Dan oil field
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| Dan oil field | |
|---|---|
| Country | Denmark |
| Location/blocks | 7.3 |
| Location | Danish sector North Sea |
| Offshore/onshore | Offshore |
| Operator | Maersk Oil |
| Field history | |
| Discovery | 1971 |
| Start of development | 1971 |
| Start of production | 1972 |
| Peak of production | 10,000 bopd |
| Peak year | 1977 |
| Production | |
| Peak of production (oil) | 10,000 barrels per day (~5.1×105 t/a) |
| Estimated oil in place | 125 million barrels (~1.74×107 t) |
| Recoverable gas | 1,200×109 cu ft (34×109 m3) |
| Producing formations | Upper Cretaceous chalk |
The Dan oil field is a large oil and associated gas field in the Danish sector of the North Sea, about 200 kilometres (120 miles) west of Esbjerg. Oil and gas are produced through a complex of offshore installations. The Kraka and Regnar fields are satellites to the Dan installations.
The Dan field was discovered in May 1971 by the Britannia oil rig in Denmark Block 7.3 of the North Sea.[1] The reservoir is an Upper Cretaceous Danian chalk at a depth of 5,800 to 6,400 feet (1,768 to 1,951 metres). The oil has an API gravity of 30.4 and a gas oil ratio of 600 standard cubic feet per barrel (scf/bbl). The estimated recoverable reserves are 90–125 million barrels (14.3–19.9 million cubic metres) of oil and 1.2–1.3 trillion cubic feet (34–37 billion cubic metres) of gas.[1]
Development
The field was developed in phases through multi-platform installations, summarized as follows:[1][2][3]
| Platform | Function | Configuration | Type | Legs | Well slots | Installed | Production start | Production to |
|---|---|---|---|---|---|---|---|---|
| Dan A | Wellhead drilling | Bridge linked | Steel Jacket | 4 | 6 | September 1971 | July 1972 | Dan B |
| Dan B | Processing | Steel Jacket | 4 | – | 1972 | July 1972 | Oil to Gorm C; Gas to Tyra | |
| Dan C | Separator and Flare | Steel Jacket | 3 | – | 1972 | July 1972 | – | |
| Dan D | Wellhead drilling | Steel Jacket | 4 | 6 | March 1975 | 1976 | Dan B | |
| Dan E | Wellhead drilling | Stand alone | Steel Jacket | 4 | 6 | April 1976 | 1977 | Dan B (pipeline) |
| Dan FA | Wellhead drilling | Bridge linked | Steel Jacket | 1986 | Dan FC | |||
| Dan FB | Wellhead drilling | Steel Jacket | 1986 | Dan FC | ||||
| Dan FC | Processing | Steel Jacket | – | 1986 | Oil to Tyra; gas to Gorm | |||
| Dan FD | Flare | Steel Jacket | – | 1992 | – | |||
| Dan FE | Wellhead | Dan FC | ||||||
| Dan FF | Wellhead and processing | Steel Jacket | ||||||
| Dan FG | Processing | Steel Jacket | – | 2004 |
Production of condensate (in 1000s of barrels) was:[1]
