Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.12.2024 - 01:25
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34/8-6

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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.
    34/8-6
    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.
    34/8-6
    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.
    Norsk Hydro Produksjon 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.
    699-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.
    44
    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,
    21.09.1991
    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.
    03.11.1991
    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.
    03.11.1993
    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.
    27.02.2004
    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.
    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.
    23.5
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    376.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3950.0
    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).
    3948.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    3.8
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    122
    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.
    EARLY 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.
    DRAKE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 26' 31.36'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 28' 33.35'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6812300.64
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    472048.81
    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.
    1842

  • Wellbore history
    General
    Well 34/8-6 was designed to drill North of the Visund Field on a northerly trending arm of the Tampen Spur. The main structural feature in block 34/8, the A-structure, is a NNE-SSW oriented elongated rotated fault block with pre-Cretaceous strata dipping towards the WNW. The block contains the Visund field, and is divided into two compartments, the A-south and the A-north, by a central fault. The well will test a stratigraphic trap on the northwest flank of the A-structure. From seismic anomalies possible shallow gas was expected at 510 m, 544 m, 556 m, and 877 m. Levels at 544 m, and 556 m are dipping sand layers, and could contain gas with overpressure. Scattered boulders could be expected between 424and 540 m.
    The primary objective for well 34/8-6 was to test the presence of a hydrocarbon-bearing sand within the Upper Jurassic Draupne Formation, and was drilled close to the thickest portion of the interpreted turbidite sand. Secondary objectives were to drill through the Brent Group to yield more information about development and thickness control down dip of the structural crest, and to tag top of the Dunlin Group to permit a good seismic tie-in, which can be carried up dip towards the Visund reservoir.
    Operations and results
    Wildcat well 34/8-6 was spudded with the semi-submersible installation Transocean 8 on 21 September 1991 and at a depth of 3950 m in the Early Jurassic Drake Formation. The well was drilled with spud mud down to 1235 m and with KCl mud from 1235 m to TD. Drilling went on without any significant problems. Shallow gas indications were encountered during drilling of the 8 1/2" pilot hole at 541 m and 550 m, but caused no problems, and no gas was observed at the wellhead during drilling operations. The gas indications did not correspond with any of the predicted sand layers.
    There was no sandstone developed at the primary objective in the Draupne Formation. Crude oil appeared in the mud after penetrating a thin (1 m) limestone at 3180 m in the Kyrre Formation. Oil was seen in the mud down to 3500 m, but it was believed that it all came from the limestone at 3180 m. One core was cut in the Draupne Formation from 3572 m to 3584 m. Two runs of sidewall cores were attempted whereof 19 were recovered. The well was permanently abandoned on 3 November 1991 as a dry hole with hydrocarbon 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]
    1240.00
    3950.00

  • Cores at the Norwegian Offshore Directorate
    Cores at the Norwegian Offshore Directorate
    Core sample number
    Core sample - top depth
    Core sample - bottom depth
    Core sample depth - uom
    1
    3572.0
    3584.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    12.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 3572-3577m
    Core photo at depth: 3577-3582m
    Core photo at depth: 3582-3584m
    Core photo at depth:  
    Core photo at depth:  
    3572-3577m
    3577-3582m
    3582-3584m

  • 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
    485.0
    36
    486.5
    0.00
    LOT
    INTERM.
    18 5/8
    1219.0
    24
    1235.0
    0.00
    LOT
    INTERM.
    13 3/8
    2407.0
    17 1/2
    2423.0
    1.62
    LOT
    OPEN HOLE
    3950.0
    12 1/4
    3950.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST GR
    2450
    3930
    CST GR
    2515
    3930
    DIL LSS GR SP AMS
    485
    1202
    DIL LSS GR SP AMS
    1221
    2410
    DIL LSS GR SP AMS
    2402
    3948
    FMS-4 NGT AMS
    3100
    3940
    LDL CNL
    2402
    3948
    MWD GR RES DIR
    400
    3898
    RFT HP GR
    3686
    3825
    VSP
    1110
    3880

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.51

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.92

  • 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
    13.83

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    415
    1.36
    14.0
    5.0
    WATER BASED
    04.11.1991
    415
    1.46
    18.0
    6.0
    WATER BASED
    04.11.1991
    416
    1.05
    22.0
    17.0
    WATER BASED
    23.09.1991
    487
    1.20
    16.0
    9.0
    WATER BASED
    23.09.1991
    487
    1.20
    16.0
    9.0
    WATER BASED
    24.09.1991
    988
    1.20
    17.0
    9.0
    WATER BASED
    25.09.1991
    1089
    1.50
    19.0
    6.0
    WATER BASED
    04.11.1991
    1207
    1.20
    17.0
    9.0
    WATER BASED
    27.09.1991
    1235
    1.20
    16.0
    9.0
    WATER BASED
    01.10.1991
    1235
    1.20
    8.0
    8.0
    WATER BASED
    01.10.1991
    1235
    1.20
    17.0
    9.0
    WATER BASED
    27.09.1991
    1235
    1.20
    16.0
    8.0
    WATER BASED
    01.10.1991
    1674
    1.20
    12.0
    9.0
    WATER BASED
    01.10.1991
    2164
    1.30
    15.0
    13.0
    WATER BASED
    02.10.1991
    2231
    1.30
    14.0
    13.0
    WATER BASED
    03.10.1991
    2423
    1.35
    17.0
    14.0
    WATER BASED
    04.10.1991
    2423
    1.35
    18.0
    12.0
    WATER BASED
    07.10.1991
    2423
    1.35
    16.0
    10.0
    WATER BASED
    07.10.1991
    2423
    1.35
    16.0
    9.0
    WATER BASED
    08.10.1991
    2423
    1.35
    16.0
    9.0
    WATER BASED
    07.10.1991
    2439
    1.35
    14.0
    9.0
    WATER BASED
    09.10.1991
    2527
    1.41
    16.0
    10.0
    WATER BASED
    10.10.1991
    2780
    1.40
    17.0
    10.0
    WATER BASED
    11.10.1991
    3045
    1.40
    17.0
    9.0
    WATER BASED
    15.10.1991
    3166
    1.40
    17.0
    9.0
    WATER BASED
    15.10.1991
    3223
    1.45
    19.0
    10.0
    WATER BASED
    15.10.1991
    3278
    1.45
    19.0
    10.0
    WATER BASED
    17.10.1991
    3362
    1.45
    18.0
    10.0
    WATER BASED
    17.10.1991
    3365
    1.45
    19.0
    10.0
    WATER BASED
    18.10.1991
    3372
    1.50
    20.0
    11.0
    WATER BASED
    18.10.1991
    3372
    1.49
    17.0
    9.0
    WATER BASED
    21.10.1991
    3372
    1.49
    17.0
    9.0
    WATER BASED
    21.10.1991
    3422
    1.51
    19.0
    10.0
    WATER BASED
    21.10.1991
    3524
    1.60
    25.0
    10.0
    WATER BASED
    22.10.1991
    3576
    1.60
    25.0
    11.0
    WATER BASED
    23.10.1991
    3606
    1.60
    24.0
    9.0
    WATER BASED
    24.10.1991
    3690
    1.61
    25.0
    9.0
    WATER BASED
    25.10.1991
    3795
    1.61
    25.0
    10.0
    WATER BASED
    29.10.1991
    3950
    1.60
    23.0
    8.0
    WATER BASED
    29.10.1991
    3950
    1.60
    23.0
    8.0
    WATER BASED
    29.10.1991
    3950
    1.60
    25.0
    10.0
    WATER BASED
    31.10.1991
    3950
    1.50
    17.0
    4.0
    WATER BASED
    01.11.1991

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1610.0
    [m]
    DC
    RRI
    1630.0
    [m]
    DC
    RRI
    1650.0
    [m]
    DC
    RRI
    1670.0
    [m]
    DC
    RRI
    1690.0
    [m]
    DC
    RRI
    1710.0
    [m]
    DC
    RRI
    1720.0
    [m]
    DC
    RRI
    1750.0
    [m]
    DC
    RRI
    1770.0
    [m]
    DC
    RRI
    1790.0
    [m]
    DC
    RRI
    1810.0
    [m]
    DC
    RRI
    1830.0
    [m]
    DC
    RRI
    1850.0
    [m]
    DC
    RRI
    1870.0
    [m]
    DC
    RRI
    1890.0
    [m]
    DC
    RRI
    1910.0
    [m]
    DC
    RRI
    1920.0
    [m]
    DC
    RRI
    1930.0
    [m]
    DC
    RRI
    1960.0
    [m]
    DC
    RRI
    1980.0
    [m]
    DC
    RRI
    2000.0
    [m]
    DC
    RRI
    2020.0
    [m]
    DC
    RRI
    2050.0
    [m]
    DC
    RRI
    2070.0
    [m]
    DC
    RRI
    2090.0
    [m]
    DC
    RRI
    2110.0
    [m]
    DC
    RRI
    2130.0
    [m]
    DC
    RRI
    2150.0
    [m]
    DC
    RRI
    2485.0
    [m]
    SWC
    HYDRO
    2667.0
    [m]
    SWC
    HYDRO
    3246.0
    [m]
    SWC
    HYDRO
    3284.5
    [m]
    SWC
    HYDRO
    3305.5
    [m]
    SWC
    HYDRO
    3325.0
    [m]
    SWC
    HYDRO
    3370.0
    [m]
    SWC
    HYDRO
    3401.0
    [m]
    SWC
    HYDRO
    3488.0
    [m]
    SWC
    HYDRO
    3572.0
    [m]
    C
    HYDRO
    3574.8
    [m]
    C
    HYDRO
    3576.0
    [m]
    C
    HYDRO
    3579.2
    [m]
    C
    HYDRO
    3582.0
    [m]
    C
    HYDRO
    3584.1
    [m]
    C
    HYDRO
    3632.0
    [m]
    SWC
    HYDRO
    3676.0
    [m]
    SWC
    HYDRO