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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34/6-3 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.
    34/6-3 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).
    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
    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.
    NORTH 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.
    34/6-3
    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.
    Total E&P 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.
    1521-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.
    118
    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,
    30.05.2014
    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.
    24.09.2014
    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.
    24.09.2016
    Plugged date
    Date when plugging operations was finished, as reported by the operator to the Norwegian Offshore Directorate through DDRS (Daily Drilling Reporting System).
    24.09.2014
    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.
    25.09.2016
    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.
    APPRAISAL
    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
    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.
    EARLY 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.
    COOK 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.
    380.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4462.0
    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).
    3816.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    66.6
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    142
    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 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.
    STATFJORD GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 34' 29.55'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 43' 48.69'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6827015.07
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    485670.96
    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.
    7468

  • Wellbore history
    General
    Wellbore 34/6-3 S was drilled to appraise the 34/6-2 S Garantiana discovery in the Visund area in the North Sea. The Primary  objective was to  prove  hydrocarbon  presence,  determine  fluid nature  and  evaluate  reservoir  characteristics  in the  Early Jurassic Cook Formation. The secondary objective was to prove petroleum in the Statfjord Group higher up on the structure than the 34/6-2 S well.
    Operations and results
    Garantiana appraisal well34/6-3 S was spudded with the semi-submersible installation Leiv Eiriksson on 30 May 2014 and drilled to 4462 m (3816 m TVD) in the Early Jurassic Statfjord Group. The well was drilled vertical down to ca 2500 m and deviated with a sail angle of ca 48 ° from there to TD. While  RIH  with  cement stinger  for  plugging  back the  Statfjord  reservoir  prior  to  testing  the  Cook  reservoir, severe losses leading to formation supercharging was observed. It resulted in ballooning effect. Several bleed off sequences was required to assess and regain normal situation. The well was drilled with seawater and hi-vis sweeps down to 1500 m, with Sildril Sodium Silicate WBM from 1500 m to 2058 m, with EMS-4600 NABM OBM from 2058 m to 3704 m, and with WARP-NABM mud from 3704 m to TD.
    Top Cook Formation was penetrated at 3850 m (3493 m TVD) and was oil filled all through (oil-down-to) to top Burton Formation at 4000 m (3593 m TVD). The NTG of the Cook formation was proven to be 86 %, with average effective porosity of 22 % and water saturation of 17.5 %.  Formation pressure data and the PVT analysis of the acquired DST samples indicate that the formation fluid in the Cook reservoir of 34/6-3S is the same as the fluid encountered in the 34/6-2S exploration well. The Statfjord Group proved to be water bearing with a NTG of 45.7%, effective average porosity of 12.4% and water saturation of 98.4%. Oil shows were described only within the Cook Formation.
    A total of 77 metres of core was cut and 75.5 metres recovered (98.0% recovery) in two cores from the interval 3918 to 3995 m in the Cook Formation. No wire line fluid sample was taken.
    The wellbore was plugged back for sidetracking and abandoned on 24 September 2014. It is classified as an oil appraisal well.
    Testing
    A well test was performed within the Cook reservoir from 3911 to 3998 m (3533 to 3591 m TVD). The test produced 945 Sm3 oil and 16731 Sm3 gas through a 24/64" choke in the second main flow. The separator GOR was 42 Sm3/Sm3, the stock tank oil density was 0.8784 g/cm3 and the gas gravity was 0.927. The flowing bottom hole temperature was 132.2 °C.

  • 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]
    1500.00
    4460.00

  • 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
    3918.0
    3959.9
    [m ]
    2
    3959.9
    3993.5
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    75.5
    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
    472.0
    36
    472.5
    0.00
    SURF.COND.
    20
    1494.0
    26
    1500.0
    1.40
    FIT
    INTERM.
    13 3/8
    2049.0
    17 1/2
    2058.0
    1.63
    LOT
    INTERM.
    9 7/8
    3697.0
    12 1/4
    3704.0
    1.66
    FIT
    LINER
    7
    4249.0
    8 1/2
    4462.0
    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
    3911
    3998
    9.5
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    132
    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
    950
    16731
    0.820
    0.927
    42

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    APS TLD HNGS AITC
    3630
    3729
    CMR GR
    3697
    3701
    GR RES SON DI
    2070
    2086
    LWD - DI GR RES APWD
    472
    1500
    LWD - GR DI APWD RES GR SON
    3995
    4662
    LWD - GR DI APWD RES NEU DEN FTW
    3753
    4116
    LWD - GR DI APWD RES NEU DEN JPG
    1
    1000
    LWD - GR RES SON DI APWD
    0
    0
    LWD - GR RES SON DI APWD
    1500
    3704
    LWD - GR RES SON DI APWD
    2053
    2105
    LWD - RES DI GR APWD SON
    3704
    3918
    OBMI PPC MSIP PPC GR
    3200
    4153
    USIT CBL VDL GR
    3090
    3692
    USIT CBL VDL GR
    3580
    4163

  • Lithostratigraphy

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    421
    1.03
    Sea water
    473
    1.35
    Spud mud
    734
    1.03
    Sea water
    2061
    1.62
    32.0
    NABM
    2112
    1.65
    51.0
    NABM
    3709
    1.84
    47.0
    NABM
    4251
    1.82
    41.0
    NABM
    4462
    1.84
    48.0
    NABM