Edda oil and gas field

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The Edda oil and gas field is 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 1980. Production ceased in 1998 and the installation and field infrastructure were dismantled in 2012.

Contents

The field

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

Edda field properties
FieldEdda
ReservoirMaastrichtian and lower Paleocene chalk.

Upper Cretaceous Tor formation

Block2/7a
Reservoir depth3100 m, 10,500 feet
API gravity 33-39°
Gas Oil ratio (GOR)1,125 scf/bbl (standard cubic feet / barrel)
Sulphur content0.1%
Pressure7,175 psi (49,470 kPa)
DiscoverySeptember 1972
Recoverable reserves44-68 MMbbls (million barrels) oil; 220-600 bcf (billion cubic feet) gas

Owner and operator

The field was owned and operated ConocoPhillips Skandinavia AS. [2]

Infrastructure

The field was developed through a single offshore installation, designated Edda ‘C’. [1] [2] [3]

Edda infrastructure
NameEdda ‘C’
Coordinates56.464839°N 3.104464°E
Water depth71m
BridgeTo flare structure
InstallationMay 1978
FunctionProduction and accommodation
Production start1979
TypeSteel jacket
Substructure weight tonnes6,155
Topsides weight tonnes10,390
Number of wells13 (15 slots)
Legs12
Piles12
Flare3-leg jacket
StatusDecommissioned
Export, liquids10-inch 8-mile pipeline to Ekofisk R
Export, gas12-inch 8-mile pipeline to Ekofisk R
Design contractorBrown and Root
Jacket fabricationNAPM Vlissingen
Deck fabricationRDL Methil
Accommodation48

Production

The design production capacity was 4,100 Nm3/day oil and 1 million Nm3/day gas. Initial separation was at 515 psia (35.5 bar). Process facilities included gas dehydration and oily water treatment. [1]

Production from the Edda field was by natural depletion. From 1988 gas from Tommeliten Gamma was used as gas lift for the Edda wells. The oil, NGL and gas production profile of the Edda field is as shown. [2]

Edda production profile
YearOil (million standard m3 oil equivalentNGL (MSm3OE)Gas (MSm3OE)
19790.0490880.0022440.010064
19801.2602640.0846010.420312
19810.7177920.0712560.408622
19820.4236240.0550910.296568
19830.2910550.0447670.200605
19840.2319170.0292230.133306
19850.191990.0228170.089882
19860.1394360.013080.051593
19870.0499610.004080.014713
19880.0792920.0064680.018187
19890.1709310.0142840.044442
19900.1785780.0150960.049031
19910.1440940.0095060.037357
19920.1688690.0097090.042032
19930.1363410.0078840.032994
19940.1369030.0074140.031291
19950.1458240.0071390.031132
19960.1381130.0062960.031357
19970.1036840.0050440.020162
19980.0595540.0030260.012671

Over this period Edda produced 30.3 million barrels of oil, 1.97 million scm of gas and 21 000 tonnes of NGL. [4]

Edda ‘C’ ceased in production in 1998 and the installation was removed from the field in 2012. [2]

See also

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References

  1. 1 2 3 The North Sea Platform Guide. Ledbury: Oilfield Publications Limited. 1985. pp. 199–200.
  2. 1 2 3 4 5 "Edda field data" . Retrieved 8 June 2024.
  3. 1 2 "OSPAR Inventory of Offshore Installations - 2021" . Retrieved 8 June 2024.
  4. "Oil and gas fields in Norway" (PDF). Retrieved 11 July 2024.