Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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25.04.2024 - 01:33
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6604/5-1

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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.
    6604/5-1
    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
    Press release
    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.
    NORWEGIAN SEA
    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.
    6604/5-1
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    BG0904R11. Inline 1470. Xline 2752
    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.
    Wintershall Norge 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.
    1680-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.
    65
    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,
    10.01.2018
    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.
    22.03.2018
    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.
    22.03.2020
    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.
    22.03.2020
    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.
    GAS
    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.
    LATE CRETACEOUS
    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.
    SPRINGAR FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    39.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    1219.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3858.0
    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).
    3858.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    132
    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 CRETACEOUS
    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.
    SPRINGAR FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    66° 35' 37.43'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    4° 32' 56.55'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7387131.89
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    568665.16
    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.
    8318
  • Wellbore history

    General
    Well 6604/5-1 was drilled to test the Balderbrå prospect in the Vøring Basin of the Norwegian Sea. The primary objective was to prove reservoir presence and hydrocarbon accumulations in Springar Sandstone intervals. TD was planned to be 150 m below the base of the deepest Springar Sandstone. In case of a discovery a technical side-track was planned to obtain cores from the reservoir.
    Operations and results
    A pilot hole 6604/5-U-1 was drilled 50 m away from the mainbore location in a 12 1/4" hole in order to identify the correct setting depth for the 20" x 13-3/8" casing below the ooze.
    Wildcat well 6604/5-1 was spudded with the semi-submersible installation West Phoenix on 10 January 2018 and drilled to TD at 3858 m in the Late Cretaceous Springar Formation. Gas was discovered, and the well was side-tracked at 3308 m to obtain cores from the hydrocarbn-bearing sandstones. The side-track reached TD at 3760 m in the Late Cretaceous Springar Formation. During P&A in the mainbore a leak in the slip joint between the gator lock and inner barrel was discovered. This led to a 10 days repair period before normal operations were resumed. The well was drilled with seawater and hi-vis pills down to 2375 m and with Innovert oil-based mud from 2382 m to TD. Innovert OBM was used also in the side-track.
    Three Springar was encountered at 3259 m. Intra-Springar sands were penetrated with tops in the mainbore at 3336 m, 3453 m, and 3582.5 m. In the side-track the sands were penetrated 1 – 2 m MD deeper. All three sands were gas filled with gas-down to contacts. Pressure measurements showed that the three sandstones have different pressure regimes. Weak, light-coloured shows were described in the two upper Springar sandstones, otherwise no oil shows were recorded in the well.
    Two cores were cut in the two lower and thickest Springar sandstones in the side-track. Core one was cut from 3450 to 3504 m with 101% recovery. The core-log depth shift for this core is 2.42 m. Core two was cut from 3579 to 3634 m with 102% recovery. The core-log depth shift for this core is 3.90 m. MDT gas samples were taken at 3339.7 m, 3457.7 m, and 3592.7 m.
    The well was permanently abandoned on 22 March 2018 as a gas discovery.
    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]
    2390.00
    3857.65
  • 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
    3450.0
    3504.7
    [m ]
    2
    3579.0
    3634.1
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    109.8
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Lithostratigraphy

    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    1258
    1258
    1504
    1730
    1730
    2513
    2513
    2594
    3259
    3259
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    LWD - DIR
    1258
    1348
    LWD - DIR GR RES PWD
    1348
    2382
    LWD - DIR GR RES PWD SON DEN
    2382
    3220
    LWD - DIR GR RES PWD SON DEN POR
    3220
    3858
    MDT GR SATURN
    1257
    3858
    T2-CMR NEXT HNGS
    3219
    3760
    T2-LWD - DIR
    1258
    1348
    T2-LWD - DIR GR RES PWD
    1348
    2382
    T2-LWD - DIR GR RES PWD
    3308
    3760
    T2-LWD - DIR GR RES PWD SO DE PO
    3220
    3858
    T2-LWD - DIR GR RES PWD SON DEN
    2382
    3220
    T2-MDT
    3340
    3710
    T2-QGEO MSIP
    3219
    3760
    T2-ZAIT ADT PEX HNGS
    3219
    3760
    T2-ZVSP
    1200
    3760
  • 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
    1344.0
    42
    1348.0
    0.00
    INTERM.
    13 3/8
    2376.0
    17 1/2
    2382.0
    1.34
    LOT
    INTERM.
    9 5/8
    3219.0
    12 1/4
    3220.0
    1.45
    LOT
    OPEN HOLE
    3858.0
    8 1/2
    3858.0
    0.00
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1348
    1.03
    Water
    1348
    1.30
    Water
    1450
    1.05
    Water
    2100
    1.04
    Water
    2100
    1.04
    Oil
    2342
    1.05
    Water
    2382
    1.12
    Water
    2382
    1.30
    Water
    2561
    1.14
    Oil
    3070
    1.25
    Oil
    3157
    1.15
    Oil
    3202
    1.25
    Oil
    3221
    1.25
    Oil
    3221
    1.15
    Oil
    3504
    1.25
    Oil
    3858
    1.25
    Oil