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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6406/12-5 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.
    6406/12-5 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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    6406/12-5
    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.
    1599-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.
    52
    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,
    22.09.2015
    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.
    12.11.2015
    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.
    12.11.2017
    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.
    08.03.2018
    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.
    DRY
    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.
    24.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    336.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4297.0
    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).
    3734.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    43.6
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    130
    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° 3' 37.84'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    6° 50' 38.82'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7105712.87
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    394789.14
    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.
    7787

  • Wellbore history
    General
    Well 6406/12-5 S was drilled to test the central part of the Boomerang prospect on the Halten Terrace in the Norwegian Sea. The primary objective was to establish the presence and volume of moveable hydrocarbons in Intra Spekk and Melk formation sandstones
    Operations and results
    Wildcat well 6406/12-5 S was spudded with the semi-submersible installation Transocean Arctic on 22 September 2015 and drilled to TD at 4297 m (3734 m TVD) m in the Late Jurassic Melke Formation. After drilling top hole to 433 m a 9 7/8" pilot hole was drilled to 1134 m to investigate possible shallow gas intervals in the Nordland Group. No shallow gas or over-pressured water bearing zones were observed. In the 8 ½” section the string got stuck at 4107 m and after pulling free it was discovered that most of the bit body was lost in hole. Consequently, the hole was side-tracked from 3937 m and drilled without further significant problems to TD at 4297 m (3734 m TVD) in the Late Jurassic Melke Formation. The well was drilled with seawater and hi-vis pills down to 1225 m and with XP-07 oil-based mud from 1225 m to TD.
    Top Spekk Formation was reached at 3741 m (3192.3 m TVD) and consisted of laminated mudstone overlying a thin sandstone with moderate reservoir quality resting on a 140 m thick unit of mainly silty to fine-grained sandstones with a shaly upper part. Top of the Melke Formation was reached at 3920.5 m (3347.8 m TVD) and is followed by 218 m TVD of intra Melke sandstones of moderate quality with top at 3962 m (3384.3 m TVD). Petrophysical interpretation showed that reservoir porosities in the intra Spekk and Melke sandstones were good ranging from 8 to 20 % with permeabilities of up to 1200 mD based on sidewall core analyses. The pressure data indicate communication across the Spekk and Melke Formations reservoirs with a near hydrostatic gradient. The only oil shows observed during drilling was cut fluorescence and residual fluorescent ring on cuttings in the interval 3966 to 3978 m in the uppermost part of the Intra-Melke sandstone.
    No cores were cut. An MDT water sample was taken at 3965.5 m.
    The well was permanently abandoned on 12 November 2017 as a dry well.
    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]
    1230.00
    4108.00

  • Oil samples at the Norwegian Offshore Directorate
    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    MDT
    0.00
    0.00
    YES
    MDT
    0.00
    0.00
    BASE OIL
    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
    428.0
    36
    432.5
    0.00
    PILOT HOLE
    1134.0
    9 7/8
    1134.0
    0.00
    SURF.COND.
    20
    1219.0
    26
    1225.0
    0.00
    1228.0
    1228.0
    1.64
    FIT
    INTERM.
    13 3/8
    2256.0
    17 1/2
    2264.0
    0.00
    2267.0
    2267.0
    1.87
    FIT
    INTERM.
    9 5/8
    3617.0
    12 1/4
    3625.0
    0.00
    3628.0
    3628.0
    1.91
    LOT
    OPEN HOLE
    4297.0
    8 1/2
    4297.0
    0.00

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    GR RES ECD DIR
    360
    432
    LWD - ATBRES NBINC NBGR ECD MPR
    4090
    4108
    LWD - ATBRES NBINC NBGR TT ECD M
    3625
    4090
    LWD - ATK ZTKR ZTKG COP OTKII SD
    2264
    3625
    LWD - GR RES PWD DIR
    360
    1225
    LWD - GR RES PWD SON DIR
    1225
    2264
    T2 GR DSL CN ZDL
    3616
    4296
    T2 GR GX PL ORIT UXPL
    3616
    4288
    T2 GR XMAC HDIL ORIT
    360
    4294
    T2 LWD - NGRES NBGR ECD MPR DEN
    3937
    4297
    T2 PCOR SWC
    3745
    4287
    T2 PCX PRES SAMP
    3745
    4275
    T2 VSP BHS
    927
    4287

  • Lithostratigraphy

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    432
    1.34
    21.0
    KCL/POLYMER/GEM
    600
    1.01
    40.0
    Sweeps
    1100
    1.34
    21.0
    KCL/POLYMER/GEM
    1225
    1.49
    32.0
    XP-07 low ECD
    1225
    1.34
    21.0
    KCL/POLYMER/GEM
    1680
    1.51
    33.0
    XP-07 low ECD
    1924
    1.54
    34.0
    XP-07 low ECD
    2430
    1.54
    45.0
    XP-07 low ECD
    3031
    1.54
    38.0
    XP-07 low ECD
    3625
    1.54
    32.0
    XP-07 low ECD
    4005
    1.54
    37.0
    XP-07 low ECD
    4297
    1.54
    41.0
    XP-07 low ECD