Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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31.10.2024 - 01:27
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34/8-18 S

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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.
    34/8-18 S
    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.
    PLUGGED
    Press release
    Multilateral
    Indicator telling if the parent well is multilateral, meaning it has more than one branch radiating from the main borehole. Example of legal values: YES, NO. See also Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    NO
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    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
    Field
    Name of the field the wellbore is related to.
    Discovery
    Name of the discovery the wellbore is related to.
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    34/8-18
    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.
    Equinor Energy AS
    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.
    1731-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.
    14
    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,
    09.02.2019
    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.
    22.02.2019
    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.
    22.02.2021
    Plugged date
    Date when plugging operations was finished, as reported by the operator to the Norwegian Offshore Directorate through DDRS (Daily Drilling Reporting System).
    22.02.2019
    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.
    30.04.2021
    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
    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
    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.
    YES
    1st level with HC, age
    Age of lithostratigraphic unit, 1st level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE. See also Norwegian Offshore Directorate bulletins.
    EARLY JURASSIC
    1st level with HC, formation
    Name of lithostartigraphic unit, 1st level, where hydrocarbons were encountered. Shown only for released wells. Examples of legal values: BASEMENT, COOK FM, EKOFISK FM, HEIMDAL FM, SANDNES FM, SOGNEFJORD FM, TARBERT FM, BRENT GP. See also Norwegian Offshore Directorate bulletins.
    STATFJORD GP
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    29.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    335.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    6068.0
    Final vertical depth (TVD) [m RKB]
    Vertical elevation from total depth to kelly bushing. Shown only for released wells. Referred to as true vertical depth (TVD).
    3327.0
    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 TRIASSIC
    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.
    LUNDE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 22' 13.34'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 27' 34.38'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6804323.95
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    471109.05
    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.
    8607
  • Wellbore history

    General
    Well 34/8-18 S was drilled on a highly tilted fault block downfaulted east of the Visund Main Field on Tampen spur in the North Sea. The primary objective of the well was to prove petroleum in the Telesto prospect in Early Jurassic reservoir rocks (the Statfjord group).
    Operations and results
    Wildcat well 34/8-18 S was drilled from the Visund platform, as a side-track to oil producer 34/8-A-36 H. It was kicked off below the 9 5/8” shoe at 3619 m in the Shetland Group on 9 February 2019. It was drilled with an 8 1/2” bit, in one bit run, all through to TD at 6068 m (3327 m TVD) m in the Late Triassic Lunde Formation. The well was drilled highly deviated (ca 87° inclination through most of Shetland Group). Operations proceeded without significant problems. The well was drilled with RheGuard oil-based mud from kick-off to TD.
    The well drilled ca 3 km of Shetland Group before Cromer Knoll came in at 5679 m and a thin Viking Group at 5692 m. The whole of Brent Group and the upper part of the Dunlin Group was eroded in-well. Top Statfjord Group was penetrated at 5769 m (3082 m TVD). The well encountered a gross oil column of about 115 metres in the upper and lower part of the Statfjord group, with effective reservoir of 17 and 20 metres, respectively, in sandstone mainly with moderate reservoir quality. Pressure data showed initial pressure in the reservoir sands, but the HC filled reservoir in the lower Statfjord had slightly higher pressure (ca 5 bar) than the upper Statfjord. Observations showed a contact in upper Statfjord at 5849 m (3139 m TVD), and an oil-down-to/water-up-to at 5916.5/ 5925 m (3193/3200 m TVD) in lower Statfjord . In the upper part of the Lunde formation, about 15 metres of water-bearing sandstone with poor reservoir quality was encountered. No shows were recorded in the well
    No cores were cut. No fluid sample was taken.
    The well was plugged on 22 February as an oil discovery.
    Testing
    No drill stem test was performed.
  • 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
    36
    438.0
    42
    454.0
    0.00
    SURF.COND.
    20
    1338.1
    26
    1349.0
    1.60
    FIT
    INTERM.
    13 3/8
    2408.5
    17 1/2
    2420.0
    1.66
    FIT
    LINER
    9 5/8
    3617.2
    12 1/4
    3619.0
    1.85
    FIT
    OPEN HOLE
    6068.0
    8 1/2
    6068.0
    0.00
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MWD LWD - GR
    365
    454
    MWD LWD - GR RES
    454
    3617
    MWD LWD - GR RES DEN NEU CAL SON
    3619
    6068
  • Lithostratigraphy

  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    5627
    1.70
    49.0
    RheGuard
    5803
    1.70
    48.0
    RheGuard
    6068
    1.70
    57.0
    RheGuard
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    5650.0
    [m]
    DC
    PETROS
    5660.0
    [m]
    DC
    PETROS
    5670.0
    [m]
    DC
    PETROS
    5680.0
    [m]
    DC
    PETROS
    5685.0
    [m]
    DC
    PETROS
    5690.0
    [m]
    DC
    PETROS
    5695.0
    [m]
    DC
    PETROS
    5700.0
    [m]
    DC
    PETROS
    5705.0
    [m]
    DC
    PETROS
    5710.0
    [m]
    DC
    PETROS
    5715.0
    [m]
    DC
    PETROS
    5725.0
    [m]
    DC
    PETROS
    5735.0
    [m]
    DC
    PETROS
    5745.0
    [m]
    DC
    PETROS
    5755.0
    [m]
    DC
    PETROS
    5760.0
    [m]
    DC
    PETROS
    5765.0
    [m]
    DC
    PETROS
    5770.0
    [m]
    DC
    PETROS
    5775.0
    [m]
    DC
    PETROS
    5780.0
    [m]
    DC
    PETROS
    5785.0
    [m]
    DC
    PETROS
    5790.0
    [m]
    DC
    PETROS
    5800.0
    [m]
    DC
    PETROS
    5810.0
    [m]
    DC
    PETROS
    5820.0
    [m]
    DC
    PETROS
    5830.0
    [m]
    DC
    PETROS
    5840.0
    [m]
    DC
    PETROS
    5850.0
    [m]
    DC
    PETROS
    5860.0
    [m]
    DC
    PETROS
    5870.0
    [m]
    DC
    PETROS
    5880.0
    [m]
    DC
    PETROS
    5890.0
    [m]
    DC
    PETROS
    5900.0
    [m]
    DC
    PETROS
    5910.0
    [m]
    DC
    PETROS
    5920.0
    [m]
    DC
    PETROS
    5930.0
    [m]
    DC
    PETROS
    5940.0
    [m]
    DC
    PETROS
    5950.0
    [m]
    DC
    PETROS
    5960.0
    [m]
    DC
    PETROS
    5970.0
    [m]
    DC
    PETROS
    5980.0
    [m]
    DC
    PETROS
    5990.0
    [m]
    DC
    PETROS
    6000.0
    [m]
    DC
    PETROS
    6010.0
    [m]
    DC
    PETROS
    6020.0
    [m]
    DC
    PETROS
    6030.0
    [m]
    DC
    PETROS
    6040.0
    [m]
    DC
    PETROS
    6050.0
    [m]
    DC
    PETROS
    6060.0
    [m]
    DC
    PETROS
    6068.0
    [m]
    DC
    PETROS