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In situ recovery of oil from tar sands using oil-external micellar dispersions

Patent ·
OSTI ID:5386948
; ;
Oil from subsurface tar sands having an injection means in fluid communication with a production means is recovered by injecting an oil-external miceller dispersion at a temperature above 100/sup 0/F into the tar sands and displacing it toward the production means to recover hydrocarbon through the production means. The micellar dispersion can be preceded by a slug of hot water (e.g., above 100/sup 0/F) and the water can have a pH greater than about 7. Also, the water within the micellar dispersion can have a pH of about 7 to 14; and, preferably the dispersion is at a temperature greater than about 150/sup 0/F. The micellar dispersion contains hydrocarbon surfactant, aqueous medium, and optionally consurfactant and/or electrolyte.
Assignee:
Marathon Oil Co.
Patent Number(s):
US 3648771
OSTI ID:
5386948
Country of Publication:
United States
Language:
English

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Related Subjects

04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
ELECTROLYTES
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
IN-SITU PROCESSING
MEDIUM TEMPERATURE
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
OIL SAND DEPOSITS
OIL SANDS
PH VALUE
PROCESSING
SURFACTANTS
WATERFLOODING