Halfdan field
{{Infobox oil field|name=Halfdan field|country=Denmark|region=North Sea|coordinates=55.230115N 5.005754E|locblocks=5505/13|offonshore=Offshore|operators=Total E&P Denmark.|owner=TotalEnergies, Nordsofonden, and Noreco.|discovery=1998|start_production=1999|peak_year=2006|est_gas_bcm=6.9|producingformations=Chalk|API=33|peak_production=6.085 million cubic metres of oil}}
Halfdan is a significant oil and gas field in the south-western part of the Danish sector of the southern North Sea. The field has been in production since 1999. The Sif and Igor fields are satellites to Hallfdan.
The field
The Halfdan field comprises the contiguous Halfdan, Sif and Igor fields in Blocks 5505/13 and 5505/16 of the North Sea.{{Cite web |date=2014 |title=Danish Energy Agency |url=https://ens.dk/sites/ens.dk/files/OlieGas/oil_and_gas_in_denmark_2013.pdf |access-date=7 November 2023}} The Sif and Igor fields are respectively to the north and east of the Halfdan field, but are exploited through the Halfdan offshore infrastructure. The south west of the field contains oil of the Maastrichian layers and the north and east area has gas of the Danian era. Key parameters of the fields are given in the table.
| class="wikitable"
|+Halfdan, Sif and Igor reservoir{{Cite web |title=Maersk oil ESIA-16 Non-technical summary – ESIS Halfdan |url=https://ens.dk/sites/ens.dk/files/OlieGas/halfdan_ikke-teknisk_resume_engelsk.pdf |access-date=7 November 2023}} !Parameter !Value |
| Reservoir rock
|Chalk |
| Geological age
|Danian and Upper Cretaceous |
| Depth, ft
|2030-2100 |
| Discovery
|1998 |
| Field delineation, Halfdan
|100 km2 |
| Field delineation, Sif
|40 km2 |
| Field delineation, Igor
|109 km2 |
| Oil density
|33° API |
| Oil reserves
|35.9 million m3 |
| Gas reserves
|6.9 billion Nm3 |
Owners and operators
The Halfdan field is currently owned jointly by TotalEnergies, Nordsofonden, and BlueNord. It was formerly operated by Maersk and is currently operated by Total E&P Denmark.{{Cite web |title=Oil & gas field profile: Halfdan North Conventional Oil Field, Denmark |date=23 November 2021 |url=https://www.offshore-technology.com/marketdata/oil-gas-field-profile-halfdan-north-conventional-oil-field-denmark/ |access-date=7 November 2023}}
Production infrastructure
The Halfdan, Sif and Igor fields are exploited by three offshore installations Halfdan A, Halfdan B and Halfdan C, which were installed and came into operation sequentially. The A and B installations are manned multi-platform bridge-linked facilities. And Halfdan C is an unmanned satellite of the B complex.{{Cite web |title=A Barrel full Halfdan oil and gas field |url=http://abarrelfull.wikidot.com/halfdan-oil-and-gas-field |access-date=7 November 2023}} Key parameters of the installations and platforms are given in the table.
| class="wikitable"
|+Halfdan Installations{{Cite web |title=OSPAR Inventory of Offshore Installations - 2021 |url=https://odims.ospar.org/en/submissions/ospar_offshore_installations_2021_02/ |access-date=7 November 2023}} ! ! colspan="3" |Halfdan A ! colspan="4" |Halfdan B !Halfdan C |
| Block
| colspan="3" |5505/13 | colspan="4" |5505/13 |5505/13 |
| Name
|HDA |HDB |HDC |HBA |HBB |HBC |HBD |HCA |
| Coordinates
|55.230115N 5.005754E | | |55.537992N 5.030886E | | | |55.557225N 5.134502E |
| Water depth, m
|43 |43 |43 |43 |43 |43 |43 |45 |
| Commissioned
|2000 |2003 |2003 |2002 |2008 |2007 |2011 |2008 |
| Type
|Fixed steel |Fixed steel |Fixed steel |Fixed steel |Fixed steel |Fixed steel |Fixed steel |Fixed steel |
| Function
|Wellhead, processing |Accommodation 32 beds |Flare |Wellhead, separation |Riser, wellhead |Accommodation 80 beds |Processing |Wellhead, separation |
| Wells
| colspan="3" |35 | colspan="4" |37 |9 |
| Bridges
| colspan="3" |2: each about 100 metre | colspan="4" |3: 100 to 140 metre |0 |
| Substructure weight, t
|2800 |1000 |1150 |3050 |1800 |2000 |3500 |1100 |
| Topside weight, t
|800 |2200 |500 |2500 |1380 |3000 |9300 |630 |
| Wells
| colspan="3" |35 | colspan="4" |37 |9 |
= Pipelines =
In addition to the offshore installations there are a number of pipelines connecting and transferring fluids within the Halfdan field and to adjacent fields which act as oil and gas export routes.
| class="wikitable"
|+Halfdan and connected pipelines !From !To !Fluid !Length, km !Diameter, inches !Note |
| HDA
|HBA |Gas, oil, water |1.7 |12 | |
| HBA
|HDA |Gas, oil, water |1.7 |14 | |
| HBA
|Dan |Gas, oil, water |11 |20 | |
| Dan
|HDA |Injection water |9 |14 | |
| HDC
|HBA |Gas |2 |24 | |
| HCA
|HBB |Gas |7 |16 | |
| HCA
|HBB |Oil |7 |8 | |
| HDA
|Dan |HP Gas |9 |12 | |
| HDA
|Dan |LP Gas |9 |12 | |
| HDA
|Gorm |Oil & condensate |19 |14 |Oil export route to shore |
| HBA
|Tyra West |Gas |27 |24 |Gas export route to shore |
Halfdan A and B have their own power supplies but are also interconnected. Halfdan C receives power from Halfdan B complex.
Oil and gas production
= Wells =
- Oil production wells: 38 (Halfdan)
- Gas production wells: 16 (Sif and Igor)
- Water injection wells: 27 (Halfdan)
= Plant capacity =
= Annual production and injection =
| class="wikitable"
|+Halfdan annual oil, gas and water production and water injection 1999-2013{{Cite web |last=Danish Energy Agency |title=Monthly and yearly production |date=15 August 2016 |url=https://ens.dk/en/our-services/oil-and-gas-related-data/monthly-and-yearly-production |access-date=8 November 2023}} |Year |1999 |2000 |2001 |2002 |2003 |2004 |2005 |2006 |2007 |2008 |2009 |2010 |2011 |2012 |2013 |
| Oil production, 1000 m3
|222 |1120 |2365 |3718 |4352 |4346 |6000 |6085 |5785 |5326 |5465 |5119 |4905 |4617 |4150 |
| Gas production, million normal m3
|37 |178 |522 |759 |1142 |1449 |2582 |2948 |2675 |3104 |3401 |2885 |2343 |1709 |1389 |
| Produced water, 1000 m3
|56 |237 |493 |367 |612 |2099 |2825 |3460 |4086 |4766 |4814 |5519 |6149 |6139 |6099 |
| Water injection, 1000 m3
|62 |13 |649 |2532 |5162 |5759 |9710 |11026 |12107 |12727 |11485 |11945 |12277 |10912 |10921 |
Future plans
See also
References
{{reflist}}
{{coord missing|Denmark}}
Category:Natural gas fields in Denmark