unique feature of the apparatus used in the experiment, is the capability of initializing the sample with live oil to obtain a homogeneous saturation and create the fracture around it by using a special alloy which is easily meltable. After initializing the sample, the alloy can be drained from the bottom of the modified core holder and create the fracture which is filled with live oil and surrounded the sample. Pressure and temperature were selected in the experiments to give proper interfacial tensions which have been measured experimentally. Series of secondary and tertiary gas injection were carried out using equilibrium and non-equilibrium gas. Experiments have been performed at different pressures and effect of reduction of interfacial tension were checked by re-pressurization process. The experiments showed little oil recovery due to water injection while significant amount of oil has been produced due to equilibrium gas injection and re-pressurization. Results also reveal that CO2 injection is a very efficient recovery method while injection of C1 can also improve the oil recovery." @default.
- W2517490077 created "2016-09-16" @default.
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- W2517490077 date "2016-01-01" @default.
- W2517490077 modified "2023-09-24" @default.
- W2517490077 title "Investigation of Oil Recovery in Fractured Carbonate Rock by Equilibrium and Non-Equilibrium Gas in Weakly Water-Wet Condition" @default.
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