Effect of paraffinic, naphthenic and aromatic distribution in the hydrocarbon mixture and water on the phase equilibria of carbon dioxide-hydrocarbon systems over the temperature range from 333 K to 366 K
Carbon dioxide flooding has been suggested as an efficient and effective means of achieving additional oil recoveries from depleted and/or water flooded reservoirs. The numerical simulation of a carbon dioxide flood requires a phase equilibria predictor that will provide the compositional distribution of the reservoir fluids as the displacement propagates through the reservoir. The objective of this work was to provide a phase equilibria predictor that utilizes the Soave-Redlich-Kwong (SRK) equation of state. A new PUT apparatus was constructed. This apparatus was used to measure the isothermal P-x data of the systems: CO/sub 2/-toluene, CO/sub 2/-ethylbenzene, CO/sub 2/-propylbenzene, CO/sub 2/-cyclopentane, CO/sub 2/-cyclohexane and CO/sub 2/-methylcyclohexane at 333.15 K, 349.82 K and 366.48 K. Interaction parameters were regressed from literature data for CO/sub 2/-paraffin systems and from the experimental data of this work for CO/sub 2/-aromatic and CO/sub 2/-naphthenic systems. Recommended interaction parameters for these systems are provided. Experimental results indicated that the dominant effect of water on CO/sub 2/-hydrocarbon systems was the solubilization of carbon dioxide by water into the aqueous phase. This concept was simulated with the SRK equation of state and a correlation of literature data on the solubility of carbon dioxide in water. The predicted results agreed well with the experimental results. The presence of dissolved salts in water mitigates the effect of water on CO/sub 2/-hydrocarbon systems. The presence on n-butylbenzene or n-butylcylcohexane in the heavy ends with n-decane improved the maximum miscibility composition of the system. Pressure has a substantial effect on maximum miscibility compositions.
- OSTI ID:
- 6803841
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phase behavior of carbon dioxide in admixture with n-butane, n-decane, n-butylcyclohexane, and n-butylbenzene at 344 K and approximately 9600 kPa
Predicting the equilibrium phase behavior of carbon dioxide/hydrocarbon mixtures using a continuous thermodynamic approach
Related Subjects
OIL WELLS
CARBON DIOXIDE INJECTION
PETROLEUM
ENHANCED RECOVERY
AROMATICS
CARBON DIOXIDE
HYDROCARBONS
MIXTURES
NAPHTHA
PARAFFIN
TEMPERATURE EFFECTS
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COAL TAR OILS
DISPERSIONS
DISTILLATES
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
MISCIBLE-PHASE DISPLACEMENT
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
RECOVERY
WAXES
WELLS
020300* - Petroleum- Drilling & Production