Determination of the optimum solvent bank size requirement during CO/sub 2/ flooding
This laboratory investigation studied the efficiency of water and of nitrogen as CO/sub 2/ slug propellants, determined the optimum CO/sub 2/ slug size required for flooding, and the effect of horizontal permeability variation on oil recovery during CO/sub 2/ miscible flooding in horizontal consolidated Berea sandstone cores. The interaction between carbon dioxide and dolomite rock during CO/sub 2/ flooding in carbonate oil reservoirs was also investigated using dolomite cores. Water was found to be a more efficient CO/sub 2/ slug propellant than nitrogen in the range of pressure and temperature studied. (110/sup 0/F less than or equal to T less than or equal to 120/sup 0/F, 1500 psig less than or equal to flooding pressure less than or equal to 2650 psig). While the efficiency of nitrogen as the CO/sub 2/ slug propellant increased with the flooding pressure, that of water was almost unaffected by the flooding pressure. A 0.3 HPV CO/sub 2/ slug was found to be the optimum solvent bank size required for miscible flooding in the cores used. The total oil recoveries from a core with variable horizontal permeability were a little lower than those from an homogeneous core at similar flooding conditions (crude oil, pressure and temperature). The heterogeneous core contained zones with horizontal permeabilities greater than or equal to the permeability of the homogeneous core. The total oil recoveries were found to be dependent on the flooding temperature - they decreased as the flooding temperature was increased.
- OSTI ID:
- 6717523
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
DEVELOPMENT OF SHALLOW VISCOUS OIL RESERVES IN NORTH SLOPE
A laboratory investigation of the optimum CO/sub 2/ slug size required for CO/sub 2/ flooding
Related Subjects
NITROGEN
USES
OIL WELLS
CARBON DIOXIDE INJECTION
PETROLEUM
ENHANCED RECOVERY
WATER
OPTIMIZATION
WELL STIMULATION
ELEMENTS
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
MISCIBLE-PHASE DISPLACEMENT
NONMETALS
OXYGEN COMPOUNDS
RECOVERY
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production