Miscible drive-waterflooding process

Patent · Tue Sep 21 04:00:00 EDT 1965

OSTI ID:6624494

Woertz, B B

This is a miscible drive waterflood process in which the reservoir is contacted first with a liquefied hydrocarbon, then with carbon dioxide and lastly with water. The method consists of injecting into the reservoir a quantity of liquid low-molecular-weight hydrocarbon, liquefied under reservoir conditions, followed by an injection of carbon dioxide to drive the hydrocarbon liquid and carbon dioxide through the reservoir by the injection of floodwater in the direction of an output well. The reservoir pressure is maintained at a pressure of at least 700 psi. The amount of low-molecular-weight hydrocarbon injected is between 0.01-0.1 reservoir pore volume, and the amount of carbon dioxide injected is from 0.05-0.35 reservoir pore volume of liquid hydrocarbon. The low- molecular-weight hydrocarbon may have propane or butane as the major constituent. (7 claims)

• Assignee: TUL; EDB-81-043611
• Patent Number(s): US 3207217
• OSTI ID: 6624494
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKANES
BUTANE
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROCARBONS
MEDIUM PRESSURE
MISCIBLE-PHASE DISPLACEMENT
MOLECULAR WEIGHT
OIL WELLS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PROPANE
RECOVERY
STIMULATION
WATERFLOODING
WELL STIMULATION
WELLS