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Albuskjell oil and gas field

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The Albuskjell oil and gas field was a crude oil and associated gas production field in the Norwegian sector of the central North Sea. Production of oil and gas started in 1979, peak oil and gas was achieved in 1982. Production ceased in 1998 and the field installations were dismantled by 2013.

The field

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

Field Albuskjell
Reservoir Gas and condensate: Maastrichtian and lower Paleocene chalk.

Main reservoir: Upper Cretaceous Tor formation

Block 1/6
Reservoir depth 3,200 m, 10,600 feet
API gravity 48°
Gas Oil ratio (GOR) 13,043 scf/bbl (standard cubic feet / barrel)
Sulphur content 0.5%
Pressure 7,266 psi (50,097 kPa)
Discovery August 1972
Recoverable reserves 172 MMbbls (million barrels) oil; 2.4 bcf (billion cubic feet) gas

Owners and operator

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The field was owned and operated by ConocoPhillips Skandinavia AS.[1]

Infrastructure

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The Akbuskjell field was developed through two offshore installations:[3]

Name Albuskjell ‘A’ Albuskjell ‘F’
Coordinates 56.462886°N 2.940008°E 56.602536°N 3.053947°E
Block 1/6 2/4
Water depth 71m 71 m
Bridge To flare structure To flare structure
Installation September 1976 March 1977
Function Drilling, production and accommodation Drilling, production and accommodation
Production start May 1979 July 1979
Type Steel jacket Steel jacket
Substructure weight tonnes 8,902 7,190
Topsides weight tonnes 10,649 11,418
Number of wells 15 (20 slots) 10 (20 slots)
Legs 12 12
Piles 12 12
Flare 3-leg jacket and intermediate support 3-leg jacket and intermediate support
Status Decommissioned Decommissioned
Export, liquids 18-inch 5.28-mile pipeline to Albuskjell F 18-inch 8.125-mile pipeline to Ekofisk R
Export, gas 24-inch 2.28-mile pipeline to Albuskjell F 18-inch 8.125-mile pipeline to Ekofisk R
Design contractor Tecnomare Tecnomare
Jacket fabrication Aker Trondelag at Verdal NAPM a Vlissingen
Deck fabrication Aker Stord at Stord Aker Stord at Stord
Accommodation 46 originally, 96 replacement in 1983 46 originally, 96 replacement in 1983

Production

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The design production capacity of Albuskjell ‘A’ was 79,400 bopd (barrels of oil per day) and 274 mmscfd (million standard cubic feet per day) of gas.[1] Initial separation was at 1,280 psia (88.3 bar).

The production capacity of Albuskjell ‘F’ was almost identical, 79,400 bopd and 273 mmscfd. Process facilities included gas dehydration and oily water treatment.[3] Peak production was 80,000 bopd and 450 mmscfd in 1982.

Production from the Albuskjell field was by natural depletion.  The oil, natural gas liquids (NGL) and gas production profile of the Albuskjell field is as shown.[1]

Albuskjell production profile
Year Oil (million standard m3 oil equivalent NGL (MSm3OE) Gas (MSm3OE)
1979 0.531158 0.060289 0.651959
1980 1.441672 0.207705 1.779093
1981 1.42621 0.268375 2.248558
1982 0.95293 0.250901 1.998169
1983 0.697342 0.253451 1.654546
1984 0.461588 0.169006 1.18348
1985 0.357291 0.156644 1.026213
1986 0.28525 0.129324 0.945511
1987 0.215786 0.106315 0.778243
1988 0.175572 0.095923 0.613004
1989 0.1415 0.067016 0.456129
1990 0.10894 0.045838 0.338582
1991 0.090845 0.031397 0.271183
1992 0.086781 0.026808 0.266091
1993 0.096074 0.032594 0.308713
1994 0.081022 0.027668 0.263826
1995 0.073878 0.02448 0.236197
1996 0.054346 0.021044 0.217567
1997 0.046137 0.020038 0.191699
1998 0.029543 0.011605 0.10563

Albuskjell ceased in production in 1998 and the installations were removed from the field in 2011 and 2013.[1] Significant reserves remain in place and may be exploited in future.[1]

See also

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Reference

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  1. ^ a b c d e f "Albuskjell field data". Norwegian Petroleum. Retrieved 8 June 2024.
  2. ^ "OSPAR Inventory of Offshore Installations - 2021". Retrieved 8 June 2024.
  3. ^ a b c The North Sea Platform Guide. Ledbury: Oilfield Publications Limited. 1985. pp. 186–89.