Dan

Overview

Dan is one of the largest chalk fields in the Danish North Sea, producing oil and gas from the Ekofisk and Tor formations. These reservoirs are characterised by high porosity but low permeability, with oil reservoir beneath gas cap.

The field is structured as a domal trap, divided by a major fault into two main areas (A-block and B-block), with additional development in the West Flank area between Dan and Halfdan.

Field Development

The Dan field has been developed in multiple phases over more than five decades:

• Early years: vertical and deviated wells
• 1980s onwards: transition to horizontal drilling
• 1990s: introduction and full-scale implementation of water injection

Today, water injection is the primary recovery mechanism, supported by ongoing reservoir monitoring and optimisation.

In total, approximately 126 wells have been drilled, with around 40 active oil producers and 30+ active water injectors supporting production.

Infrastructure and Exports

The field is centred around the Dan Hub, which includes:

• The Dan F complex (core processing facilities)
• The original Dan platform complex
• The Kraka satellite field (tie-back)
• The Regnar satellite (now decommissioned)

Hydrocarbons are processed at the central Dan facilities. Oil is exported to Gorm, and gas is exported to Tyra to be further exported to Netherlands or Denmark.

Satellite Fields

Kraka is a tie-back development producing from the fractured chalk, Ekofisk formation. The field located approximately 8 km southeast of Dan. The field came onstream in 1991 and continues to contribute to the Dan Hub production system.

Regnar was brought onstream in 1993 and now decommissioned.

Today and Outlook

Through continuous development and technology upgrades, the Dan field has evolved from a conventional early-stage development into a mature, highly optimised asset.

Ongoing reservoir management, well optimisation, and infrastructure integration ensure that Dan remains a key contributor to Danish oil and gas production.