THERMAL RECOVERY METHOD FOR OPTIMUM IN-SITU VISBREAKING OF HEAVY OIL

THERMAL RECOVERY METHOD FOR OPTIMUM IN-SITU VISBREAKING OF HEAVY OIL A method for the recovery of oil from a subterranean, viscous oil-containing formation by injecting a predetermined amount of steam into the formation via a well completed in the middle portion of the oil-containing formation for a...

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Bibliographische Detailangaben
Hauptverfasser:	HARTMAN, KATHY J, SHU, WINSTON R
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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Beschreibung
Zusammenfassung:	THERMAL RECOVERY METHOD FOR OPTIMUM IN-SITU VISBREAKING OF HEAVY OIL A method for the recovery of oil from a subterranean, viscous oil-containing formation by injecting a predetermined amount of steam into the formation via a well completed in the middle portion of the oil-containing formation for a distance between 40 to 60 percent of the vertical thickness of the oiI-containing formation, terminating injection of steam and producing fluids including oil through the same well used for the injection of steam. The steps of injecting steam and producing oil can be repeated for a plurality of cycles. Injectng steam through a selected completion interval in the middle of the formation induces maximum visbreaking of the viscous oil within the formation by controlling heat losses to the over and under strata.