Hydrocarbon recovery method using inverted production wells

Details Hydrocarbon recovery method using inverted production wells Hydrocarbon recovery method using inverted production wells

1995-01-23

1996-04-30

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166 50, 166303, 166306, 166 891, E21B 706, E21B 3600, E21B 4324

Patent

active

055116167

ABSTRACT:
A method using an "inverted" production well for recovering hydrocarbons from a subterranean reservoir wherein the production wellbore has a substantially vertical, non-inverted portion with angle building to near 90.degree.; an integral, substantially horizontal portion which extends into said reservoir; and an integral, upwardly curving tail portion which terminates near the top of the reservoir. A string of production tubing which may include a downhole pump is positioned within the non-inverted portion of wellbore. The inverted well increases the production interval within the reservoir and reduces bottom-water coning. Further, a plug can be set in the tail portion to reduce the production of steam through the wellbore. In another embodiment of the present invention, a single inverted well may be used both for injecting steam and producing fluids by extending a string of injection tubing through or adjacent to the production tubing and into the tail portion of the wellbore.

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