Factpages Norwegian petroleum directorate
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EKOFISK

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  • General information

    General information
    Attribute Value
    Field name
    Official field name
    EKOFISK
    Factmaps in new window
    Current activity status
    Current activity status of the field. Example of legal values: SHUT DOWN, PRODUCING, PDO APPROVED
    Producing
    Discovery wellbore
    Name of the wellbore which proved the field.
    Discovery year.
    The year the field was discovered
    1969
    Main area
    Main NCS area. Example of legal values: NORTH SEA, NORWEGIAN SEA, BARENTS SEA
    North sea
    Main supply base
    Main supply base
    Tananger
    NPDID field
    NPD's unique id for fields
    43506
  • Picture

    Picture
    EKOFISK Field
  • Discoveries included

    Discoveries included
    Discovery name
  • Activity status – history

    Activity status – history
    Status
    Status from
    Status to
    Approved for production
    01.03.1972
    14.06.1971
    Producing
    15.06.1971
  • Located in

    Located in
    Block name
    Prod. licence
    2/4
  • Owner – current

    Owner – current
    Owner kind
    Owner name
    PRODUCTION LICENSE
  • Operatorship – current

    Operatorship – current
    Company name
  • Licensees – current

    Licensees – current
    Company name
    Nation code
    Company share [%]
    NO
    39.896000
    NO
    35.112000
    NO
    12.388000
    NO
    7.604000
    NO
    5.000000
  • The NPD estimate for reserves (Norwegian share)

    The NPD estimate for reserves (Norwegian share)
    Valid date:
    31.12.2021
    The NPD estimate for reserves (Norwegian share)
    Orig. recoverable oil
    [mill Sm3]
    Orig. recoverable gas
    [bill Sm3]
    Orig. recoverable NGL
    [mill tonn]
    Orig. recoverable cond.
    [mill Sm3]
    Orig. recoverable oil eq.
    [mill Sm3 o.e]
    536.01
    152.87
    15.79
    0.00
    718.88
    The NPD estimate for reserves (Norwegian share)
    Orig. inplace oil
    [mill Sm3]
    Orig. inplace ass. liquid
    [mill Sm3]
    Orig. inplace ass. gas
    [bill Sm3]
    Orig. inplace free gas
    [bill Sm3]
    1069.10
    0.00
    286.00
    0.00
    The NPD estimate for reserves (Norwegian share)
    Remaining oil
    [mill Sm3]
    Remaining gas
    [bill Sm3]
    Remaining NGL
    [mill tonn]
    Remaining cond.
    [mill Sm3]
    Remaining oil eq.
    [mill Sm3 o.e]
    43.05
    3.76
    0.87
    0.00
    48.46
  • Description

    Description
    Type
    Text
    Date updated
    Development
    Ekofisk is a field in the southern part of the Norwegian sector in the North Sea. The water depth is 70 metres. Ekofisk was discovered in 1969, and the initial plan for development and operation (PDO) was approved in 1972. Test production was initiated in 1971 and ordinary production started in 1972. Production was initially routed to tankships until a concrete storage tank was installed in 1973. Since then, the field has been further developed with many facilities, including facilities for associated fields and export pipelines. Several of the initial facilities have already been removed or are awaiting decommissioning. The initial field development started with three production platforms: Ekofisk A, Ekofisk B and Ekofisk C. Wellhead platform Ekofisk X and process platform Ekofisk J were installed in 1996 and 1998, respectively, as part of the Ekofisk II project. In 2005, wellhead platform Ekofisk M was installed as part of the Ekofisk Growth Project. A plan for water injection at Ekofisk was approved in 1983. Ekofisk K, which is the main injection facility, started water injection in 1987 and is still in operation. There had also been water injection at Ekofisk W from 1989 until 2009, when Ekofisk W was shut down and replaced by a subsea template, Ekofisk VA. A PDO for the development of Ekofisk South was approved in 2011. The project included two new installations in the southern part of the field: production platform Ekofisk Z and a subsea template for water injection, Ekofisk VB. Injection from Ekofisk VB and production from Ekofisk Z started in 2013. The accommodation facilities Ekofisk H and Ekofisk Q were replaced by Ekofisk L in 2014. An amended PDO for an additional water injection template, Ekofisk VC, was approved in 2017.
    25.02.2020
    Reservoir
    Ekofisk produces oil from naturally fractured chalk of Late Cretaceous age in the Tor Formation and early Paleocene age in the Ekofisk Formation. The reservoir rock has high porosity, but low permeability. The reservoir has an oil column of more than 300 metres and lies at 3,000 metres depth.
    25.04.2019
    Recovery
    Ekofisk was originally produced by pressure depletion and had an expected recovery factor of 17 per cent. Since then, comprehensive water injection has contributed to a substantial increase in oil recovery. Large-scale water injection started in 1987, and in subsequent years, the area for water injection has been extended in several phases. Experience has proven that water displaces the oil much more effectively than anticipated, and the expected final recovery factor for Ekofisk is now estimated to be over 50 per cent. In addition to the water injection, compaction of the soft chalk provides extra force to drainage of the field. The reservoir compaction has resulted in about 10 metres subsidence of the seabed, especially in the central part of the field. It is expected that the subsidence will continue, but at a much lower rate.
    16.03.2018
    Transport
    Oil and gas are routed to export pipelines via the processing facility at Ekofisk J. Gas from the Ekofisk area is transported via the Norpipe gas pipeline to Emden in Germany, while the oil is sent via the Norpipe oil pipeline to Teesside in the UK.
    16.03.2018
    Status
    Production from Ekofisk is maintained at a high level through continuous water injection, drilling of production and injection wells, and well interventions. Key challenges are identifying the remaining oil pockets in a mature, waterflooded reservoir, as well as handling the increasing volumes of produced water. Ekofisk Life of Field Seismic (LoFS) provides data for monitoring of waterflood and dynamic changes in the overburden for use in reservoir management. First phase drilling on Ekofisk Z was completed in 2020. Infill drilling on Ekofisk is expected to continue throughout the lifetime of the field. Water injection is extended in the southern part of the field by the installation of a new subsea template, Ekofisk VC.
    21.12.2021
  • Investments (expected)

    Investments (expected)
    Future investments from 2021 [mill NOK 2021-kroner] : 25497
  • Investments (historical)

    Investments (historical)
    Investments
    [mill NOK nominal values]
    Sum
    156111
    2020
    2601
    2019
    4075
    2018
    5276
    2017
    3697
    2016
    4089
    2015
    7087
    2014
    8361
    2013
    13061
    2012
    13692
    2011
    10174
    2010
    6777
    2009
    6775
    2008
    5047
    2007
    5215
    2006
    4985
    2005
    4362
    2004
    5141
    2003
    2491
    2002
    1777
    2001
    1574
    2000
    395
    1999
    679
    1998
    2897
    1997
    4616
    1996
    8489
    1995
    3919
    1994
    3053
    1993
    545
    1992
    635
    1991
    1169
    1990
    864
    1989
    775
    1988
    136
    1987
    229
    1986
    265
    1985
    119
    1984
    346
    1983
    115
    1982
    429
    1981
    555
    1980
    139
    1979
    121
    1978
    550
    1977
    862
    1976
    1144
    1975
    931
    1974
    1346
    1973
    1645
    1972
    2195
    1971
    576
    1970
    115
  • Production , saleable

    Production , saleable
    Month
    Net - oil
    [mill Sm3]
    Net - gas
    [bill Sm3]
    Net - condensate
    [mill Sm3]
    Net - NGL
    [mill Sm3]
    Net - oil equivalents
    [mill Sm3]
    Sum
    494.928179
    149.676992
    0.000000
    28.278442
    672.883613
    2022
    2.203691
    0.294644
    0.000000
    0.059495
    2.557830
    2021
    4.723875
    0.656805
    0.000000
    0.132620
    5.513300
    2020
    5.080461
    0.738144
    0.000000
    0.167992
    5.986597
    2019
    5.598058
    0.859358
    0.000000
    0.189395
    6.646811
    2018
    5.819553
    0.864849
    0.000000
    0.190118
    6.874520
    2017
    6.297518
    0.934038
    0.000000
    0.190008
    7.421564
    2016
    6.125358
    0.885679
    0.000000
    0.176434
    7.187471
    2015
    6.479480
    0.979101
    0.000000
    0.198642
    7.657223
    2014
    6.786199
    0.964630
    0.000000
    0.217697
    7.968526
    2013
    6.392385
    0.828627
    0.000000
    0.198275
    7.419287
    2012
    7.575003
    1.102515
    0.000000
    0.270937
    8.948455
    2011
    8.411350
    1.297491
    0.000000
    0.293440
    10.002281
    2010
    9.387545
    1.589054
    0.000000
    0.371184
    11.347783
    2009
    11.247099
    1.902784
    0.000000
    0.455642
    13.605525
    2008
    12.188976
    2.156211
    0.000000
    0.528047
    14.873234
    2007
    13.182626
    2.285503
    0.000000
    0.524086
    15.992215
    2006
    15.790198
    2.637835
    0.000000
    0.635421
    19.063454
    2005
    15.818245
    2.531173
    0.000000
    0.612771
    18.962189
    2004
    16.521170
    2.578580
    0.000000
    0.622007
    19.721757
    2003
    17.172678
    2.688605
    0.000000
    0.623001
    20.484284
    2002
    17.232917
    2.743134
    0.000000
    0.604778
    20.580829
    2001
    16.564567
    2.877655
    0.000000
    0.522722
    19.964944
    2000
    16.668578
    3.014809
    0.000000
    0.548599
    20.231986
    1999
    14.273939
    2.784815
    0.000000
    0.484212
    17.542966
    1998
    14.534260
    3.623763
    0.000000
    0.625936
    18.783959
    1997
    14.271755
    4.993076
    0.000000
    0.819243
    20.084074
    1996
    13.445723
    5.242841
    0.000000
    0.895167
    19.583731
    1995
    12.827370
    5.176290
    0.000000
    0.919482
    18.923142
    1994
    10.101140
    4.748295
    0.000000
    0.844976
    15.694411
    1993
    8.766770
    4.669110
    0.000000
    0.857190
    14.293070
    1992
    8.996117
    5.863771
    0.000000
    0.964952
    15.824840
    1991
    8.600786
    4.839408
    0.000000
    1.058235
    14.498429
    1990
    7.495305
    5.218487
    0.000000
    1.081768
    13.795560
    1989
    6.637857
    5.042424
    0.000000
    1.146439
    12.826720
    1988
    5.362982
    3.775786
    0.000000
    1.092696
    10.231464
    1987
    3.996733
    3.878898
    0.000000
    0.737724
    8.613355
    1986
    4.696871
    2.653074
    0.000000
    0.916752
    8.266697
    1985
    6.233659
    5.811482
    0.000000
    1.192822
    13.237963
    1984
    7.418934
    6.595373
    0.000000
    1.200084
    15.214391
    1983
    8.109357
    5.922780
    0.000000
    1.276963
    15.309100
    1982
    8.127318
    6.343069
    0.000000
    1.093172
    15.563559
    1981
    8.986314
    6.496649
    0.000000
    1.041992
    16.524955
    1980
    10.998654
    6.454681
    0.000000
    1.118430
    18.571765
    1979
    12.978387
    5.759196
    0.000000
    0.576896
    19.314479
    1978
    15.522186
    4.931257
    0.000000
    0.000000
    20.453443
    1977
    15.888289
    1.441243
    0.000000
    0.000000
    17.329532
    1976
    16.226786
    0.000000
    0.000000
    0.000000
    16.226786
    1975
    10.995331
    0.000000
    0.000000
    0.000000
    10.995331
    1974
    2.014168
    0.000000
    0.000000
    0.000000
    2.014168
    1973
    1.869520
    0.000000
    0.000000
    0.000000
    1.869520
    1972
    1.927020
    0.000000
    0.000000
    0.000000
    1.927020
    1971
    0.357118
    0.000000
    0.000000
    0.000000
    0.357118
  • Production , sum wellbores

    Production , sum wellbores
    Month
    Gross - oil
    [mill Sm3]
    Gross - gas
    [bill Sm3]
    Gross - condensate
    [mill Sm3]
    Gross - oil equivalents
    [mill Sm3]
    Sum
    507.300586
    207.915697
    0.000000
    715.216283
    2022
    2.130702
    0.423577
    0.000000
    2.554279
    2021
    4.588945
    0.941357
    0.000000
    5.530302
    2020
    5.008457
    1.079774
    0.000000
    6.088231
    2019
    5.449087
    1.208368
    0.000000
    6.657455
    2018
    5.628664
    1.206105
    0.000000
    6.834769
    2017
    6.152777
    1.271462
    0.000000
    7.424239
    2016
    5.983398
    1.199283
    0.000000
    7.182681
    2015
    6.267178
    1.319204
    0.000000
    7.586382
    2014
    6.578901
    1.326773
    0.000000
    7.905674
    2013
    6.209171
    1.170297
    0.000000
    7.379468
    2012
    7.149025
    1.465910
    0.000000
    8.614935
    2011
    7.997770
    1.648340
    0.000000
    9.646110
    2010
    8.932085
    2.011300
    0.000000
    10.943385
    2009
    10.712581
    2.395256
    0.000000
    13.107837
    2008
    11.545218
    2.653935
    0.000000
    14.199153
    2007
    12.541886
    2.862901
    0.000000
    15.404787
    2006
    15.436105
    3.189171
    0.000000
    18.625276
    2005
    15.429403
    2.986181
    0.000000
    18.415584
    2004
    16.063205
    3.009569
    0.000000
    19.072774
    2003
    16.944467
    3.136526
    0.000000
    20.080993
    2002
    17.353974
    3.167556
    0.000000
    20.521530
    2001
    16.685179
    3.241139
    0.000000
    19.926318
    2000
    16.713862
    3.323595
    0.000000
    20.037457
    1999
    14.697925
    2.688649
    0.000000
    17.386574
    1998
    15.023024
    3.761551
    0.000000
    18.784575
    1997
    15.232564
    5.471955
    0.000000
    20.704519
    1996
    14.167645
    6.936399
    0.000000
    21.104044
    1995
    13.563087
    6.902657
    0.000000
    20.465744
    1994
    10.827071
    6.464043
    0.000000
    17.291114
    1993
    9.554206
    6.817669
    0.000000
    16.371875
    1992
    9.900500
    7.774119
    0.000000
    17.674619
    1991
    9.603255
    7.557751
    0.000000
    17.161006
    1990
    8.497577
    6.670953
    0.000000
    15.168530