| 摘要 |
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 noninverted 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). |
