Lowering CO/sub 2/ MMP and recovering oil using carbon dioxide

Patent · Tue Apr 30 00:00:00 EDT 1985

OSTI ID:5358217

Shu, W R

Oil is recovered by a CO/sub 2/ miscible oil recovery method in which the CO/sub 2/ minimum miscibility pressure of the oil-containing formation is lowered by injecting a coolant into the formation. The formation is then pressurized to a pressure at least that of the reduced CO/sub 2/ minimum miscibility pressure by injecting a fluid therein. A slug of carbon dioxide is then injected into the formation at the formation pressure whereby the carbon dioxide is miscible with the formation oil and thereafter a driving agent is injected to displace the formation oil and carbon dioxide toward a production well from which oil is produced.

• Assignee: Mobil Oil Corporation
• Patent Number(s): US 4513821
• OSTI ID: 5358217
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADIABATIC PROCESSES
CARBON DIOXIDE INJECTION
COOLANTS
DISPLACEMENT FLUIDS
ENHANCED RECOVERY
FLUID INJECTION
FLUID MECHANICS
FLUIDS
HYDRAULICS
MECHANICS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
PRESSURE EFFECTS
PRESSURIZING
RECOVERY
SOLUBILITY
WELLS