Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.11.2024 - 09:09
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8/11-1

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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.
    8/11-1
    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
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    8/11-1
    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.
    Phillips Petroleum Company Norway
    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.
    126-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.
    67
    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,
    24.04.1975
    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.
    29.06.1975
    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.
    29.06.1977
    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.
    24.09.2004
    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.
    DRY
    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.
    27.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    64.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3810.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    4.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    107
    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.
    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.
    SMITH BANK FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    57° 6' 32'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 38' 25'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6329831.02
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    538783.43
    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.
    304

  • Wellbore history
    General
    Well 8/11-1 is located on the Sørvestlandet High towards the Åsta Graben. It was drilled on a crestal position of an elongated faulted anticline approximately 11 km long and 5 km wide. The primary objective horizon was the Jurassic Sandstone section, which from seismic information was expected to have closure of 39 km2 with a maximum of 66 m of vertical closure. Late Cretaceous limestone, Paleocene sandstone and Triassic Sandstone were secondary objectives.
    Operations and results
    Wildcat well 8/11-1 was spudded with the semi-submersible installation Ocean Viking on 24 April 1975 and drilled to TD at 3810 m in the Triassic Red beds. The well was drilled with seawater and Attapulgite clay down to 458 m, with seawater/Drispac and 3% diesel oil from 458 m to 1219 m, and with seawater/Drispac/lime/4-5% diesel oil from 1219 m to TD.
    The formation tops and thicknesses agreed well with the geological prognosis with Paleocene coming in at 1968 m, top Cretaceous at 2143 m, the Jurassic at 2807 m, and top Triassic in the interval 2855 m to 2900 m. In the Paleocene, no sands were developed and in the Upper Cretaceous the limestone was tight. The Jurassic section consisted of 27.4 m of dark grey shale of Portlandian - Late Kimmeridgian age. The total sand section had been eroded away by the Kimmeridgian unconformity. After drilling 975 m of barren Triassic section the well was terminated at the prognosed depth of 3810 m without the Zechstein salt having been encountered. The well had no shows and thus no testing was carried out. No conventional core was cut and no fluid sample taken.
    The well was permanently abandoned on 29 June 1975 as a dry well.
    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]
    457.20
    3810.00

  • 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
    126.0
    36
    130.0
    0.00
    LOT
    SURF.COND.
    20
    457.0
    26
    460.0
    0.00
    LOT
    INTERM.
    13 3/8
    1219.0
    17 1/2
    1220.0
    0.00
    LOT
    INTERM.
    9 5/8
    2865.0
    12 1/4
    2865.0
    0.00
    LOT
    LINER
    7
    3810.0
    8 1/2
    3810.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHCS
    1139
    3800
    GR
    1139
    3800
    IES
    1139
    3800
    SP
    1139
    3800

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.27

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    4.89

  • 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
    6.69

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    126
    1.05
    seawater
    457
    1.25
    seawater
    1219
    1.31
    45.0
    seawater
    1524
    1.37
    50.0
    seawater
    2133
    1.43
    55.0
    seawater
    2865
    1.61
    55.0
    seawater
    3810
    1.67
    50.0
    seawater

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    5940.0
    [ft]
    DC
    RRI
    6000.0
    [ft]
    DC
    RRI
    6060.0
    [ft]
    DC
    RRI
    6120.0
    [ft]
    DC
    RRI
    6180.0
    [ft]
    DC
    RRI
    6210.0
    [ft]
    DC
    RRI
    6240.0
    [ft]
    DC
    RRI
    6270.0
    [ft]
    DC
    RRI
    6330.0
    [ft]
    DC
    RRI
    6390.0
    [ft]
    DC
    RRI
    6420.0
    [ft]
    DC
    RRI
    6450.0
    [ft]
    DC
    RRI
    6510.0
    [ft]
    DC
    RRI
    6570.0
    [ft]
    DC
    RRI
    6630.0
    [ft]
    DC
    RRI
    6690.0
    [ft]
    DC
    RRI
    6750.0
    [ft]
    DC
    RRI
    6780.0
    [ft]
    DC
    RRI
    6810.0
    [ft]
    DC
    RRI
    6870.0
    [ft]
    DC
    RRI
    6930.0
    [ft]
    DC
    RRI
    6990.0
    [ft]
    DC
    RRI
    7050.0
    [ft]
    DC
    RRI
    9180.0
    [ft]
    DC
    GEUS
    9180.0
    [ft]
    DC
    PETROSTR
    9210.0
    [ft]
    DC
    PETROS
    9210.0
    [ft]
    DC
    GEUS
    9270.0
    [ft]
    DC
    GEUS
    9270.0
    [ft]
    DC
    PETROSTR
    9330.0
    [ft]
    DC
    PETROS
    9360.0
    [ft]
    DC
    PETROS
    9390.0
    [ft]
    DC
    PETROS
    9420.0
    [ft]
    DC
    PETROS
    9630.0
    [ft]
    DC
    GEUS
    9660.0
    [ft]
    DC
    GEUS
    9690.0
    [ft]
    DC
    GEUS
    9720.0
    [ft]
    DC
    GEUS
    9750.0
    [ft]
    DC
    GEUS
    10080.0
    [ft]
    DC
    GEUS
    10440.0
    [ft]
    DC
    GEUS