Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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26.11.2024 - 01:27
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15/9-4

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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.
    15/9-4
    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).
    APPRAISAL
    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
    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
    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.
    15/9-4
    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.
    Den norske stats oljeselskap a.s
    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.
    213-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.
    72
    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,
    04.04.1979
    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.
    14.06.1979
    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.
    14.06.1981
    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.
    08.04.2015
    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.
    GAS/CONDENSATE
    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
    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.
    MIDDLE 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.
    HUGIN FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    102.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3716.0
    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).
    3716.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1.9
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    112
    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.
    SKAGERRAK FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    58° 24' 0.26'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 47' 6.93'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6474041.91
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    428999.05
    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.
    325

  • Wellbore history
    General
    Well 15/9-4 was drilled on in the southeastern part of the Sleipner Vest area in the Viking Graben of the North Sea. Previously four wells had been drilled on the Sleipner Alpha structure in the north. Two of these showed significant gas-condensate accumulations (15/6-3 and 15/9-1) in the middle Jurassic while in the western part of the Alpha structure the sand had shaled out (15/9-3). In the northeast, the sand was penetrated below the hydrocarbon/water contact (15/6-5). The first well drilled on the Beta prospect (15/9-2) showed a significant gas-condensate column in the middle Jurassic sand. The primary objective for well 15/9-4 was to test possible hydrocarbons in Middle Jurassic sandstones in the southeast extending Delta structure.
    Operations and results
    Well 15/9-4 was spudded with the semi-submersible installation Ross Rig on 4 April 1979 and drilled to TD at 3716 m in the Triassic Skagerrak Formation. Very few problems were encountered during drilling of this well, with the exception of lost circulation in the 26" interval. This problem was solved by pumping cement into the formation. The main problem arose only after drilling the 8 1/2” interval. The 7" liner was run and cemented sucessfully. When pressure was applied in order to test the liner lap, the 9 5/8" casing burst. The well was drilled with spud mud down to 415 m and with gel/lignosulphonate mud from 402 m to TD.
    Top of the Middle Jurassic Vestland Group, Hugin Formation was penetrated at 3441 m. The section contained sandstones with good reservoir properties interbedded with some thin shale beds. The sandstones were hydrocarbon bearing with a gas-water contact at ca 3570 m, 7 m into the Sleipner Formation. Weak oil shows were described throughout the hydrocarbon-bearing reservoir down to 3582 m. Shows were not described in any other section of the well. The Triassic Skagerrak Formation was encountered at 3629 m with some small water bearing sand intervals.
    Nine cores were cut in the interval 3457 to 3594.8 m in the Hugin and Sleipner formations. The core-log depth shift is reported as -2.5 m for all cores. Overall recovery was 132.1 m core (98.2%). An RFT fluid sample was taken at 3481 m. It contained gas, condensate, mud and water.
    The well was permanently abandoned on 14 June 1979 as a gas/condensate appraisal well.
    Testing
    The well was not production tested, due to technical problems.

  • 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]
    180.00
    3704.00

  • 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
    3457.0
    3475.2
    [m ]
    2
    3457.3
    3493.1
    [m ]
    3
    3493.1
    3510.9
    [m ]
    4
    3510.9
    3528.8
    [m ]
    5
    3528.9
    3544.2
    [m ]
    6
    3544.2
    3556.0
    [m ]
    7
    3557.0
    3566.7
    [m ]
    8
    3569.0
    3584.8
    [m ]
    9
    3587.0
    3594.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    150.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 3457-3459m
    Core photo at depth: 3459-3462m
    Core photo at depth: 3462-3465m
    Core photo at depth: 3465-3467m
    Core photo at depth: 3467-3470m
    3457-3459m
    3459-3462m
    3462-3465m
    3465-3467m
    3467-3470m
    Core photo at depth: 3470-3473m
    Core photo at depth: 3473-3475m
    Core photo at depth: 3475-3478m
    Core photo at depth: 3478-3480m
    Core photo at depth: 3480-3483m
    3470-3473m
    3473-3475m
    3475-3478m
    3478-3480m
    3480-3483m
    Core photo at depth: 3483-3486m
    Core photo at depth: 3486-3488m
    Core photo at depth: 3488-3491m
    Core photo at depth: 3491-3493m
    Core photo at depth: 3493-3495m
    3483-3486m
    3486-3488m
    3488-3491m
    3491-3493m
    3493-3495m
    Core photo at depth: 3495-3498m
    Core photo at depth: 3498-3501m
    Core photo at depth: 3501-3503m
    Core photo at depth: 3503-3506m
    Core photo at depth: 3506-3509m
    3495-3498m
    3498-3501m
    3501-3503m
    3503-3506m
    3506-3509m
    Core photo at depth: 3510-3513m
    Core photo at depth: 3513-3516m
    Core photo at depth: 3516-3519m
    Core photo at depth: 3519-3521m
    Core photo at depth: 3521-3524m
    3510-3513m
    3513-3516m
    3516-3519m
    3519-3521m
    3521-3524m
    Core photo at depth: 3524-3527m
    Core photo at depth: 3528-3531m
    Core photo at depth: 3531-3534m
    Core photo at depth: 3534-3537m
    Core photo at depth: 3539-3542m
    3524-3527m
    3528-3531m
    3531-3534m
    3534-3537m
    3539-3542m
    Core photo at depth: 3542-3544m
    Core photo at depth: 3537-3539m
    Core photo at depth: 3544-3546m
    Core photo at depth: 3546-3549m
    Core photo at depth: 3549-3552m
    3542-3544m
    3537-3539m
    3544-3546m
    3546-3549m
    3549-3552m
    Core photo at depth: 3552-3555m
    Core photo at depth: 3555-3556m
    Core photo at depth: 3557-3559m
    Core photo at depth: 3559-3561m
    Core photo at depth: 3561-3564m
    3552-3555m
    3555-3556m
    3557-3559m
    3559-3561m
    3561-3564m
    Core photo at depth: 3564-3566m
    Core photo at depth: 3566-3567m
    Core photo at depth: 3569-3571m
    Core photo at depth: 3573-3576m
    Core photo at depth: 3576-3578m
    3564-3566m
    3566-3567m
    3569-3571m
    3573-3576m
    3576-3578m
    Core photo at depth: 3578-3581m
    Core photo at depth: 3581-3583m
    Core photo at depth: 3583-3584m
    Core photo at depth: 3587-3589m
    Core photo at depth: 3589-3591m
    3578-3581m
    3581-3583m
    3583-3584m
    3587-3589m
    3589-3591m
    Core photo at depth: 3591-3594m
    Core photo at depth: 3594-3595m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    3591-3594m
    3594-3595m

  • 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
    165.0
    36
    166.0
    0.00
    LOT
    SURF.COND.
    20
    402.0
    26
    415.0
    1.63
    LOT
    INTERM.
    13 3/8
    1403.0
    17 1/2
    1420.0
    1.79
    LOT
    INTERM.
    9 5/8
    3206.0
    12 1/4
    3220.0
    0.00
    LOT
    LINER
    7
    3710.0
    8 1/2
    3726.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL
    150
    1399
    CBL VDL
    1359
    3664
    DLL MSFL
    3202
    3711
    FDC CNL CAL GR
    400
    3711
    HDT
    3202
    3711
    ISF SON GR SP
    411
    3709
    RFT
    3203
    0
    VELOCITY
    620
    3705

  • Lithostratigraphy

  • 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
    26.48

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    832
    1.12
    42.0
    waterbased
    1376
    1.20
    41.0
    waterbased
    1420
    1.30
    37.0
    waterbased
    1867
    1.35
    47.0
    waterbased
    3473
    1.40
    53.0
    waterbased
    3691
    1.38
    44.0
    waterbased

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2420.0
    [m]
    DC
    RRI
    2435.0
    [m]
    DC
    RRI
    2450.0
    [m]
    DC
    RRI
    2465.0
    [m]
    DC
    RRI
    2480.0
    [m]
    DC
    RRI
    2498.0
    [m]
    DC
    RRI
    2510.0
    [m]
    DC
    RRI
    2522.0
    [m]
    DC
    RRI
    2540.0
    [m]
    DC
    RRI
    2555.0
    [m]
    DC
    RRI
    2573.0
    [m]
    DC
    RRI
    2588.0
    [m]
    DC
    RRI
    2600.0
    [m]
    DC
    RRI
    2615.0
    [m]
    DC
    RRI
    2624.0
    [m]
    DC
    RRI
    2645.0
    [m]
    DC
    RRI
    2654.0
    [m]
    DC
    RRI
    2663.0
    [m]
    DC
    RRI
    2675.0
    [m]
    DC
    RRI
    2684.0
    [m]
    DC
    RRI
    2693.0
    [m]
    DC
    RRI
    2726.0
    [m]
    DC
    RRI
    2750.0
    [m]
    DC
    RRI
    2768.0
    [m]
    DC
    RRI
    2771.0
    [m]
    DC
    RRI
    3248.0
    [m]
    DC
    3278.0
    [m]
    DC
    3308.0
    [m]
    DC
    3338.0
    [m]
    DC
    3368.0
    [m]
    DC
    3398.0
    [m]
    DC
    3428.0
    [m]
    DC
    3430.0
    [m]
    SWC
    3433.0
    [m]
    SWC
    3440.0
    [m]
    SWC
    3458.0
    [m]
    DC
    3472.0
    [m]
    C
    3477.0
    [m]
    C
    3480.0
    [m]
    C
    3481.0
    [m]
    C
    3491.5
    [m]
    C
    3493.0
    [m]
    C
    3494.0
    [m]
    DC
    3495.0
    [m]
    C
    3506.0
    [m]
    C
    3524.0
    [m]
    DC
    3531.0
    [m]
    C
    3531.6
    [m]
    C
    3532.0
    [m]
    C
    3545.6
    [m]
    C
    3547.0
    [m]
    C
    3555.0
    [m]
    C
    3562.5
    [m]
    C
    3566.6
    [m]
    C
    3570.0
    [m]
    C
    3583.0
    [m]
    C
    3584.0
    [m]
    C
    3584.0
    [m]
    DC
    3588.0
    [m]
    C
    3591.0
    [m]
    C
    3593.0
    [m]
    C
    3594.0
    [m]
    C
    3599.0
    [m]
    SWC
    3599.0
    [m]
    SWC
    3603.0
    [m]
    SWC
    3606.0
    [m]
    SWC
    3614.0
    [m]
    DC
    3644.0
    [m]
    DC
    3653.0
    [m]
    SWC
    3674.0
    [m]
    DC
    3685.0
    [m]
    SWC
    3698.0
    [m]
    SWC
    3701.0
    [m]
    DC
    3703.0
    [m]
    SWC