EP 0888489 A4 20001018 - HYDROCARBON RECOVERY METHOD USING INVERTED PRODUCTION WELLS

Title (en)

HYDROCARBON RECOVERY METHOD USING INVERTED PRODUCTION WELLS

Title (de)

VERFAHREN ZUR GEWINNUNG VON KOHLENWASSERSTOFFEN MIT HILFE EINER AUFWÄRTS IN DEN TRÄGER GERICHTETEN PRODUKTIONSBOHRUNG

Title (fr)

PROCEDE DE RECUPERATION D'HYDROCARBURES AU MOYEN DE PUITS DE PRODUCTION INVERSES

Publication

EP 0888489 A4 20001018 (EN)

Application

EP 96911343 A 19960320

Priority

CA 2248757 A 19960320
US 9603718 W 19960320

Abstract (en)

[origin: WO9735090A1] A method using an "inverted" production well (20) for recovering hydrocarbons from a subterranean reservoir (11) wherein the production wellbore (20) has a substantially vertical, non-inverted portion (20a) with angle building to near 90 degrees, an integral, substantially horizontal portion (20b) which extends into said reservoir (11); and an integral, upwardly curving tail portion (20c) which terminates near the top of the reservoir (11). A string of production tubing (23) which may include a downhole pump is positioned within the non-inverted portion (20a) of the wellbore (20). The inverted well (20) increases the production interval within the reservoir (11) and reduces bottom-water coning. Further, a plug (25) can be set in the tail portion (20c) to reduce the production of steam through the wellbore (20). In another embodiment of the present invention, a single inverted well (20) may be used both for injecting steam and producing fluids by extending a string of injection tubing (30) through or adjacent to the production tubing (23) and into the tail portion (20c) of the wellbore (20).

IPC 1-7

E21B 43/24

IPC 8 full level

E21B 7/06 (2006.01); E21B 36/00 (2006.01); E21B 43/24 (2006.01); E21B 43/30 (2006.01)

CPC (source: EP)

E21B 43/24 (2013.01); E21B 43/305 (2013.01)

Citation (search report)

[XY] WO 9421889 A2 19940929 - NORTH JOHN [GB]
[XY] US 5029641 A 19910709 - STAGG THEODORE O [US]
[XY] US 5127457 A 19920707 - STEWART ROBERT B [NL], et al
[X] US 4646836 A 19870303 - GOODHART MILTON E [US]
See references of WO 9735090A1

Designated contracting state (EPC)

DE FR GB NL

DOCDB simple family (publication)

WO 9735090 A1 19970925; CA 2248757 A1 19970925; EP 0888489 A1 19990107; EP 0888489 A4 20001018

DOCDB simple family (application)

US 9603718 W 19960320; CA 2248757 A 19960320; EP 96911343 A 19960320