Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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25.11.2024 - 01:30
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6406/12-3 S

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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.
    6406/12-3 S
    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
    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.
    6406/12-3
    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.
    VNG 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.
    1500-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.
    93
    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,
    21.01.2014
    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.
    26.04.2014
    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.
    26.04.2016
    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.
    26.04.2016
    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.
    OIL/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 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.
    INTRA MELKE FM SS
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    24.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    324.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4001.0
    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).
    3762.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    33
    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 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.
    MELKE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    64° 1' 52.32'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    6° 45' 17.58'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7102598.45
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    390320.66
    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.
    7322

  • Wellbore history
    General
    The 6406/12-3 S, 6406/12-3 A, and 6406/12-3 B wellbores were drilled in concert on the Pil and Bue prospects in the southern end of the Halten Terrace in the Norwegian Sea. The 6406/12-3 S was the first well to be drilled. It was designed to test a seismic data anomaly and a flat spot recognised in the Pil prospect, at Late Jurassic level.
    Operations and results
    Wildcat well 6406/12-3 S was spudded with the semi-submersible installation Transocean Arctic on 21 January 2014 and drilled to TD at 4001 m (3762 m TVD) in the Late Jurassic Melke Formation. A 9 7/8" pilot hole was drilled from 418 to 1246 to check for shallow gas. No shallow gas was seen. Due to deteriorating hole conditions in the 8 1/2" section it was decided to set 7" liner early, at 3839 m, and continue the well as an unplanned 6" hole to TD.  Otherwise, no significant problem was encountered in the operations. The well was drilled with seawater and sweeps down to 1246 m and with XP-07 oil based mud from 1246 m to TD.
    Contrary to prognosis, there were no Rogn Formation sandstones in the well. Instead, the well encountered Intra Melke Formation sandstones at 3514 m (3276.5 m TVD). These sandstones had good to excellent reservoir quality and contained a 227 m TVD gross hydrocarbon column. The hydrocarbons in the reservoir zone consisted of a 93 TVD m thick gas cap overlying a 134 TVD m oil leg in. The GOC is located at 3608 m (3370 m TVD) and the OWC at 3742 m (3504 m TVD). Pressure data indicated a single gas gradient over an oil leg. Below the OWC, the well penetrated a further thick high net to gross reservoir package of Intra Melke sandstones with a continuous water gradient.
    Five 54 m consecutive cores were cut in the interval 3524 to 3732 m with 100% overall recovery. RCX fluid samples were taken at 3579.1 m (gas), 3620.3 m (oil), 3641.7 m (oil) and 3758.5 m (water).
    The well was permanently abandoned on 26 April 2014 as an oil and gas discovery.
    Testing
    One Drill Stem Test was conducted from perforations in the interval 3637.3 to 3724.5 m. The test produced oil at a rate of 1017 Sm3/day through a 56/64" choke. The GOR was 160 Sm3/Sm3 and the measured oil density was 0.850g/cm3 (36 °API).

  • 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]
    1250.00
    3999.00

  • 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
    3524.0
    3578.2
    [m ]
    2
    3578.0
    3632.3
    [m ]
    3
    3632.3
    3669.3
    [m ]
    4
    3669.3
    3724.3
    [m ]
    5
    3724.3
    3733.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    209.7
    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
    414.7
    36
    418.0
    0.00
    SURF.COND.
    20
    1238.6
    26
    1246.0
    1.70
    FIT
    INTERM.
    13 3/8
    2265.2
    17 1/2
    2271.0
    1.87
    FIT
    PROD.
    9 5/8
    3442.4
    12 1/4
    3450.0
    1.98
    LOT
    LINER
    7
    3838.0
    8 1/2
    3839.0
    0.00
    OPEN HOLE
    4001.0
    6
    4001.0
    0.00

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    3637
    3725
    22.2
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    Drill stem tests (DST)
    Test number
    Oil
    [Sm3/day]
    Gas
    [Sm3/day]
    Oil density
    [g/cm3]
    Gas grav. rel.air
    GOR
    [m3/m3]
    1.0
    1017
    0.845
    160

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    LWD - GR RES DEN PWD DIR NPOR SO
    3450
    3839
    LWD - GR RES PWD DEN POR SON
    2260
    3450
    LWD - GR RES PWD DIR
    1
    418
    LWD - GR RES PWD DIR TT
    3839
    4001
    MREX
    3500
    3820
    MREX
    3838
    3965
    PS
    3517
    3777
    PS
    3841
    3900
    SBT
    3296
    3425
    SLAM
    348
    3820
    SLAM
    3838
    3900
    SWC
    3486
    3507
    VSP
    1155
    3990

  • Lithostratigraphy

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    418
    1.34
    14.0
    KCL Polymer displacement mud
    454
    1.05
    18.0
    High Viscosity Bentonite Mud
    460
    1.34
    14.0
    KCL Polymer displacement mud
    484
    1.05
    18.0
    High Viscosity Bentonite Mud
    916
    1.34
    14.0
    KCL Polymer displacement mud
    964
    1.05
    18.0
    High Viscosity Bentonite Mud
    980
    1.34
    14.0
    KCL Polymer displacement mud
    985
    1.63
    53.0
    Yellow XP-07
    1050
    1.05
    18.0
    High Viscosity Bentonite Mud
    1180
    1.49
    30.0
    Yellow XP-07
    1246
    1.46
    29.0
    YELLOW XP-07 LOW ECD
    1246
    1.02
    KCL Polymer displacement mud
    1246
    1.46
    29.0
    YELLOW XP-07 LOW ECD
    1252
    1.49
    18.0
    Yellow XP-07
    1280
    1.63
    53.0
    Yellow XP-07
    2195
    1.61
    40.0
    YELLOW XP-07 LOW ECD
    2379
    1.61
    42.0
    XP O71.62
    3176
    1.65
    39.0
    Yellow XP-07
    3233
    1.65
    40.0
    YELLOW XP-07 LOW ECD
    3450
    1.73
    45.0
    XP O7
    3450
    1.65
    36.0
    YELLOW XP-07 LOW ECD
    3506
    1.73
    41.0
    YELLOW XP-07 LOW ECD
    3632
    1.73
    40.0
    XP O7
    3738
    1.65
    36.0
    Yellow XP-07
    3738
    1.34
    CaBr Brine
    3765
    1.73
    41.0
    XP-07
    3839
    1.61
    27.0
    YELLOW XP-07 LOW ECD
    3839
    1.73
    41.0
    YELLOW XP-07 LOW ECD
    4001
    1.61
    30.0
    Yellow XP-07