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Halliburton Installs World's First Multilateral System With Full Re-entry Access
BERGEN, Norway - Halliburton Energy Services announced today that it has successfully installed a Multilateral system with full lateral liner connectivity, a hydraulically-isolated lateral junction and full-bore lateral re-entry access. The system, installed for Norwegian operator Norsk Hydro, is the world's first to provide full-bore re-entry access to the lateral while maintaining the integrity of the main wellbore.
The multilateral system was installed in Norsk Hydro's Oseberg field, located approximately 120 kilometers west of Bergen in the Norwegian North Sea. The Oseberg C platform was installed in 1988 to drain the northern portion of the field. Norsk Hydro set a specific goal for increasing recoverable reserves from this field. Multilateral technology was identified as a means to help achieve the goal.
The multilateral system needed the capability to commingle production from primary and secondary formations. Due to pressure differentials, each formation would also need to be isolated at various times. Additionally, the secondary formation would likely require re-perforation during its production life, so selective re-entry to the main and secondary wellbores for running perforating guns, production logs and installing production control devices was a required feature.
Halliburton's Multilateral System 3000 was chosen for the application because of its full-bore access which provides flexibility in running downhole tools, and lateral isolation which enhances pressure integrity and increases production control.
Johan Mikkelsen, assistant director in Hydro's Exploration and Production Division said, "This multilateral system will allow us to increase recoverable reserves economically. The ability to avoid drilling additional wells while maintaining re-entry access to the lateral is very beneficial."
Halliburton has drilled and completed hundreds of multilateral wells including duals and quads with separated production. The Norsk Hydro well incorporates connectivity, isolation and access in a single system. The system uses 9 5/8-in. casing with a 7-in. steel liner connected mechanically and isolated at the junction with Halliburton's M-Seal high-impact sealant. A 7-in. production tubing string is installed enabling maximum flow in a monobore configuration and full-bore re-entry access to the lateral.
Norsk Hydro and Halliburton worked closely throughout the planning, development and execution phases of the project. The successful installation of this system is viewed as a technical breakthrough by both companies, providing a new opportunity for innovative production schemes and a potential change in the use of surface facilities.
"Using this technology, Hydro will produce considerably more oil in certain fields, at far lower prices than in the past. This is a milestone for us," added Mikkelsen.
As a fully integrated technical solution, System 3000 combines Halliburton's project design and management, directional drilling, reservoir description, cementing, and completion capabilities with Brown & Root surface facilities.
Weatherford Enterra, a global leader in casing exit and whipstock technology, worked closely with Halliburton in the development of the system and provides expertise in milling and retrievable whipstocks.
Halliburton Energy Services, a Halliburton Company organization, is a leading supplier of products, services and integrated solutions to the energy industry on a global basis.
Contact
Brandon Lackey
Public Relations
(p) 713.624.3463
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