# 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. Oil and gas are produced through a complex of offshore installations. The Kraka and Regnar fields are satellites to the Dan installations.

## The field

The Dan field was discovered in May 1971 by the Britannia oil rig in Denmark Block 7.3 of the North Sea. 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.

## Development

The field was developed in phases through multi-platform installations, summarized as follows:
Dan field installations :
| 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 | Bridge linked | Steel Jacket | 4 | – | 1972 | July 1972 | Oil to Gorm C; Gas to Tyra |
| Dan C | Separator and Flare | Bridge linked | Steel Jacket | 3 | – | 1972 | July 1972 | – |
| Dan D | Wellhead drilling | Bridge linked | 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 | Bridge linked | Steel Jacket | | | | 1986 | Dan FC |
| Dan FC | Processing | Bridge linked | Steel Jacket | | – | | 1986 | Oil to Tyra; gas to Gorm |
| Dan FD | Flare | Bridge linked | Steel Jacket | | – | 1992 | | – |
| Dan FE | Wellhead | Bridge linked | | | | | | Dan FC |
| Dan FF | Wellhead and processing | Bridge linked | Steel Jacket | | | | | |
| Dan FG | Processing | Bridge linked | Steel Jacket | | – | 2004 | | |
Production of condensate (in 1000s of barrels) was:

## Kraka and Regnar fields

The Kraka and Regnar fields are satellites to the Dan installation. The characteristics of the fields are as follows.
Kraka and Regnar fields :
| Field | Kraka | Regnar |
| Prospect | Anne | Nils |
| Reservoir | Chalk | Chalk |
| Geological age | Danian and Upper Cretaceous | Upper Cretaceous |
| Coordinates | 55.402045°N 5.078377°E | 55.385323°N 4.288464°E |
| Block | 5505/17 | 5505/17 |
| Reservoir depth | 1,800 m | 1,700 m |
| Field delineation | 81 km$^2$ | 34 km$^2$ |
| Reserves | | |
| Discovered | 1966 | 1979 |
The fields are developed through two offshore installations as shown.
Kraka and Regnar field Installations :
| Field | Kraka | Regnar |
| Production start | 1991 | 1993 |
| Water depth | 45 m | 45 m |
| Installation | Fixed steel no helideck | Subsea steel |
| Function | Wellheads no processing | Wellhead no processing |
| Substructure weight tonnes | 550 | 50 |
| Topsides weight tonnes | 400 | - |
| Number of wells | 8 | 1 |
| Status | Producing (2022) | No production since 2006 |
| Export, well fluids | 9 km 8-inch pipeline to Dan FA | 13 km 8-inch pipeline to Dan FA |
| Import, lift gas | 9 km 3-inch pipeline from Dan FA | - |
The oil production profile of the Kraka and Regnar fields (in 1000 cubic metres) is as shown.
Kraka and Regnar annual oil production (1000 m$^3$) 1991-2007 :
| Year | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 |
| Kraka | 144 | 205 | 390 | 491 | 469 | 340 | 315 | 314 | 404 | 350 | 253 | 157 | 139 | 199 | 211 | 222 | 176 |
| Regnar | | | 145 | 429 | 86 | 41 | 27 | 43 | 29 | 14 | 33 | 18 | 19 | 19 | 16 | 11 | 0 |
Kraka and Regnar annual oil production (1000 m$^3$) 2008-2022 :
| Year | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | Total |
| Kraka | 112 | 37 | 67 | 170 | 129 | 101 | 89 | 146 | 116 | 113 | 108 | 104 | 115 | 145 | 79 | 6,407 |
| Regnar | | | | | | | | | | | | | | | | 930 |