Oseberg Øst

Profile for Oseberg Øst Oil Project

Location

Oseberg Øst is located in the northern part of the North Sea, approximately 15-25 kilometres northeast of the main Oseberg field.

Discovery and Development

The Oseberg Øst field was discovered in 1981. The plan for development and operation (PDO) was approved in 1996. Production from the field began in 1999.

Field Characteristics

• Water Depth: The field is situated at a water depth of 160 metres.
• Reservoir: The field produces oil from Middle Jurassic sandstone in the Brent Group. It consists of two structures separated by a sealing fault, with several oil-bearing layers having variable reservoir characteristics. The reservoirs are at depths of 2700-3100 metres.

Infrastructure

• Platform: The field has been developed with an integrated fixed facility that includes accommodation, drilling equipment, and first-stage separation of oil, water, and gas. This platform is designed for integrated drilling, accommodation, and production.
• Processing and Transport: Partial processing is carried out on the platform, and the liquids are then sent to the Oseberg Field Centre for further processing. The oil is transported through the Oseberg Transport System (OTS) to the Sture terminal. The gas is mainly used for injection, gas lift, and as fuel for the platform.

Recovery Strategy

• The field is produced using partial pressure support from both water injection and gas injection. Water for injection is produced from the Utsira Formation. The focus is on optimizing the drainage strategy, including injection and well interventions, to maximize oil recovery and gas production rates.

Production Status

• As of the current status, Oseberg Øst is at the tail end of its production phase. Efforts are focused on maximizing oil recovery within the field's lifetime through optimized injection and well interventions. Maximizing gas production is also a priority, as the produced gas is used as a fuel supply for the platform's power generator.

Partners and Operators

• While specific details on the partners for Oseberg Øst are not provided in the sources, the main Oseberg field is operated by Equinor, in partnership with Petoro, TotalEnergies, ExxonMobil, and ConocoPhillips. It is likely that these partners are also involved in the Oseberg Øst project.

Geology and Reservoirs

• The reservoirs in Oseberg Øst are part of the Middle Jurassic sandstone in the Brent Group. The field is divided into two structures with several oil-bearing layers, each with variable reservoir characteristics.

Challenges and Future Outlook

• The main challenge for Oseberg Øst is to maximize oil recovery within the remaining field lifetime. This involves continuous optimization of the drainage strategy, including injection and well interventions. As the field is in its late production phase, efficient management of the remaining resources is crucial.

In summary, Oseberg Øst is a significant oil field in the North Sea, developed with advanced infrastructure to optimize oil and gas production. Despite being in its late production phase, ongoing efforts are aimed at maximizing recovery and efficient resource management.