Foam for secondary and tertiary recovery
Patent
·
OSTI ID:7093234
A foamed oil-external micellar dispersion was used in enhanced oil recovery. The dispersion was composed of ammonium petroleum sulfonate, an alcohol, water, and a hydrocarbon. Laboratory tests using sandpacks (43 darcies, 40 percent porosity) were carried out for secondary and tertiary recoveries. Primary amyl alcohol and residue crude oil (7 cp) were the alcohol and hydrocarbon in the micellar dispersion. The sandpacks were flooded with an aqueous solution (2 percent sodium chloride), saturated with oil, and then also waterflooded for the tertiary recovery tests. Air was used to form the foam in situ and to displace the micellar slug. The maximum recoveries were 71 percent (secondary) and 85 percent (tertiary). Consolidated sandstone cores were saturated with water, flooded with oil and waterflooded before treatment. The micellar dispersion contained residue straight run gasoline and isopropanol, as well as the surfactant and water. The foam was formed with natural gas before injection and was followed by a mobility buffer (water thickened partially hydrolyzed polyacrylamides). Oil recovery was economically attractive.
- Assignee:
- Marathon Oil Co.
- Patent Number(s):
- US 3759325
- OSTI ID:
- 7093234
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALCOHOLS
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOAMS
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SULFONATES
SULFONIC ACID ESTERS
WELLS
020300* -- Petroleum-- Drilling & Production
ALCOHOLS
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOAMS
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SULFONATES
SULFONIC ACID ESTERS
WELLS