Eldfisk oil and gas field
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The characteristics of the Eldfisk field reservoir are as follows.[1][2][3]
| 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 million barrels oil; 107 to 3.0 billion cubic feet gas |
Owners and operator
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
The Eldfisk field was originally developed through the use of three offshore platforms.[3]
| 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
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]
| 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 |