Wells – Processes – In situ combustion
Reexamination Certificate
2008-02-13
2010-11-30
Suchfield, George (Department: 3676)
Wells
Processes
In situ combustion
C166S050000, C166S256000, C166S260000, C166S261000, C166S272700, C166S306000, C166S371000
Reexamination Certificate
active
07841404
ABSTRACT:
A modified method for in situ recovery of hydrocarbon from an underground hydrocarbon-containing formation. An “L” shaped production well, having a vertical section, and a lower horizontal leg positioned low in the formation, is provided. The horizontal leg connects to the vertical section at a heel portion, and has a toe portion at an opposite end thereof. Oxidizing gas is injected into the formation in or proximate the vertical section. A combustion front sweeps outwardly from the vertical section and laterally within the formation above the horizontal leg, from the heel to the toe, causing hydrocarbons in the formation above the horizontal leg to drain downwardly into the horizontal leg, which are then delivered to surface via production tubing. A non-oxidizing gas is injected into at least the heel portion and preferably additional portions of the horizontal leg via injection tubing contained within the vertical section of the production well.
REFERENCES:
patent: 5167280 (1992-12-01), Sanchez et al.
patent: 5456315 (1995-10-01), Kisman et al.
patent: 5626191 (1997-05-01), Greaves et al.
patent: 5626193 (1997-05-01), Nzekwu et al.
patent: 6412557 (2002-07-01), Ayasse et al.
patent: 7493952 (2009-02-01), Ayasse
patent: 7581587 (2009-09-01), Pfefferle
patent: 2006/0207762 (2006-09-01), Ayasse
patent: 2007/0199706 (2007-08-01), Hocking
patent: 2007/0256833 (2007-11-01), Pfefferle
patent: 2009/0308606 (2009-12-01), Ayasse
patent: WO 2005121504 (2005-12-01), None
patent: WO 2007033462 (2007-03-01), None
Ayasse Conrad
Bloomer Chris
Wu Xinjie
Archon Technologies Ltd.
Gowling Lafleur Henderson LLP
Horne D. Doak
Suchfield George
LandOfFree
Modified process for hydrocarbon recovery using in situ... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modified process for hydrocarbon recovery using in situ..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified process for hydrocarbon recovery using in situ... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4250199