Surfactant waterflooding oil recovery method

Patent · Tue Dec 29 00:00:00 EST 1981

OSTI ID:5832689

Schievelbein, V H

Oil is recovered from an underground petroleum reservoir which contains a brine having a salinity of from 50 to 220 kg/m3 total dissolved solids by injecting an alkylarylpolyalkoxy sulfate or alkylpolyalkoxy sulfate surfactant that exhibits phase stability in the brine or diluted brine. The surfactant is injected in an aqueous solution which is prepared with diluted brine which has a salinity slightly less than that required to cause partitioning of the surfactant out of the aqueous phase into the oil-water interface or oil phase. The injection of surfactant is followed by the injecting of a driving slug comprised of either diluted brine or thickened diluted brine.

• Assignee: Texaco Inc
• Patent Number(s): US 4307782
• OSTI ID: 5832689
• Resource Relation: Patent File Date: Filed date 30 Apr 1980; Other Information: PAT-APPL-145291
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
MICROEMULSION FLOODING
BRINES
ENHANCED RECOVERY
INJECTION WELLS
MISCIBLE-PHASE DISPLACEMENT
PETROLEUM SULFONATES
PHASE STABILITY
POLYMERS
SULFATES
SURFACTANTS
WATERFLOODING
ESTERS
FLUID INJECTION
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
RECOVERY
STABILITY
SULFONATES
SULFONIC ACID ESTERS
SULFUR COMPOUNDS
WELLS
020300* - Petroleum- Drilling & Production