Miscible gas enhanced oil recovery method using oil-brine compatible pre-formed foam

Patent · Tue Aug 16 04:00:00 EDT 1988

OSTI ID:6668209

Suzuki, S

A method is described of enhancing recovery of petroleum from an oil bearing formation during injection of a non-condensible gas having at least partial miscibility in the oil which comprises at least periodically injecting a preformed foam composition formed of alpha olefin sulfonate (AOS) and brine or water, into the oil bearing formation, the pre-formed foam being a mixture of the gas, brine or water and an effective foam forming amount of an AOS, the AOS having from 8 to 24 carbon atoms, the number of carbon atoms being selected in accordance with the salt content of brine in the formation so that at higher salt concentrations the AOS has on average less than about 12 carbon atoms and at lower salt concentrations the AOS has on average at least about 12 carbon atoms.

• Assignee: Chevron Research Co., San Francisco, CA
• Patent Number(s): US 4763730
• OSTI ID: 6668209
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKENES
AQUEOUS SOLUTIONS
BRINES
CHEMICAL COMPOSITION
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GAS INJECTION
HYDROCARBONS
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
QUANTITY RATIO
RECOVERY
SOLUTIONS
STIMULATION
SULFONATES
WATERFLOODING
WELL STIMULATION
WELLS