Method of increasing recovery of petroleum from subterranean formations

Patent · Mon Nov 05 23:00:00 EST 1973

OSTI ID:7301313

Campbell, D W; Matthews, R R

A polymer slug followed by a surfactant slug or one slug containing both polymer and surfactant can be used in tertiary oil recovery. The polymer is 30% hydrolyzed polyacrylamide. Di-n-alkylbenzene sulfonate, neutralized with sodium hydroxide is the surfactant. The alkyl group contains 11 to 15 carbon atoms. Berea cores (permeability 150 to 200 md) were saturated with brine (5% sodium chloride), flooded with 80 pale oil, and waterflooded with brine. The combined slug contained polymer, surfactant and brine and was driven with brine recovering 18.4% PV of tertiary oil.

• Assignee: Continental Oil Co.
• Patent Number(s): US 3770056
• OSTI ID: 7301313
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
BRINES
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
POLYAMIDES
POLYMERS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SULFONATES
SULFONIC ACID ESTERS
SURFACTANTS
WATERFLOODING
WELLS