The Dan oil field is a large
oil
An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic (does not mix with water) & lipophilic (mixes with other oils). Oils are usually flammable and surface active. Most oils are unsaturate ...
and associated
gas field
A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations.
Such reservoirs form when kerogen (ancient plant matter) is created in surrounding rock by the presenc ...
in the Danish sector of the
North Sea
The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
, about west of
Esbjerg
Esbjerg (, ) is a seaport town and seat of Esbjerg Municipality on the west coast of the Jutland peninsula in southwest Denmark. By road, it is west of Kolding and southwest of Aarhus. With an urban population of 71,698 (1 January 2022) . 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
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...
Danian chalk at a depth of 5,800 to 6,400 feet (1,768 to 1,951 metres). The oil has an
API gravity
The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water: if its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks ...
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:
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.
The fields are developed through two offshore installations as shown.
The oil production profile of the Kraka and Regnar fields (in 1000 cubic metres) is as shown.
See also
*
Tyra Field
Tyra Field is the largest gas condensate field in the Danish Sector of the North Sea. It was discovered in 1968 and production started in 1984.
The field is owned by Dansk Undergrunds Consortium, a partnership between Total, Noreco and Nordsof ...
*
Gorm Field
''Gorm'' is a natural gas and oilfield in the Danish Sector of North Sea that was discovered in 1971. It is the largest oilfield exploited by Denmark. The field consists of five platforms and is operated by TotalEnergies. The facilities include t ...
*
Halfdan field
Halfdan (, ang, Healfdene, Medieval Latin, Medieval : "half Danes, Dane") was a late 5th and early 6th century legendary Danish king of the Scylding (Skjöldung) lineage, the son of king named Fróði in many accounts, noted mainly as the father ...
*
Skjold oil field
Skjold may refer to:
Places
*Skjold, Bergen, a neighborhood in Bergen municipality in Vestland county, Norway
* Skjold, Rogaland, a village in Vindafjord municipality in Rogaland county, Norway
*Skjold (municipality), a former municipality in Roga ...
*
Siri, Nini and Cecilie oil fields
The Siri oil field and its satellites, Nini and Cecille, are oil producing fields in the Danish sector of the southern North Sea. Operating since 1999 and 2003 they are the most northerly of Denmark's offshore oil assets located close to the Denm ...
*
Valdemar oil and gas field
The Valdemar oil and gas field is a crude oil and gas production field in the Danish sector of the central North Sea. Production of oil and gas started in 1993, peak oil was achieved in 2009 and peak gas in 2010. Production was suspended in 2019. ...
*
South Arne oil and gas field
The South Arne (Danish: ''Syd Arne'') field is a major crude oil and associated gas production field in the Danish sector of the central North Sea. Production of oil and gas started in 1999, and peak oil and gas was in 2000.
The field
The char ...
*
Harald gas field
The Harald field is a gas and associated condensate production field in the Danish sector of the central North Sea. Production of gas and liquids started in 1997, and peak gas was in 1998. The Lulita field is a satellite of the Harald field.
Th ...
*
Ravn oil field
Ravn is a marginal oil field in the Danish sector of the North Sea. It started operating in 2017, with oil exported to an installation in the German sector of the North Sea. Operations were suspended in 2020, and decommissioning is currently bein ...
References
{{coord missing, Denmark
Maersk Oil
Natural gas fields in Denmark
North Sea oil fields
Oil fields of Denmark