Vertical downward gas-driven miscible blanket flooding oil recovery process

Patent · Tue Nov 26 04:00:00 EST 1974

OSTI ID:5144410

Allen, J C; Tate, J F

A vertical downward gas-driven miscible blanket oil recovery process is described wherein the spreading rate of the solvent blanket on top of the oil column is increased by adding to the conventional solvent a high density solvent such as carbon disulfide, carbon tetrachloride or certain halogenated hydrocarbons. Sufficient dense solvent is added to the conventional hydrocarbon solvent to increase the density of the injected solvent mixture to a value only slightly less than the density of the formation petroleum being displaced, so that a stable blanket will be maintained with substantially increased rate and extent of spreading of the solvent blanket on top of the oil column. The miscible blanket is displaced downward by injecting gas such as natural gas, methane, or carbon dioxide into the upper portion of the reservoir. (17 claims)

• Assignee: Texaco Inc
• Patent Number(s): US 3850243
• OSTI ID: 5144410
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKANES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE INJECTION
CARBON OXIDES
CARBON TETRACHLORIDE
CHALCOGENIDES
CHLORINATED ALIPHATIC HYDROCARBONS
ENERGY SOURCES
ENGINEERING
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GAS INJECTION
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
METHANE
MISCIBLE-PHASE DISPLACEMENT
NATURAL GAS
OIL WELLS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
RECOVERY
RESERVOIR ENGINEERING
SOLVENTS
STIMULATION
WELL STIMULATION
WELLS