| 摘要 |
A method and apparatus are provided for enabling the simultaneous injection of treated water into an aquifer and production of the petroleum from the reservoir immediately above. A Xmas tree is provided to support two tubular strings running from set positions in the well to allow conveyance of fluids as the well conditions and operations require. The inner tubing string (8), runs from the Xmas tree to a cemented casing string, known as a "liner" (10), which is entirely set downhole. The tubing is for conveying injection water down from surface and into the aquifer, or hydrocarbons out of another or same reservoir to surface. The outer tieback tubing string (13), is provided to run from the Xmas tree to a sealing receptacle (12) at the top of the liner. The liner is additionally perforated (5) below the sealing receptacle at selected positions in the hydrocarbon reservoir above the lower packer position. This outer string conveys petroleum from the reservoir to surface and through the Xmas tree to process plant. |
