Method of recovering oil by in-situ produced carbon dioxide

Patent · Tue May 14 04:00:00 EDT 1968

OSTI ID:6080635

Sharp, L G

A method of recovering oil from an underground reservoir includes the following steps: (1) oxidizing the reservoir materials within the reservoir in the presence of an oxidizing fluid introduced into it through an injection well, with the oxidizing fluid containing at least 66% by volume of oxygen to produce a gaseous phase whose major portion is carbon dioxide, and which is miscible with the oil in the reservoir at reservoir conditions of temperature and pressure; (2) terminating the oxidizing of the reservoir materials when a predetermined quantity of the gaseous phase has been produced within the reservoir; (3) introducing into the reservoir through the injection well the driving fluid which is miscible with the gaseous phase and forcing the driving fluid, the gaseous phase, and the oil through the reservoir toward a production well; and (4) producing the oil from the reservoir through a production well. (11 claims)

• Assignee: Mobile Oil Corp.
• Patent Number(s): CA 785071
• OSTI ID: 6080635
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
IN-SITU PROCESSING
MISCIBLE-PHASE DISPLACEMENT
NONMETALS
OIL WELLS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM
PROCESSING
RECOVERY
RESERVOIR PRESSURE
RESERVOIR TEMPERATURE
STIMULATION
WELL STIMULATION
WELLS