Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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05.11.2024 - 01:27
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2/8-14

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  • General information
    General information
    Attribute Value
    Wellbore name
    Official name of wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    2/8-14
    Type
    Wellbore type. Legal values: EXPLORATION, DEVELOPMENT, OTHER (see 'Purpose' for more information)
    EXPLORATION
    Purpose
    Final classification of the wellbore.

    Legal values for exploration wellbores:
    WILDCAT, APPRAISAL, WILDCAT-CCS, APPRAISAL-CCS.

    Legal values for development wellbores:
    OBSERVATION, PRODUCTION, INJECTION, INJECTION-CCS, OBSERVATION-CCS.

    Legal values for other wellbores:
    SOIL DRILLING (drilling in connection with track surveys and other subsurface surveys to investigate the soil conditions prior to placement of facilities),
    SHALLOW GAS (drilling to investigate shallow gas before the first 'real' drilling on the location),
    PILOT (drilling to investigate the geology and fluid connectors for location of the main wellbore),
    SCIENTIFIC (drilling according to Law of Scientific research and exploration),
    STRATIGRAPHIC (driling according to Law of Petroleum activities §2-1).
    WILDCAT
    Status
    Status for the wellbore. Legal values are:

    BLOWOUT: A blowout has occurred in the well.
    CLOSED: A development wellbore that has been closed in a shorter or longer periode. Also applies to development wellbores where drilling is completed, but production/injection has not yet been reported.
    DRILLING: The well is in the drilling phase - can be active drilling, logging, testing or plugging,
    JUNKED: The drilling operation has been terminated due to technical problems.
    P&A: Exploration: The well is plugged and abandoned, and can not be reentered for further use. Development wells: The production/injection from/to the well is stopped and the well is plugged. The wellhead is removed or else made unavailable for further well operations.
    PLUGGED: The wellbore has been plugged, but the upper parts of the wellbore can be re-used. A sidetrack might be drilled at a later stage.
    PRODUCING: It was produced from the wellbore at the time of the operators last monthly report to the Norwegian Offshore Directorate.
    INJECTING: It was injected to the wellbore at the time of the operators last monthly report to the Norwegian Offshore Directorate.
    PREDRILLED: The upper part of the well has been drilled, usually as part of a batch-drilling campaign covering several wellbores.
    RE-CLASS TO DEV: Exploration wellbore that is reclassified to a development wellbore.
    RE-CLASS TO TEST: Exploration wellbore that is reclassified to test production.
    SUSPENDED: The drilling operation in the wellbore has been temporarily stopped. The current plan is to continue drilling later on.
    P&A
    Factmaps in new window
    Main area
    Name of the area on the Norwegian Continental Shelf where the wellbore is located. Legal values: BARENTS SEA, NORWEGIAN SEA, NORTH SEA.
    NORTH SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    2/8-14
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    ANO83- 14 & SP. 270
    Production licence
    Official designation of the production licence the wellbore was drilled or planned to be drilled from ( well head posistion).
    Drilling operator
    Name of the licensee starting the drilling operation on behalf of the active production license (well head position). This will usually equal the operator of the production license.
    Amoco Norway Oil Company
    Drill permit
    The drilling permit number together with the version of the drilling permit as stated in the drilling permit granted by the Norwegian Offshore Directorate.
    647-L
    Drilling facility
    Norwegian Offshore Directorate's name of the facility which the wellbore was drilled from.
    Drilling days
    Number of days from wellbore entry to wellbore completion.
    162
    Entered date
    The date when he wellbore was spudded. For sidetracks: The date when new formation was drilled by kicking off from the mother-wellbore,
    14.08.1990
    Completed date
    Exploration wellbores from moveable facilities:
    For floating facilities - date when anchor handling is started. For jackups - date the jacking-down started. Exploration wellbores from fixed facilities and all development wellbores:
    Date when the wellbore is at total depth, and last casing, liner or screen is set. In case of immediate plugging of the wellbore, completed date equals the date the last plug i set in the wellbore.
    Date when the wellbore is at total depth, and last casing, liner or screen is set. In case of immediate plugging of the wellbore, completed date equals the date the last plug i set in the wellbore.
    22.01.1991
    Release date
    Date when raw data which has been reported to the authorities from the wellbore is not confidential any longer. Normally 2 years after finishing the drilling. May be earlier if the area of the production license is relinquished.
    22.01.1993
    Publication date
    Date quality control of the wellbore information was completed, so it can be published on the internet as a 'Well Data Summary Sheet' wellbore with more information available than other wellbores.
    16.10.2012
    Purpose - planned
    Pre-drill purpose of the wellbore. Legal values for exploration wellbores: WILDCAT, APPRAISAL, WILDCAT-CCS, APPRAISAL-CCS. Example of legal values for development wellbores: OBSERVATION, PRODUCTION, INJECTION.
    WILDCAT
    Reentry
    Status whether the wellbore has been re-entered (YES) or not (NO). Re-entered wellbores are not included in the count when wellbores are presented in statistical overviews.
    NO
    Content
    For exploration wellbores, status of discovery.

    Legal values:
    DRY, SHOWS (trace amounts of hydrocarbons), GAS, GAS/CONDENSATE, OIL or OIL/GAS.
    SHOWS (GAS SHOWS, OIL SHOWS or OIL/GAS SHOWS) are detected as fluorescent cut (organic extract), petroleum odour, or visual stain on cuttings or cores, or as increased gas reading on the mud-loggers gas detection equipment.
    Legal values for WILDCAT-CCS and APPRAISAL-CCS: WATER

    For development wellbores, type of produced/injected fluid.
    Legal values:
    WATER, CUTTINGS, NOT AVAILABLE, OIL, GAS/CONDENSATE, OIL/GAS, CO2, GAS, WATER/GAS, NOT APPLICABLE.
    OIL SHOWS
    Discovery wellbore
    Indicator which tells if the wellbore made a new discovery. Legal values: YES, NO. Prior to press-release or other information regarding drilling results, the indicator will be “NO” as a default.
    NO
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    22.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    67.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4392.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    152
    Oldest penetrated age
    Age (according to Geologic Time Scale 2004 by F. M. Gradstein, et al. (2004)) of the oldest penetrated formation. May differ from age at TD for example in deviated wellbores. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EARLY PERMIAN, EARLY TRIASSIC, EOCENE.
    LATE JURASSIC
    Oldest penetrated formation
    Name of the oldest lithostratigraphic unit penetrated by the wellbore. Shown only for released wells. In most wellbores this is formation or group at total depth. May differ from formation or group at TD for example in wellbores drilled with high deviation or through faults. Examples of legal values: AMUNDSEN FM, BALDER FM, BASEMENT, BLODØKS FM, BRYNE FM, BURTON FM, COOK FM, DRAKE FM, DRAUPNE FM, EKOFISK FM, DUNLIN GP.
    FARSUND FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 15' 48.93'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 21' 23.11'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6235612.57
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    522078.60
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    31
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    1552

  • Wellbore history
    General
    Well 2/8-14 was drilled on a complexly faulted anticline situated below the western flank of the Valhall Field (designated as the West Valhall prospect) in the southern North Sea. The primary objective was to test a late Jurassic "wedge" sandstone. The secondary objective was Late Jurassic, Volgian age, sandstones. The well would also determine reservoir quality of the Shetland Group chalk sequences. The planned total depth of the well was 5622 m.
    Operations and results
    Wildcat well 2/8-14 was spudded with the semi-submersible installation West Vanguard on 14 August 1990. No shallow gas zones were penetrated in the well. The well penetrated high pore pressures at 3176 m in the Lower Cretaceous that required plugging back the well and setting an 11 3/4" liner. High pore pressures were again penetrated at 4274 m in the Late Jurassic. Due to well control considerations, the hole was plugged back and sidetracked below approximately 3797 m before setting a 7" liner at 4202 m. Further down high pore pressures again forced a premature end to the well with TD at 4397 m in the Late Jurassic (Late Kimmeridgian) Farsund Formation. The well was drilled with seawater and pre-hydrated bentonite down to 952 m, with KCl/PHPA/Polydrill mud from 952 m to 2560 m, with AncoTemp Polydrill/Ancoresin PHPA from 2560 m to 3855 m, and with AncoTemp Polydrill/Hostadrill PHPA mud from 3855 m to TD.
    Top Shetland Group Chalk (Tor Formation) was encountered at 2614 m with a 73% mud gas peak and good oil shows. The Tor Formation was 3 m thick and the underlying Hod Formation was 225 m thick. The pressures in the Tor and in the Hod chalk formations were depleted due to production from the Valhall Field as expected. Top Tyne Group, Mandal Formation came in at 3188 m. No significant Volgian age sandstones were penetrated in the well. The primary objective Late Jurassic "Wedge Sandstones" were not penetrated. The well had oil shows of variable quality in all types of lithology virtually all through from 1510 m to TD, except for an interval from 2778 m in the lower Hod Formation to 2929 m in the Sola Formation.
    No cores were cut and no wire line fluid samples were taken.
    The well was permanently abandoned on 22 January 1991 as a dry well with shows.
    Testing
    No drill stem test was performed.

  • Cuttings at the Norwegian Offshore Directorate
    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    YES
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    960.00
    4392.00

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.12
    pdf
    20.45

  • Documents – reported by the production licence (period for duty of secrecy expired)
    Documents – reported by the production licence (period for duty of secrecy expired)
    Document name
    Document format
    Document size [MB]
    pdf
    2.32
    pdf
    16.99
    pdf
    25.14
    pdf
    35.46
    pdf
    39.66
    pdf
    39.66

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    4ARM CAL
    2549
    3067
    4ARM DIP GR
    2549
    3077
    4ARM DIP GR
    3064
    3248
    ACSIG
    2550
    2910
    ACSIG
    3064
    3248
    CBL VDL GR
    405
    2549
    CBL VDL GR
    2414
    3064
    CBL VDL GR
    3107
    4206
    CBL VDL GR
    3234
    4500
    COREGUN GR
    3102
    3245
    COREGUN GR
    3300
    4202
    COREGUN GR
    3496
    4206
    COREGUN GR
    4212
    3295
    DIFL AC GR CAL
    3064
    3248
    DIFL AC SP GR
    4130
    4396
    DIFL AC ZDL CN GR
    2549
    3075
    DIFL AC ZDL CN SP GR CAL
    3151
    4207
    HP FMMT GR
    4211
    4282
    HP FMT GR
    2615
    2690
    HP FMT GR
    3101
    3239
    MWD - DPR EMW RES GR DIR
    595
    687
    MWD - RGD SN RES GR DIR
    193
    595
    MWD - RGD SN RES GR DIR
    687
    4274
    MWD - RGD SN RES GR DIR
    3797
    4202
    SWING ARM DIP GR
    3234
    4208
    SWING ARM DIP GR
    4206
    4397
    VELOCITY
    2614
    3780
    VELOCITY
    4150
    4390
    VSP
    2580
    4190
    ZDL CN GR CAL
    3064
    3248
    ZDL CN GR CAL
    4153
    4396

  • Casing and leak–off tests
    Casing and leak–off tests
    Casing type
    Casing diam.
    [inch]
    Casing depth
    [m]
    Hole diam.
    [inch]
    Hole depth
    [m]
    LOT/FIT mud eqv.
    [g/cm3]
    Formation test type
    CONDUCTOR
    30
    185.0
    36
    193.0
    0.00
    LOT
    INTERM.
    20
    945.0
    26
    952.0
    1.74
    LOT
    INTERM.
    13 3/8
    2549.0
    17 1/2
    2560.0
    1.90
    LOT
    LINER
    11 3/4
    3062.0
    15
    3068.0
    2.05
    LOT
    INTERM.
    9 5/8
    3234.0
    10 5/8
    3248.0
    2.07
    LOT
    LINER
    7
    4202.0
    8 1/2
    4274.0
    2.23
    LOT
    OPEN HOLE
    4392.0
    5 7/8
    4392.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    190
    1.09
    8.0
    WATER BASED
    280
    1.09
    42.0
    WATER BASED
    330
    1.41
    WATER BASED
    545
    1.04
    45.0
    WATER BASED
    687
    1.06
    40.0
    WATER BASED
    959
    1.20
    10.0
    WATER BASED
    1157
    1.22
    13.0
    WATER BASED
    1288
    1.70
    16.0
    WATER BASED
    1410
    1.49
    21.0
    WATER BASED
    1639
    1.68
    24.0
    WATER BASED
    1919
    1.70
    19.0
    WATER BASED
    2035
    1.70
    18.0
    WATER BASED
    2340
    1.70
    18.0
    WATER BASED
    2469
    1.93
    10.0
    WATER BASED
    2560
    1.73
    15.0
    WATER BASED
    2759
    1.67
    14.0
    WATER BASED
    2898
    1.70
    16.0
    WATER BASED
    2984
    1.73
    16.0
    WATER BASED
    3044
    1.73
    19.0
    WATER BASED
    3170
    2.08
    21.0
    WATER BASED
    3176
    1.86
    20.0
    WATER BASED
    3181
    1.91
    18.0
    WATER BASED
    3239
    1.93
    25.0
    WATER BASED
    3248
    1.93
    24.0
    WATER BASED
    3263
    1.93
    21.0
    WATER BASED
    3324
    1.92
    23.0
    WATER BASED
    3374
    1.92
    24.0
    WATER BASED
    3403
    1.96
    21.0
    WATER BASED
    3468
    1.92
    21.0
    WATER BASED
    3554
    1.96
    24.0
    WATER BASED
    3604
    1.96
    24.0
    WATER BASED
    3650
    1.96
    25.0
    WATER BASED
    3721
    1.96
    24.0
    WATER BASED
    3729
    2.02
    22.0
    WATER BASED
    3784
    2.02
    21.0
    WATER BASED
    3810
    1.96
    26.0
    WATER BASED
    3815
    2.02
    24.0
    WATER BASED
    3851
    2.02
    26.0
    WATER BASED
    3875
    1.98
    24.0
    WATER BASED
    3882
    2.02
    26.0
    WATER BASED
    3905
    1.98
    25.0
    WATER BASED
    3906
    2.02
    26.0
    WATER BASED
    3906
    2.02
    26.0
    WATER BASED
    3911
    2.02
    25.0
    WATER BASED
    3987
    1.98
    24.0
    WATER BASED
    4026
    2.02
    25.0
    WATER BASED
    4084
    1.98
    27.0
    WATER BASED
    4134
    2.02
    24.0
    WATER BASED
    4166
    1.98
    26.0
    WATER BASED
    4180
    2.18
    21.0
    WATER BASED
    4188
    2.02
    19.0
    WATER BASED
    4202
    2.02
    20.0
    WATER BASED
    4205
    2.02
    20.0
    WATER BASED
    4249
    2.08
    20.0
    WATER BASED
    4258
    1.98
    24.0
    WATER BASED
    4270
    2.00
    22.0
    WATER BASED
    4274
    2.02
    21.0
    WATER BASED
    4314
    2.00
    20.0
    WATER BASED
    4325
    2.12
    21.0
    WATER BASED
    4326
    2.12
    22.0
    WATER BASED
    4339
    2.16
    22.0
    WATER BASED
    4350
    2.18
    16.0
    WATER BASED
    4392
    2.16
    20.0
    WATER BASED

  • Pressure plots
    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.22