Solubilizing surfactants in miscible drive solvents

Patent · Tue May 09 04:00:00 EDT 1989

OSTI ID:5869623

Irani, C A

An improved method is described for recovering oil from a subterranean, hydrocarbon-bearing formation which is penetrated by at least one injection well and at least one production well wherein a liquid non-aqueous displacement fluid is injected into the formation through the injection well and fluids are produced from the production well, the improvement comprising dissolving in the non-aqueous displacement fluid an effective amount of a surfactant and a cosolvent prior to injecting the fluid into the formation. The cosolvent is adapted to increase the solubility of the surfactant in the displacement fluid, and wherein the displacement fluid is selected from the group comprising carbon dioxide, nitrogen, and mixtures of any combination selected from the group comprising carbon dioxide, nitrogen, and light hydrocarbons.

• Assignee: NOV; NOV-89-065055; EDB-89-113096
• Patent Number(s): US 4828029
• OSTI ID: 5869623
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
DISPLACEMENT FLUIDS
ELEMENTS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
MISCIBLE-PHASE DISPLACEMENT
NITROGEN
NONMETALS
OIL WELLS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
RECOVERY
STIMULATION
SURFACTANTS
WELL STIMULATION
WELLS