CO/sub 2/ displacements of reservoir oils from long berea cores: Laboratory and simulation results

Journal Article · Sun May 01 00:00:00 EDT 1988 · SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)

OSTI ID:6687382

Kremesec, Jr, V J; Sebastian, H M

CO/sub 2/ displacements of three different reservoir oils from long Berea cores were conducted over a wide range of reservoir conditions with the pressure always above the slim-tube minimum miscibility pressure (MMP). The detailed performance of these displacements is simulated with a fully compositional simulator and the Redlich-Kwong (RK) equation of state (EOS). Oil recovery, GOR, and effluent profiles are compared with experimental results. The EOS is observed to be capable of predicting the phase-behavior transitions that occur in situ when miscibility is generated by multiple contacts. The good comparison between experimental results and the simulation has led to specification of a minimum data set for which an EOS should be able to predict before a priori simulations of displacement experiments can be made. The simulation assumed a stable one-dimensional (1D) displacement and that phase-behavior effects play the primary role in the displacement, but the number of gridblocks had to be adjusted in a rough correlation with the CO/sub 2//oil-viscosity ratio. Experimentally, final oil saturation and CO/sub 2/ breakthrough time also correlate with the viscosity ratio. This suggests that viscous instabilities play a role in the experimental displacement, but is this geometry and under these displacement conditions, they can be simulated as numerical dispersion.

• Research Organization: Amoco Production Co., Tulsa, OK (US)
• OSTI ID: 6687382
• Journal Information: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Vol. 3:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CARBON DIOXIDE
INTERACTIONS
DISPLACEMENT FLUIDS
PHASE STUDIES
OIL WELLS
CARBON DIOXIDE INJECTION
PETROLEUM
BENCH-SCALE EXPERIMENTS
DRILL CORES
ENHANCED RECOVERY
EQUATIONS OF STATE
GEOLOGIC MODELS
PERFORMANCE
PRESSURE DEPENDENCE
SOLUBILITY
VISCOSITY
WELL STIMULATION
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
EQUATIONS
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
MISCIBLE-PHASE DISPLACEMENT
OXIDES
OXYGEN COMPOUNDS
RECOVERY
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production