Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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21.11.2024 - 01:28
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2/6-2

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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.
    2/6-2
    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
    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.
    NORTH SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    2/6-2
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    686 201 SP.348
    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.
    Elf Petroleum 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.
    238-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.
    144
    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,
    03.01.1980
    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.
    25.05.1980
    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.
    25.05.1982
    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.
    27.05.2009
    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.
    OIL SHOWS
    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.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    70.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4760.0
    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).
    4760.0
    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 PERMIAN
    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.
    ZECHSTEIN GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 30' 48.9'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 42' 39.66'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6263608.18
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    543756.41
    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.
    224

  • Wellbore history
    General
    Well 2/6-2 is located on the Piggvar Terrace just east of the Mandal High in the southern Norwegian North Sea. The main objective of the 2/6-2 well was to test a possible hydrocarbon accumulation of a lens-shaped seismic anomaly in the Lower Cretaceous. The anomaly showed both up dip truncation and structural closure, it was believed to represent a deep sea fan type sand deposit. A secondary objective was to explore the upper part of the Jurassic series below the Kimmeridgian unconformity.
    The well is Reference well for the Tuxen Formation.
    Operations and results
    Wildcat well 2/6-2 was spudded with the semi-submersible installation Dyvi Alpha on 3 January 1980 and drilled to TD at 4760 m in Permian Zechstein salt. The hole was side-tracked from 4175 m due to loss of MFT tool in the hole at 4276 m.
    In the Early Cretaceous only tight, mainly water bearing limestones were found. The Jurassic consisted of the Mandal, Farsund, Haugesund, and the Bryne Formations, with the latter resting directly on the salt at 4723 m. In the Late Jurassic a hydrocarbon bearing but tight limestone body was unexpectedly found. The Middle Jurassic Bryne sandstones were found gas bearing. Shows were reported as follows: Down to the top of the Jurassic at 4118 m only minor amounts of gas were recorded and the first occurrence of C2 was seen at 4100 m. Fluorescence of a yellow golden colour and greenish white cut was seen on Early Cretaceous limestones from 3870 to 3877 m, this led to the cutting of Core 1 at 3877 to 3886 m. On the core no direct fluorescence was seen, only a weak, cloudy yellow/greenish cut which terminated at 3881 m. Direct fluorescence and cut was seen on Late Jurassic limestones between 4179 and 4230 m, further, on Cores 2 and 3 taken from 4220 to 4235.5 m there was seen good yellow to bluish direct fluorescence. Some bubbling of gas was also seen and seepage of oil from shaly joints. Some cut was seen on siltstone at 4400 m and oil appeared in the mud down to 4465 m.
    No wire line pressure measurements or fluid samples were taken.
    The well was permanently abandoned on 25 May 1980 as a minor 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]
    180.00
    4760.00

  • 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
    3877.0
    3886.1
    [m ]
    2
    4220.0
    4228.6
    [m ]
    3
    4229.0
    4235.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    23.7
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 3877-3880m
    Core photo at depth: 3880-3883m
    Core photo at depth: 3883-3886m
    Core photo at depth: 4220-4223m
    Core photo at depth: 4223-4226m
    3877-3880m
    3880-3883m
    3883-3886m
    4220-4223m
    4223-4226m
    Core photo at depth: 4226-4228m
    Core photo at depth: 4230-4232m
    Core photo at depth: 4232-4235m
    Core photo at depth:  
    Core photo at depth:  
    4226-4228m
    4230-4232m
    4232-4235m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    200.0
    [m]
    DC
    HRS
    300.0
    [m]
    DC
    HRS
    400.0
    [m]
    DC
    HRS
    500.0
    [m]
    DC
    HRS
    600.0
    [m]
    DC
    HRS
    700.0
    [m]
    DC
    HRS
    800.0
    [m]
    DC
    HRS
    900.0
    [m]
    DC
    HRS
    1000.0
    [m]
    DC
    HRS
    1100.0
    [m]
    DC
    HRS
    1200.0
    [m]
    DC
    HRS
    1300.0
    [m]
    DC
    HRS
    1400.0
    [m]
    DC
    HRS
    1500.0
    [m]
    DC
    HRS
    1600.0
    [m]
    DC
    HRS
    1700.0
    [m]
    DC
    HRS
    1800.0
    [m]
    DC
    HRS
    1900.0
    [m]
    DC
    HRS
    2000.0
    [m]
    DC
    HRS
    2100.0
    [m]
    DC
    HRS
    2200.0
    [m]
    DC
    HRS
    2300.0
    [m]
    DC
    HRS
    2400.0
    [m]
    DC
    HRS
    2500.0
    [m]
    DC
    HRS
    2600.0
    [m]
    DC
    HRS
    2700.0
    [m]
    DC
    HRS
    2800.0
    [m]
    DC
    HRS
    2900.0
    [m]
    DC
    HRS
    3000.0
    [m]
    DC
    HRS
    3100.0
    [m]
    DC
    HRS
    3150.0
    [m]
    DC
    HRS
    3900.0
    [m]
    DC
    HRS
    3980.0
    [m]
    DC
    HRS
    4120.0
    [m]
    DC
    HRS
    4130.0
    [m]
    DC
    HRS
    4140.0
    [m]
    DC
    HRS
    4160.0
    [m]
    DC
    HRS
    4190.0
    [m]
    DC
    HRS
    4220.0
    [m]
    DC
    HRS
    4224.4
    [m]
    C
    HRS
    4233.4
    [m]
    C
    HRS
    4250.0
    [m]
    DC
    HRS
    4280.0
    [m]
    DC
    HRS
    4310.0
    [m]
    DC
    HRS
    4320.0
    [m]
    DC
    HRS
    4370.0
    [m]
    DC
    HRS
    4398.0
    [m]
    DC
    HRS
    4426.0
    [m]
    DC
    HRS
    4440.0
    [m]
    DC
    HRS
    4460.0
    [m]
    DC
    HRS
    4498.0
    [m]
    DC
    HRS
    4516.0
    [m]
    DC
    HRS
    4536.0
    [m]
    DC
    HRS
    4554.0
    [m]
    DC
    HRS
    4575.0
    [m]
    DC
    HRS
    4598.0
    [m]
    DC
    HRS
    4616.0
    [m]
    DC
    HRS
    4636.0
    [m]
    DC
    HRS
    4656.0
    [m]
    DC
    HRS
    4678.0
    [m]
    DC
    HRS
    4696.0
    [m]
    DC
    HRS

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    1.09

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    12.01
    pdf
    10.01
    pdf
    0.25
    pdf
    12.47
    pdf
    0.38

  • Documents – reported by the production licence (period for duty of secrecy expired)
    Documents – reported by the production licence (period for duty of secrecy expired)
    Document name
    Document format
    Document size [MB]
    pdf
    3.01
    pdf
    7.85

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC
    3200
    3768
    BHC GR
    3000
    3677
    CDL CNL GR
    150
    4748
    DLL
    4330
    4753
    HDT
    2463
    4757
    IEL BHC GR
    102
    4758
    VELOCITY
    700
    4710

  • 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
    130.0
    36
    133.0
    0.00
    LOT
    SURF.COND.
    20
    680.0
    26
    695.0
    1.56
    LOT
    INTERM.
    13 3/8
    2449.0
    17 1/2
    2461.0
    1.71
    LOT
    INTERM.
    9 5/8
    3820.0
    12 1/4
    3831.0
    1.98
    LOT
    LINER
    7
    4325.0
    8 1/2
    4332.0
    2.18
    LOT
    OPEN HOLE
    4735.0
    5 7/8
    4735.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    148
    1.10
    65.0
    waterbased
    703
    1.15
    50.0
    waterbased
    1218
    1.22
    55.0
    waterbased
    1693
    1.26
    58.0
    waterbased
    2084
    1.35
    80.0
    waterbased
    2850
    1.47
    66.0
    waterbased
    3912
    1.62
    54.0
    waterbased
    4275
    1.74
    65.0
    waterbased
    4440
    1.90
    67.0
    waterbased

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    4221.00
    [m ]
    4226.00
    [m ]