2-Propanol is an alcohol commonly used in petroleum exploration and production operations. Howeve... more 2-Propanol is an alcohol commonly used in petroleum exploration and production operations. However, there are at present no data concerning its effects on hydrate stability available in the open literature. Here, we present experimental hydrate equilibrium data ...
ABSTRACT The phase and volumetric behaviour measurements of a five-component synthetic gas conden... more ABSTRACT The phase and volumetric behaviour measurements of a five-component synthetic gas condensate are presented. Vapour–liquid equilibrium volume measurements were performed by carrying out constant composition expansion (CCE) tests at 278.15, 303.15, 313.15, 333.15, 353.15 and 383.15K. The pressure change was in the range of 10.45–41.47MPa. A high-pressure–high-temperature oscillating tube densitometer was employed to measure vapour–liquid equilibrium phase densities at 303.15 and 353.15K and various pressures.
Interfacial tension values of two liquid–liquid–vapour systems, a ternary water–decane–methane an... more Interfacial tension values of two liquid–liquid–vapour systems, a ternary water–decane–methane and a quaternary water–cyclohexane–decane–methane, were measured using a pendant drop technique at 150°C and high pressures up to 28.1MPa. The tested ternary mixture showed a maximum liquid–liquid interfacial tension by increasing pressure whereas it only slightly increased liquid–liquid interfacial tension in the quaternary system. The predicted interfacial tension values by
The Canadian Journal of Chemical Engineering, 2001
ABSTRACT An integrated experimental/modelling investigation was conducted on the potential of new... more ABSTRACT An integrated experimental/modelling investigation was conducted on the potential of newly discovered strueture-H (sH) hydrates formation in petroleum reservoir fluids. A thermodynamic model was validated against a series of experimental data on a natural gas with various quantities of methylcyclohexane (MCH). Three mixtures were tested where structure-II (sII), sII/sH and sH were the stable structures. The validated thermodynamic model was employed to predict the stable hydrate structure for a large number of real reservoir fluids, (i.e., black oils, volatile oils and gas condensates). The results showed that sII is the stable hydrate structure for all systems investigated in this work. However, sH might co-exist with sII in some reservoir fluids where transportation of hydrates as slurry is being considered.On a mené une recherche intrégrant expériences et modélisation sur la formation potentielle d'hydrates de structure H (sH) nouvellement découverts dans des fluides de réservoirs de pétrole. Un modèle thermodynamique a été validé par rapport à une série de données expérimentales sur un gaz naturel avec diverses quantités de méthylcyclohéxane (MCH). Trois mélanges ont été testés où structure-Il (sll), sll/sH et sH sont des structures stables. On a eu recours au modèle thermodynamique validé afin de prédire la structure d'hydrates stable pour un grand nombre de fluides de réservoirs réels (p.ex. huiles noires, huiles volatiles et condensats de gaz). Les résultats montrent que sll est la structure d'hydrates stable pour tous les systèmes étudiés dans ce travail. Toutefois, sH peut coexister avec sll dans certains fluides de réservoirs où le transport des hydrates sous forme de suspension est envisagé.
ABSTRACT It is known that gas hydrates remove the light ends from reservoir fluids. Therefore, co... more ABSTRACT It is known that gas hydrates remove the light ends from reservoir fluids. Therefore, controlled hydrate formation in reservoir fluids could be an attractive option for separating oil and gas; that is, to replace conventional production facilities. In this communication we present the results of an integrated experimental and modelling study on the feasibility of the process, and the impact of the various parameters on the rate of hydrate formation. The study investigated the impact of parameters, such as mixing, water history, temperature, pressure, volume of reactor, heat removal requirements, and the quality of separated liquid. The work identified the major parameters and some of the technological requirements. Based on the experimental data, a simplified mass transfer model was constructed to simulate the kinetics of the separation process and to calculate the reactor volume and heat requirements at a specified degree of conversion. The results showed that it is possible to remove most of the lights from the liquid hydrocarbon phase by hydrate formation. The resulting liquid phase could be suitable for pipeline export or tanker loading after some treatment. Associated gas could be recovered locally from the hydrate phase. Alternatively, in cases where there is no infrastructure for transporting this gas, it might be exported as a hydrate slurry, as proposed by Gudmundsson and coworkers.
... Maria Llamedo {dagger} , Ross Anderson and Bahman Tohidi * ... 1999; Henry et al. 1999). The ... more ... Maria Llamedo {dagger} , Ross Anderson and Bahman Tohidi * ... 1999; Henry et al. 1999). The melting and freezing behavior of organic and inorganic compounds confined to narrow pores is an extensively studied phenomenon (Christenson 2001). ...
2-Propanol is an alcohol commonly used in petroleum exploration and production operations. Howeve... more 2-Propanol is an alcohol commonly used in petroleum exploration and production operations. However, there are at present no data concerning its effects on hydrate stability available in the open literature. Here, we present experimental hydrate equilibrium data ...
ABSTRACT The phase and volumetric behaviour measurements of a five-component synthetic gas conden... more ABSTRACT The phase and volumetric behaviour measurements of a five-component synthetic gas condensate are presented. Vapour–liquid equilibrium volume measurements were performed by carrying out constant composition expansion (CCE) tests at 278.15, 303.15, 313.15, 333.15, 353.15 and 383.15K. The pressure change was in the range of 10.45–41.47MPa. A high-pressure–high-temperature oscillating tube densitometer was employed to measure vapour–liquid equilibrium phase densities at 303.15 and 353.15K and various pressures.
Interfacial tension values of two liquid–liquid–vapour systems, a ternary water–decane–methane an... more Interfacial tension values of two liquid–liquid–vapour systems, a ternary water–decane–methane and a quaternary water–cyclohexane–decane–methane, were measured using a pendant drop technique at 150°C and high pressures up to 28.1MPa. The tested ternary mixture showed a maximum liquid–liquid interfacial tension by increasing pressure whereas it only slightly increased liquid–liquid interfacial tension in the quaternary system. The predicted interfacial tension values by
The Canadian Journal of Chemical Engineering, 2001
ABSTRACT An integrated experimental/modelling investigation was conducted on the potential of new... more ABSTRACT An integrated experimental/modelling investigation was conducted on the potential of newly discovered strueture-H (sH) hydrates formation in petroleum reservoir fluids. A thermodynamic model was validated against a series of experimental data on a natural gas with various quantities of methylcyclohexane (MCH). Three mixtures were tested where structure-II (sII), sII/sH and sH were the stable structures. The validated thermodynamic model was employed to predict the stable hydrate structure for a large number of real reservoir fluids, (i.e., black oils, volatile oils and gas condensates). The results showed that sII is the stable hydrate structure for all systems investigated in this work. However, sH might co-exist with sII in some reservoir fluids where transportation of hydrates as slurry is being considered.On a mené une recherche intrégrant expériences et modélisation sur la formation potentielle d'hydrates de structure H (sH) nouvellement découverts dans des fluides de réservoirs de pétrole. Un modèle thermodynamique a été validé par rapport à une série de données expérimentales sur un gaz naturel avec diverses quantités de méthylcyclohéxane (MCH). Trois mélanges ont été testés où structure-Il (sll), sll/sH et sH sont des structures stables. On a eu recours au modèle thermodynamique validé afin de prédire la structure d'hydrates stable pour un grand nombre de fluides de réservoirs réels (p.ex. huiles noires, huiles volatiles et condensats de gaz). Les résultats montrent que sll est la structure d'hydrates stable pour tous les systèmes étudiés dans ce travail. Toutefois, sH peut coexister avec sll dans certains fluides de réservoirs où le transport des hydrates sous forme de suspension est envisagé.
ABSTRACT It is known that gas hydrates remove the light ends from reservoir fluids. Therefore, co... more ABSTRACT It is known that gas hydrates remove the light ends from reservoir fluids. Therefore, controlled hydrate formation in reservoir fluids could be an attractive option for separating oil and gas; that is, to replace conventional production facilities. In this communication we present the results of an integrated experimental and modelling study on the feasibility of the process, and the impact of the various parameters on the rate of hydrate formation. The study investigated the impact of parameters, such as mixing, water history, temperature, pressure, volume of reactor, heat removal requirements, and the quality of separated liquid. The work identified the major parameters and some of the technological requirements. Based on the experimental data, a simplified mass transfer model was constructed to simulate the kinetics of the separation process and to calculate the reactor volume and heat requirements at a specified degree of conversion. The results showed that it is possible to remove most of the lights from the liquid hydrocarbon phase by hydrate formation. The resulting liquid phase could be suitable for pipeline export or tanker loading after some treatment. Associated gas could be recovered locally from the hydrate phase. Alternatively, in cases where there is no infrastructure for transporting this gas, it might be exported as a hydrate slurry, as proposed by Gudmundsson and coworkers.
... Maria Llamedo {dagger} , Ross Anderson and Bahman Tohidi * ... 1999; Henry et al. 1999). The ... more ... Maria Llamedo {dagger} , Ross Anderson and Bahman Tohidi * ... 1999; Henry et al. 1999). The melting and freezing behavior of organic and inorganic compounds confined to narrow pores is an extensively studied phenomenon (Christenson 2001). ...
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