ARTUĞ TÜRKMENOĞLU | Hacettepe University (original) (raw)
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Papers by ARTUĞ TÜRKMENOĞLU
Fuel, 2025
In the context of enhanced oil recovery (EOR) techniques like miscible gas flooding, reducing the... more In the context of enhanced oil recovery (EOR) techniques like miscible gas flooding, reducing the density of crude oil offers significant advantages throughout the oil production lifecycle. Flooding the oil reservoir with carbon dioxide (CO2) that has minimal compression costs is amongst the most common methods employed. This study investigates the temperature and density dependence of the minimum miscibility pressure (MMP) of three crude oils from the Southeast Anatolia region using the vanishing interfacial tension (VIT) technique at 40 °C, 60 °C, and 80 °C. A linear equation is developed for MMP prediction based on API gravity, molecular weight of heavy fractions, and temperature. The effect of addition of various solvents, methanol, ethanol, 2-butanol, n-hexane, cyclohexane, acetone, and diethyl ether (DEE) at concentrations of 1 wt%, 2 wt%, and 5 wt%, on the temperature dependent MMP reduction between CO2 and crude oils is investigated. All tested solvents reduced MMP, with methanol being the most effective achieving a reduction up to 550 psi at 5 wt% and 600 psi at 10 wt% concentration, both at 80 °C. Higher temperatures generally favored enhanced MMP reduction by solvent addition. Compared to CO2, alternative gases methane (CH4) and nitrogen (N2) exhibited significantly higher MMP values, making them less suitable for miscible flooding in the investigated crude oil systems. These findings offer valuable insights for optimizing CO2-based EOR projects. Selecting appropriate solvents and injection pressures can significantly improve oil recovery efficiency. The developed correlation for MMP prediction can be a useful tool for field applications.
Journal of Surfactants and Detergents, 2020
Garzan oil field is located at the south east of Turkey. It is a mature oil field and the reservo... more Garzan oil field is located at the south east of Turkey. It is a mature oil field and the reservoir is fractured carbonate reservoir. After producing about 1% original oil in place (OOIP) reservoir pressure started to decline. Waterflooding was started in order to support reservoir pressure and also to enhance oil production in 1960. Waterflooding improved the oil recovery but after years of flooding water breakthrough at the production wells was observed. This increased the water/oil ratio at the production wells. In order to enhance oil recovery again different techniques were investigated. Chemical enhanced oil recovery (EOR) methods are gaining attention all over the world for oil recovery. Surfactant injection is an effective way for interfacial tension (IFT) reduction and wettability reversal. In this study, 31 different types of chemicals were studied to specify the effects on oil production. This paper presents solubility of surfactants in brine, IFT and contact angle measur...
Pressure - Volume - Temperature (PVT) analyses simulate the reservoir fluid behavior while flowin... more Pressure - Volume - Temperature (PVT) analyses simulate the reservoir fluid behavior while flowing from the reservoir to the surface under varying pressure, volume and temperature conditions. There are several PVT simulators that perform PVT calculations. Accurate characterization of a fluid is very important for further studies and reservoir simulations in all reservoir engineering aspects. Because there are a few equations of state and many types of reservoir and reservoir fluids, experimental data does not perfectly match with the PVT simulation results. Low API black oils include heavy hydrocarbons. Therefore, regression and characterization of plus fractions are needed in order to get better results from the PVT simulators. PVT data is usually used for field development program, reserve calculations, and EOR/IOR implementations such as gas flooding. In this study, PVT experiments, which are Constant Composition Experiment, 0 - Flash Experiment, Gas and Oil Compositional Analysi...
Fuel, 2025
In the context of enhanced oil recovery (EOR) techniques like miscible gas flooding, reducing the... more In the context of enhanced oil recovery (EOR) techniques like miscible gas flooding, reducing the density of crude oil offers significant advantages throughout the oil production lifecycle. Flooding the oil reservoir with carbon dioxide (CO2) that has minimal compression costs is amongst the most common methods employed. This study investigates the temperature and density dependence of the minimum miscibility pressure (MMP) of three crude oils from the Southeast Anatolia region using the vanishing interfacial tension (VIT) technique at 40 °C, 60 °C, and 80 °C. A linear equation is developed for MMP prediction based on API gravity, molecular weight of heavy fractions, and temperature. The effect of addition of various solvents, methanol, ethanol, 2-butanol, n-hexane, cyclohexane, acetone, and diethyl ether (DEE) at concentrations of 1 wt%, 2 wt%, and 5 wt%, on the temperature dependent MMP reduction between CO2 and crude oils is investigated. All tested solvents reduced MMP, with methanol being the most effective achieving a reduction up to 550 psi at 5 wt% and 600 psi at 10 wt% concentration, both at 80 °C. Higher temperatures generally favored enhanced MMP reduction by solvent addition. Compared to CO2, alternative gases methane (CH4) and nitrogen (N2) exhibited significantly higher MMP values, making them less suitable for miscible flooding in the investigated crude oil systems. These findings offer valuable insights for optimizing CO2-based EOR projects. Selecting appropriate solvents and injection pressures can significantly improve oil recovery efficiency. The developed correlation for MMP prediction can be a useful tool for field applications.
Journal of Surfactants and Detergents, 2020
Garzan oil field is located at the south east of Turkey. It is a mature oil field and the reservo... more Garzan oil field is located at the south east of Turkey. It is a mature oil field and the reservoir is fractured carbonate reservoir. After producing about 1% original oil in place (OOIP) reservoir pressure started to decline. Waterflooding was started in order to support reservoir pressure and also to enhance oil production in 1960. Waterflooding improved the oil recovery but after years of flooding water breakthrough at the production wells was observed. This increased the water/oil ratio at the production wells. In order to enhance oil recovery again different techniques were investigated. Chemical enhanced oil recovery (EOR) methods are gaining attention all over the world for oil recovery. Surfactant injection is an effective way for interfacial tension (IFT) reduction and wettability reversal. In this study, 31 different types of chemicals were studied to specify the effects on oil production. This paper presents solubility of surfactants in brine, IFT and contact angle measur...
Pressure - Volume - Temperature (PVT) analyses simulate the reservoir fluid behavior while flowin... more Pressure - Volume - Temperature (PVT) analyses simulate the reservoir fluid behavior while flowing from the reservoir to the surface under varying pressure, volume and temperature conditions. There are several PVT simulators that perform PVT calculations. Accurate characterization of a fluid is very important for further studies and reservoir simulations in all reservoir engineering aspects. Because there are a few equations of state and many types of reservoir and reservoir fluids, experimental data does not perfectly match with the PVT simulation results. Low API black oils include heavy hydrocarbons. Therefore, regression and characterization of plus fractions are needed in order to get better results from the PVT simulators. PVT data is usually used for field development program, reserve calculations, and EOR/IOR implementations such as gas flooding. In this study, PVT experiments, which are Constant Composition Experiment, 0 - Flash Experiment, Gas and Oil Compositional Analysi...