Dan oil field
The Dan oil field is a large oil and associated gas field in the Danish sector of the North Sea, about 200 kilometres (120 mi) west of Esbjerg.
| 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 field
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]
See also
References
- Oilfield Publications Limited (1985). The North Sea Platforms Guide. Ledbury UK: Oilfield Publications Limited. pp. 144–52.
- "MAERSK OIL ENVIRONMENTAL AND SOCIAL IMPACT STATEMENT – DAN" (PDF). ens.dn. 2015. Archived (PDF) from the original on 2021-10-04. Retrieved 4 October 2021.
- "DUC in the North Sea". Archived from the original on 2021-10-04. Retrieved 4 October 2021.