Sweep improvement in enhanced oil recovery

Patent · Tue Nov 03 04:00:00 EST 1987

OSTI ID:5820296

Djabbarah, N F

The method of sweep improvement in an operation involving enhanced oil recovery from a subterranean oil-bearing formation, is described, comprising: (a) injecting, through an injection well into a subterranean oil-bearing formation, an aqueous slug comprising a mixed surfactant system of (1) at least one foaming agent selected from the group consisting of anionic, nonionic, and amphoteric surfactants having foam-producing properties, and (2) a lignosulfonate foaming agent, (b) injecting displacing fluid into the formation through the injection well, with the fluid interacting with the mixed surfactant system to form foam and displacing the oil therein toward a production well, and, (c) recovering the displaced oil through the production well.

• Assignee: Cities Service Co., Tulsa, OK
• Patent Number(s): US 4703797
• OSTI ID: 5820296
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
COLLOIDS
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOAMS
FOSSIL FUELS
FUELS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
RECOVERY
SOLUTIONS
STIMULATION
SULFONATES
SURFACTANTS
SWEEP EFFICIENCY
WATERFLOODING
WELL STIMULATION
WELLS