Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Method for effectively handling CO/sub 2/-hydrocarbon gas mixture in a miscible CO/sub 2/ flood for oil recovery

Patent ·
OSTI ID:7041342
In a method for the recovery of viscous oil from a subterranean viscous, oil-containing formation penetrated by injection wells and spaced-apart production wells forming a well pattern is described comprising: (a) injecting carbon dioxide into the formation via the injection wells at the miscible displacement pressure to miscibility displace oil through the formation to the production wells and recovering fluids including oil and gas containing hydrocarbons from the formation via production wells; (b) separating the gas containing hydrocarbon from the oil and analyzing the gas to determine the concentration of carbon dioxide; (c) recovering the produced gas containing the maximum CO/sub 2/ content tolerable in a fuel gas; (d) continuing steps (a), (b) and (c) until the produced gas contains from more than the maximum CO/sub 2/ content tolerable in a fuel gas up to about 70 volume percent CO/sub 2/ and reinjecting the gas into a small portion of the well pattern volume via a predetermined number of injection wells; (e) continuing steps (a), (b), (c) and (d) until the produced gas contains more than 70 volume percent CO/sub 2/ and reinjecting the gas into a larger portion of the well pattern volume via a predetermined number of injection wells; and (f) continuing steps (a), (b), (c), (d) and (e) until the amount of oil recovered from the formation is unfavorable.
Assignee:
Mobil Oil Corp., New York, NY
Patent Number(s):
US 4744417
OSTI ID:
7041342
Country of Publication:
United States
Language:
English

Similar Records

Method for operating a production well in an oxygen driven in-situ combustion oil recovery process
Patent · Tue Jul 08 00:00:00 EDT 1986 · OSTI ID:5433799
Viscous oil recovery method
Patent · Tue Jul 01 00:00:00 EDT 1986 · OSTI ID:5513470
Lowering CO/sub 2/ MMP and recovering oil using carbon dioxide
Patent · Tue Apr 30 00:00:00 EDT 1985 · OSTI ID:5358217

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE INJECTION
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENGINEERING
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
MISCIBLE-PHASE DISPLACEMENT
NATURAL GAS
OIL WELLS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
QUANTITATIVE CHEMICAL ANALYSIS
RECOVERY
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
STIMULATION
WELL SPACING
WELL STIMULATION
WELLS