Eldfisk oil and gas field

The Eldfisk oil and gas field is a crude oil and gas producing field in the Norwegian sector of the central North Sea. Production of oil and gas started in 1979 and peak oil and gas production was achieved in 1980. The facilities have been extended and are still operational.

## The field

[edit]

The characteristics of the Eldfisk field reservoir are as follows.[1][2][3]

Eldfisk field reservoir  Field  | Eldfisk

|

Reservoir  | Upper Cretaceous to Danian Chalk
Block  | 2/7a
Reservoir depth  | 9,500 feet, 600 feet pay
API gravity  | 33°
Gas Oil ratio (GOR)  | 1,525 scf/bbl (standard cubic feet / barrel)
Sulphur content  | 0.2%
Pressure  | 6,815 psi (46,988 kPa)
Discovered  | December 1970
Recoverable reserves  | 502 MMbbls (million barrels) oil; 107 to 3.0 bcf (billion cubic feet) gas

## Owners and operator

[edit]

Currently (2024), the owners of the Eldfisk field and their respective stakes are:[1]

Company  | Interest

|

TotalEnergies EP Norge AS  | 39.896 %
ConocoPhillips Skandinavia AS  | 35.112 %
Vår Energi ASA  | 12.388 %
Sval Energi AS  | 7.604 %
Petoro AS  | 5 %

The field is operated by ConocoPhillips Skandinavia AS.[1]

## Infrastructure

[edit]

The Eldfisk field was originally developed through the use of three offshore platforms.[3]

Eldfisk original platforms  Name  | Eldfisk ‘A’ | Eldfisk ‘FTP’ | Eldfisk ‘B’

|
|
|

Coordinates  | 56.376881°N 3.265803°E  | 56.265933°N 3.265803°E  | 56.419331°N 3.218394°E
Block  | 2/7  | 2/7  | 2/7
Water depth, metres  | 71  | 71  | 71.5
Bridge  | To ‘FTP’  | To ‘A’ and to flare structure  | None
Installed  | July 1975  | unknown  | May 1976
Function  | Drilling, production and accommodation; now well  | Separation, dehydration, compression  | Drilling, production and accommodation
Production start  | August 1979  | August 1979  | December 1979
Type  | Steel jacket  | Steel jacket  | Steel jacket
Jacket weight, tonnes  | 4,206  | 2,689  | 4,353
Total weight, tonnes  | 13,410  | 10,615  | 15,513
Number of wells  | 30 (30 slots)  | None  | 19 (20 slots)
Legs  | 12  | 8  | 12
Piles  | 12  | 8  | 12
Status  | Operational  | Operational  | Operational
Export, liquids  | Bridge to FTP  | 24-inch 3.5-mile pipeline to Eldfisk ‘B’  | 24-inch 11-mile pipeline to Ekofisk R
Export, gas  | Bridge to FTP  | 30-inch 3.5-mile pipeline to Eldfisk ‘B’  | 30-inch 11-mile pipeline to Ekofisk R
Design contractor  | Brown and Root, Worley Engineering  | Brown and Root, Worley Engineering  | Brown and Root
Jacket fabrication  | NAPM, Vlissingen  | UIE, St Wandrille  | NAPM, Vlissingen
Deck fabrication  | Weldit  | Dragados Spain  | Weldit
Accommodation  | 72, replacement 112  | None  | 96

### Field development

[edit]

A water injection facility Eldfisk E was installed in the field in 1999.[1] This facility also supplies water to Ekofisk K. A new integrated facility, Eldfisk S, started operation in 2015.[1] This is connected by bridge to Eldfisk E. This facility replaces several functions of Eldfisk A and Eldfisk FTP. Eldfisk A has been converted into a wellhead platform and Eldfisk FTP is used as bridge-support facility. The Embla oil and gas field, located south of Eldfisk, is tied back to Eldfisk S.[1]

Eldfisk development platforms  Name  | Eldfisk ‘E’ | Eldfisk ‘S’

|
|

Coordinates  | 56.375086°N 3.265207°E  | 54.37374°N 3.262698°E
Block  | 2/7  | 2/7
Water depth, metres  | 72  | 72
Type  | Fixed steel  | Fixed steel
Installed  | September 2000  | May 2013
Jacket weight, tonnes  | 3,215  | 13,000
Topsides weight, tonnes  | 6,857  | 15,900
Bridge  | Eldfisk FTP  | Eldfisk E
Function  | Water injection  | Production

## Production

[edit]

The original production capabilities were as follows.[3]

Parameter  | Eldfisk ‘A’  | Eldfisk ‘FTP’  | Eldfisk ‘B’

|
|
|

Production throughput  | 11,300 Nm3/d oil  |  | 75,500 bopd
3.2 mm Nm3/d gas  |  | 83 mmscfd
Peak field production  | 250,000 bopd
545 mmcfgd
Separation pressure  |  |  | 515 psia
Processing  |  | Separation, gas dehydration and compression  | Separation, gas dehydration and compression

Eldfisk production profile is as follows.[1]

Eldfisk production 1979 to 2023  Year  | Oil (million standard m3 oil equivalent  | NGL (MSm3OE)  | Gas (MSm3OE)

|
|
|

1979  | 1.712171  | 0.07268  | 0.412552
1980  | 5.875162  | 0.295319  | 1.495868
1981  | 4.933234  | 0.28094  | 1.511063
1982  | 4.114687  | 0.278639  | 1.385161
1983  | 3.714956  | 0.328743  | 1.439742
1984  | 3.380447  | 0.295573  | 1.389068
1985  | 3.37752  | 0.33031  | 1.393686
1986  | 3.357574  | 0.305772  | 1.443272
1987  | 3.144948  | 0.294376  | 1.35857
1988  | 3.82161  | 0.510611  | 2.246695
1989  | 4.205455  | 0.558868  | 1.56655
1990  | 3.68102  | 0.481153  | 1.309914
1991  | 2.980452  | 0.328683  | 1.982256
1992  | 2.784801  | 0.271134  | 1.841552
1993  | 2.450877  | 0.250734  | 1.711507
1994  | 2.229795  | 0.22939  | 1.548579
1995  | 2.692235  | 0.291626  | 1.995236
1996  | 2.334067  | 0.242935  | 1.670471
1997  | 2.353065  | 0.259537  | 1.703038
1998  | 1.517407  | 0.168756  | 1.067927
1999  | 1.164147  | 0.100657  | 0.556743
2000  | 1.272862  | 0.117158  | 0.6638
2001  | 1.99595  | 0.145434  | 0.74928
2002  | 2.392482  | 0.163374  | 0.926202
2003  | 2.41857  | 0.141576  | 0.742094
2004  | 3.163272  | 0.184533  | 0.884927
2005  | 3.510821  | 0.177832  | 0.860075
2006  | 3.012221  | 0.15245  | 0.693708
2007  | 2.644137  | 0.121008  | 0.53389
2008  | 3.022456  | 0.13646  | 0.56242
2009  | 2.858015  | 0.117331  | 0.484842
2010  | 2.873997  | 0.114753  | 0.50499
2011  | 2.89384  | 0.108093  | 0.475727
2012  | 2.644953  | 0.089178  | 0.283571
2013  | 1.92996  | 0.06943  | 0.256955
2014  | 1.954917  | 0.069333  | 0.275454
2015  | 2.380954  | 0.08552  | 0.340688
2016  | 2.457843  | 0.082901  | 0.324835
2017  | 2.532525  | 0.084259  | 0.340787
2018  | 2.429397  | 0.077286  | 0.276703
2019  | 2.325186  | 0.074895  | 0.244598
2020  | 2.484702  | 0.111038  | 0.247082
2021  | 2.612156  | 0.117412  | 0.302349
2022  | 2.301337  | 0.090945  | 0.222865
2023  | 2.23726  | 0.083059  | 0.20453

## See also

[edit]

* Ekofisk
* Edda oil and gas field
* Cod oil gas and condensate field
* Albuskjell oil and gas field
* Odin gas field
* Embla oil and gas field
* Tor oil field

## Reference

[edit]

1. ^ a b c d e f g "Eldfisk field". Retrieved 9 July 2024.
2. ^ "OSPAR Inventory of Offshore Installations - 2021". Retrieved 9 July 2024.
3. ^ a b c Oilfield Publications Limited (1985). The North Sea Platform Guide. Ledbury: Oilfield Publications Limited. pp. 113–119.