Oil recovery process using micellar dispersions containing a metal phosphate

Patent · Tue Sep 05 00:00:00 EDT 1972

OSTI ID:7301273

Roszelle, W O

To improve oil recoveries in reservoirs containing a relatively high hardness, about 1 percent by weight metal phosphate was added to the oil-external micellar dispersion. Berea cores (20.4 percent porosity, 572 md) were saturated with crude and flooded with brine (100,000 ppm TDS, 10,000 ppm equivalent to calcium carbonate hardness) before treatment with the micellar dispersion followed by Pusher 530 in freshwater. The dispersion contained petroleum sulfonate, crude oil, primary amyl alcohol, brine (5,000 ppm sodium chloride), and sodium hexametaphosphate (79.7 percent OIP was recovered). This was about 18 percent more than was obtained without the metal phosphate.

• Assignee: TIC; EDB-77-143850
• Patent Number(s): US 3688844
• OSTI ID: 7301273
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
OXYGEN COMPOUNDS
PETROLEUM
PHOSPHATES
PHOSPHORUS COMPOUNDS
SODIUM COMPOUNDS
SODIUM PHOSPHATES
WELL STIMULATION
WELLS