CARBON DIOXIDE FLOODING WITH A PREMIXED ZONE OF CARBON DIOXIDE AND CRUDE OIL COMPONENTS

CARBON DIOXIDE FLOODING WITH A PREMIXED ZONE OF CARBON DIOXIDE AND CRUDE OIL COMPONENTS

CARBON DIOXIDE FLOODING WITH A PREMIXED TRANSITION ZONE OF CARBON DIOXIDE AND CRUDE OIL COMPONENTS (D#76,439 -F) The disclosed invention is a method of recovering hydrocarbons by determining the critical concentrations of various crude oil components to carbon dioxide to achieve first contact miscib...

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Bibliographische Detailangaben
Hauptverfasser: LIM, FRANK H, HAYNES, STEWART, JR, BROWN, ALFRED, ALVES, GERALD W
Format: Patent
Sprache:eng ; fre
Schlagworte:
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Zusammenfassung:CARBON DIOXIDE FLOODING WITH A PREMIXED TRANSITION ZONE OF CARBON DIOXIDE AND CRUDE OIL COMPONENTS (D#76,439 -F) The disclosed invention is a method of recovering hydrocarbons by determining the critical concentrations of various crude oil components to carbon dioxide to achieve first contact miscibility of a mixture of said crude oil components and carbon dioxide with the underground hydrocarbons at formation temperature and a selected pressure substantially lower than first contact miscibility pressure of carbon dioxide with the hydrocarbons; injecting into the formation a premixed transition zone slug comprising carbon dioxide and said crude oil components at said critical concentrations, formation temperature and said selected pressure; and injecting a drive fluid into the formation after the premixed transition zone slug.