The Edda 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 1980. Production ceased in 1998 and the installation and field infrastructure were dismantled in 2012.
The field The characteristics of the Edda field reservoir are as follows. +Edda field propertiesFieldEddaReservoirMaastrichtian and lower Paleocene chalk.
Upper Cretaceous Tor formationBlock2/7aReservoir depth3100 m, 10,500 feetAPI gravity33-39°Gas Oil ratio (GOR)1,125 scf/bbl (standard cubic feet / barrel)Sulphur content0.1%Pressure7,175 psi (49,470 kPa)Discovery September 1972Recoverable reserves44-68 million barrels oil; 220-600 billion cubic feet gas
Owner and operator The field was owned and operated by ConocoPhillips Skandinavia AS.
Infrastructure The field was developed through a single offshore installation, designated Edda ‘C’. +Edda infrastructureNameEdda ‘C’Coordinates56.464839°N 3.104464°EWater depth71mBridgeTo flare structureInstallationMay 1978FunctionProduction and accommodationProduction start1979TypeSteel jacketSubstructure weight tonnes6,155Topsides weight tonnes10,390Number of wells13 (15 slots)Legs12Piles12Flare3-leg jacketStatusDecommissionedExport, liquids10-inch 8-mile pipeline to Ekofisk RExport, gas12-inch 8-mile pipeline to Ekofisk RDesign contractorBrown and Root Jacket fabricationNAPM VlissingenDeck fabricationRDL MethilAccommodation48
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.
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 (natural gas liquids)and gas production profile of the Edda field is as shown.
+Edda production profileYearOil (million standard m3 oil equivalentNGL (MSm3OE)Gas (MSm3OE)19790.0490880.0022440.01006419801.2602640.0846010.42031219810.7177920.0712560.40862219820.4236240.0550910.29656819830.2910550.0447670.20060519840.2319170.0292230.13330619850.191990.0228170.08988219860.1394360.013080.05159319870.0499610.004080.01471319880.0792920.0064680.01818719890.1709310.0142840.04444219900.1785780.0150960.04903119910.1440940.0095060.03735719920.1688690.0097090.04203219930.1363410.0078840.03299419940.1369030.0074140.03129119950.1458240.0071390.03113219960.1381130.0062960.03135719970.1036840.0050440.02016219980.0595540.0030260.012671 Over this period, Edda produced 30.3 million barrels of oil, 1.97 million scm of gas and 21 000 tonnes of NGL.
Edda ‘C’ ceased in production in 1998 and the installation was removed from the field in 2012.
See also Ekofisk oil field Albuskjell oil and gas field Cod oil gas and condensate field Eldfisk oil and gas field Odin gas field Embla oil and gas field Tor oil field
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