High water content micellar solution containing thickeners

Patent · Tue Aug 06 04:00:00 EDT 1974

OSTI ID:7215995

Schroeder, D E

For improved oil recovery a viscosity-increasing agent was added to a water-external micellar solution, which contained petroleum sulfonate in the concentration of at least five times the CMC (critical micelle concentration). Berea cores (170 md permeability) were flooded with brine (20,000 ppm TDS), then with crude oil (7 cp at 23/sup 0/C), and finally waterflooded with the brine. The micellar solution followed by a mobility buffer recovered 93.7 percent oil. The micellar solution contained ammonium petroleum sulfonate (MW 300-525), salt, water, hydrocarbon, and Betz copolymers of acrylamide and acrylic acid. Betz polymers were dissolved in water (400 ppm TDS) for the mobility buffer.

• Assignee: Marathon Oil Co.
• Patent Number(s): US 3827496
• OSTI ID: 7215995
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
COLLOIDS
CONTROL
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
MOBILITY
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
SULFONATES
SULFONIC ACID ESTERS
WELL STIMULATION
WELLS