World`s first application of a multilateral system combining a cased and cemented junction with fullbore access to both laterals
- and others
Norsk Hydro in conjunction with its service partners have completed the world`s first multilateral well with a cased and cemented junction and fullbore access to both laterals. Norsk Hydro`s Oseberg C platform has a limited number of slots to drill new wells to recover considerable reserves that remain in the Ness Formation of the Brent Group. Multilateral wells were seen as a solution to provide additional cost effective drainage points to the reservoir unit. This highly visible and multidisciplined project demanded a dedicated team from Norsk Hydro and Halliburton during the planning and execution phases. The C-12B horizontal section was drilled and completed as planned in the ORE (Oseberg, Rannoch & Etive) Formations. A window was cut in the 9 5/8-in. parent casing with a packer-based multilateral system. A new lateral was drilled and completed in the Ness Formation and the parent wellbore was regained. Commingled production is possible when the pressure differentials between the two formations have equalized. The following list outlines the main objectives of the testing of multilateral technology. (1) install the whipstock and mill a window (2) install a hollow whipstock (3) install and cement the lateral liner (4) reestablish the parent wellbore (5) acquire fullbore access to the Ness and ORE laterals Norsk Hydro and its service partners evaluated each operational phase according to success criteria mutually agreed upon at the outset of the project.
- OSTI ID:
- 457344
- Report Number(s):
- CONF-961003--
- Country of Publication:
- United States
- Language:
- English
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