Flooding with micellar dispersions
Patent
·
OSTI ID:7093203
Oil recovery from a reservoir with a relative high concentration of divalent ions is improved by flooding with a micellar solution having a relatively low equivalent weight (average equivalent weight 300 to 450) petroleum sulfonate. The micellar solution is preceded and protected by injection of an aqueous preslug having a controlled ion content, especially at the trailing edge of the preslug. The micellar slug can be either oil-external or water-external and consists of an aqueous medium, low average equivalent weight sulfonate, hydrocarbon, cosurfactant, and electrolyte. A mobility buffer follows the micellar slug and consists of a partially hydrolyzed polyacrylamide solution, Dow Pusher 530. The drivewater is separated from the micellar slug by the mobility buffer. Recoveries from laboratory tests on Berea sandstone cores ranged up to 83.6 percent and were lower with higher equivalent-weight sulfonates.
- Assignee:
- Marathon Oil Co.
- Patent Number(s):
- US 3648773
- OSTI ID:
- 7093203
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
COLLOIDS
CONTROL
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
MICELLAR SYSTEMS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
MOBILITY
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
SULFONATES
SULFONIC ACID ESTERS
WELLS
020300* -- Petroleum-- Drilling & Production
COLLOIDS
CONTROL
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
MICELLAR SYSTEMS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
MOBILITY
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
SULFONATES
SULFONIC ACID ESTERS
WELLS