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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6507/4-1

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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.
    6507/4-1
    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
    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.
    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.
    6507/4-1
    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.
    ConocoPhillips Skandinavia 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.
    1829-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.
    91
    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,
    12.08.2020
    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.
    10.11.2020
    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.
    10.11.2022
    Plugged and abondon date
    Date when the P&A-operations of the wellbore was finished, as reported by the operator to the Norwegian Offshore Directorate throught DDRS (Daily Drilling Reporting System). Only applied once pr. wellhead/surface location.
    10.11.2020
    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.
    10.11.2022
    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
    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 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.
    LANGE 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.
    400.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4985.0
    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).
    4985.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.3
    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 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.
    LYR FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    65° 38' 14.32'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 1' 18.48'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7281100.23
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    408950.31
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    32
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    9110

  • Wellbore history
    General
    Well 6507/4-1 was drilled to test the Warka prospect on the Dønna Terrace in the Norwegian Sea. The primary objective was to prove reservoir presence, quality, and age (Late Albian - early Cenomanian age) of Intra Lange sandstones, and prove presence, saturation, and quality of hydrocarbons in the reservoir. A secondary objective was to test a possible deeper sand of Aptian age, the Warszawa lead.
    Operations and results
    Wildcat well 6507/4-1 was spudded with the semi-submersible installation Leiv Eiriksson on 12 August 2020 and drilled to TD at 4985 m in the Early Cretaceous Lange Formation. Operations on this deep well proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 817 m, with KCl mud from 817 to 1420 m, with Innovert NS oil-based mud from 1420 to 2606.5 m, with BaraECD 3.2 oil-based mud from 2606 to TD.
    Three main Cretaceous sandstone sections were penetrated by the well: the Lysing Formation from 3037 to 3109 m, a K54 section from 3915 to 3971 m, and the target Late Albian Warka sandstone from 4608 to 4650 m. No Warszawa sandstones were present in the Aptian. The Warka sandstones were gas-condensate bearing with close to 39 m pay in both well tracks, the other sandstones were water bearing.
    The cored Warka sandstone in the side-track had weak shows consistent with a lean gas-condensate: slow diffuse moderate yellowish to bluish white cut fluorescence, 30% weak bluish white fluorescent residue. Otherwise, there were no shows above OBM in the well.
    A bypass coring side-track was made to core the Warka sandstones. This side-track, 6507/4-1 T2, was kicked off at 4386 m and TD'd at 4708 m. Five cores were cut in succession from 4546 to 4660.25 m. In total 111 meter core (97.3%) was recovered. Reservoir fluid samples were collected from the Lange K48 Warka sands with MDT in the main wellbore
    6507/4-1 and with ORA in side-track wellbore 6507/4-1 T2. Samples were taken at 4631.09 m in the main bore and at 4631.22 m in the side-track. All samples contained gas-condensate.
    The well was permanently abandoned on 10 November 2020 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]
    830.00
    4985.00

  • 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
    4546.0
    4570.7
    [m ]
    2
    4571.2
    4594.5
    [m ]
    3
    4594.5
    4612.1
    [m ]
    4
    4614.5
    4632.4
    [m ]
    5
    4632.5
    4660.3
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    111.2
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • 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
    490.5
    36
    493.0
    0.00
    INTERM.
    20
    812.0
    26
    817.0
    1.43
    LOT
    LINER
    17
    1410.0
    17 1/2
    1420.0
    1.72
    LOT
    INTERM.
    13 3/8
    2599.0
    16
    2605.0
    1.82
    LOT
    INTERM.
    9 7/8
    4375.0
    12 1/4
    4405.0
    2.12
    LOT
    OPEN HOLE
    4708.0
    8 1/2
    4708.0
    0.00
    OPEN HOLE
    4985.0
    8 1/2
    4985.0
    0.00

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    HXPT CMR LEHF
    4380
    4695
    LWD - OT
    425
    817
    LWD - OT
    1420
    4717
    LWD - OT
    4520
    4700
    LWD - OT ST
    493
    1420
    LWD - OT TT ST
    4717
    4985
    MDT
    4600
    4649
    ORA
    4611
    4647
    QAIT HASPS NEXT HL DS HNGS NGI G
    4375
    4711
    QAIT MSIP HAPS HLDS HNGS LEHF
    4250
    4705
    QAIT MSIP HAPS HLDS HNGS LEHF
    4375
    4985
    QAIT SSC HAPS HLDS HNGS GR
    2570
    4380
    VSI
    4055
    4970

  • Lithostratigraphy

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    518
    1.03
    10.0
    0.4
    Water Base
    550
    1.50
    21.0
    4.3
    Oil Base
    817
    1.25
    16.7
    Water Base
    1420
    1.26
    17.0
    11.4
    Water Base
    1475
    1.46
    29.0
    4.7
    Oil Base
    1958
    1.55
    39.0
    9.0
    Oil Base
    2135
    1.50
    21.0
    2.8
    Oil Base
    2263
    1.72
    41.0
    5.7
    Oil Base
    2552
    1.74
    5.7
    Oil Base
    2605
    1.57
    30.0
    7.1
    Oil Base
    3302
    1.64
    24.0
    4.7
    Oil Base
    3870
    1.43
    29.0
    6.2
    Oil Base
    4116
    1.72
    33.0
    6.2
    Oil Base
    4200
    1.84
    42.9
    5.7
    Oil Base
    4296
    1.72
    30.0
    4.7
    Oil Base
    4717
    1.82
    39.0
    5.2
    Oil Base
    4794
    1.83
    34.0
    3.7
    Oil Base
    4886
    1.86
    39.0
    3.7
    Oil Base
    4985
    1.87
    36.0
    5.2
    Oil Base