Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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sodir.no          Norsk
31.10.2024 - 01:27
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24/12-2

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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.
    24/12-2
    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
    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
    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.
    24/12-2
    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.
    Den norske stats oljeselskap a.s
    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.
    294-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.
    213
    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,
    23.06.1981
    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.
    21.01.1982
    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.
    21.01.1984
    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.
    01.12.2004
    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.
    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.
    32.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    119.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    5100.0
    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).
    5091.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    11.3
    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.
    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.
    HEATHER FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    59° 12' 0.75'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 52' 53.34'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6563033.08
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    436110.82
    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.
    348

  • Wellbore history
    General
    Wildcat well 24/12-2 is located in the Vana Sub-basin in the Southern Viking Graben, about 11 km east of the border to British sector. The well was drilled on structure (Alpha) in the northeastern part of the block. Target was Late Jurassic sandstones.
    The well is Reference well for the Sola and Grid Formations
    Operations and results
    Well 24/12-2 was spudded with the semi-submersible installation Dyvi Delta on 23 June 1981 and drilled to TD at 5100 m in the Late Jurassic Heather Formation. Operations on both 36" and 26" sections went smooth. During drilling of the 17 1/2" section the drill pipe broke off at 2044 m. This was recovered and drilling continued to 2445 m. One stand was left in the hole at this depth and fishing was unsuccessful. Both fish and open hole were cemented up to 2160 and the well was sidetracked from 2220 m. After setting the 13 3/8" at 2886 m casing the Kelly bushing elevation was changed from 32 m to 30 m. The 8 1/2" hole was drilled to 4306 m when a 21-day strike occurred. The well was drilled with seawater and gel down to 1005 m, with gypsum / lime / polymer from 1005 m to 2866 m, and with a Spersene / XP-20 / Resinex mud from 2886 m to TD.
    Tertiary sandstones were encountered in the Grid Formation (1282 m to 1397 m), the Heimdal Formation (2202 m to 2407 m), and the Ty Formation (2567 m to 2617 m). The main target Late Jurassic sandstones were found (Intra Heather Sandstone Formation) in the intervals 4739 m to 4749 m and 4955 m to 4978 m. These sands had poor reservoir properties. Oil shows were recorded in the Heimdal Formation. Ca 380 m of Draupne Formation was penetrated by this well. The dark shales in this formation had TOC typically in the range 4 % to 7 %, but with relatively low Hydrogen Index (50 to 110 mg/g HC). The Kerogen in the shales appeared to be mostly type III with some Type II towards the top. Measured vitrinite reflectance varies somewhat between different laboratories, but maturity is advanced with %Ro in the range 0.9 (Geolab Nor 1990) to 1.0 - 1.3 (IKU 1982). Similar TOC levels as in Draupne were found all through the Heather shales down to TD, but the hydrogen index in Heather is even lower and the maturity higher. One core was taken in Intra Heather Formation Sandstone from 4960 m to 4978 m. An attempt was made to take two RFT samples, but this was not successful due to tight formation.
    The well was permanently abandoned on 23 June 1981 as a well with shows.
    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]
    210.00
    5100.00

  • 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
    4960.0
    4977.7
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    17.7
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 4960-4965m
    Core photo at depth: 4965-4970m
    Core photo at depth: 4970-4975m
    Core photo at depth: 4975-4977m
    Core photo at depth:  
    4960-4965m
    4965-4970m
    4970-4975m
    4975-4977m

  • 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
    199.5
    36
    202.5
    0.00
    LOT
    SURF.COND.
    20
    992.0
    26
    1005.0
    1.50
    LOT
    INTERM.
    13 3/8
    2873.0
    17 1/2
    2886.0
    1.79
    LOT
    INTERM.
    9 5/8
    3966.0
    12 1/4
    3980.0
    2.13
    LOT
    OPEN HOLE
    5100.0
    8 1/2
    5100.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL
    992
    2869
    CBL
    2869
    3966
    CONT.DIP
    3963
    5103
    CST 3RUN
    0
    0
    CYBERDIP
    3962
    5103
    DLL MSFL
    4900
    5025
    FDC CNL GR
    200
    5090
    ISF SONIC SP GR
    200
    5090
    RFT
    4956
    4971
    TEMP
    2200
    4780
    VELOCITY
    530
    5090

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.80

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    4.70
    pdf
    3.02

  • 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
    14.22

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    200
    1.02
    50.0
    water based
    450
    1.04
    48.0
    water based
    1020
    1.06
    40.0
    water based
    1870
    1.22
    45.0
    water based
    2365
    1.22
    41.0
    water based
    3000
    1.70
    46.0
    water based
    4145
    1.84
    64.0
    water based
    4255
    1.96
    66.0
    water based
    4400
    2.03
    74.0
    water based

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2210.0
    [m]
    DC
    STRATLAB
    2230.0
    [m]
    DC
    STRATLAB
    2250.0
    [m]
    DC
    STRATLAB
    2270.0
    [m]
    DC
    STRATLAB
    2290.0
    [m]
    DC
    STRATLAB
    2310.0
    [m]
    DC
    STRATLAB
    2330.0
    [m]
    DC
    STRATLAB
    2350.0
    [m]
    DC
    STRATLAB
    2370.0
    [m]
    DC
    STRATLAB
    2390.0
    [m]
    DC
    STRATLAB
    2410.0
    [m]
    DC
    STRATLAB
    2490.0
    [m]
    DC
    STRATLAB
    2510.0
    [m]
    DC
    STRATLAB
    2530.0
    [m]
    DC
    STRATLAB
    2550.0
    [m]
    DC
    STRATLAB
    2570.0
    [m]
    DC
    STRATLAB
    2590.0
    [m]
    DC
    STRATLAB
    2600.0
    [m]
    DC
    STRATLAB
    2615.0
    [m]
    DC
    STRATLAB
    4250.0
    [m]
    DC
    STRATLAB
    4257.0
    [m]
    SWC
    IKU
    4260.5
    [m]
    SWC
    IKU
    4262.0
    [m]
    SWC
    IKU
    4262.5
    [m]
    SWC
    IKU
    4264.0
    [m]
    SWC
    IKU
    4265.0
    [m]
    DC
    STRATLAB
    4274.7
    [m]
    SWC
    IKU
    4275.7
    [m]
    SWC
    IKU
    4280.0
    [m]
    SWC
    IKU
    4280.0
    [m]
    DC
    STRATLAB
    4282.0
    [m]
    SWC
    IKU
    4295.0
    [m]
    DC
    STRATLAB
    4310.0
    [m]
    DC
    STRATLAB
    4325.0
    [m]
    DC
    STRATLAB
    4340.0
    [m]
    DC
    4350.0
    [m]
    SWC
    IKU
    4355.0
    [m]
    DC
    STRATLAB
    4370.0
    [m]
    DC
    STRATLAB
    4385.0
    [m]
    DC
    STRATLAB
    4400.0
    [m]
    DC
    STRATLAB
    4400.0
    [m]
    SWC
    IKU
    4415.0
    [m]
    DC
    STRATLAB
    4430.0
    [m]
    DC
    STRATLAB
    4445.0
    [m]
    DC
    STRATLAB
    4460.0
    [m]
    DC
    STRATLAB
    4475.0
    [m]
    DC
    STRATLAB
    4476.0
    [m]
    SWC
    IKU
    4490.0
    [m]
    DC
    STRATLAB
    4500.0
    [m]
    SWC
    IKU
    4505.0
    [m]
    DC
    STRATLAB
    4524.0
    [m]
    SWC
    IKU
    4535.0
    [m]
    DC
    STRATLAB
    4550.0
    [m]
    DC
    STRATLAB
    4565.0
    [m]
    DC
    STRATLAB
    4580.0
    [m]
    DC
    STRATLAB
    4595.0
    [m]
    DC
    STRATLAB
    4597.5
    [m]
    SWC
    IKU
    4610.0
    [m]
    DC
    STRATLAB
    4625.0
    [m]
    DC
    STRATLAB
    4627.5
    [m]
    SWC
    IKU
    4640.0
    [m]
    DC
    STRATLAB
    4649.0
    [m]
    SWC
    IKU
    4655.0
    [m]
    DC
    STRATLAB
    4670.0
    [m]
    DC
    STRATLAB
    4673.5
    [m]
    SWC
    IKU
    4685.0
    [m]
    DC
    STRATLAB
    4700.0
    [m]
    DC
    STRATLAB
    4715.0
    [m]
    DC
    STRATLAB
    4715.5
    [m]
    SWC
    IKU
    4730.0
    [m]
    DC
    STRATLAB
    4744.0
    [m]
    SWC
    IKU
    4745.0
    [m]
    DC
    STRATLAB
    4757.0
    [m]
    SWC
    IKU
    4760.0
    [m]
    DC
    STRATLAB
    4775.0
    [m]
    DC
    STRATLAB
    4790.0
    [m]
    DC
    STRATLAB
    4799.0
    [m]
    SWC
    IKU
    4805.0
    [m]
    DC
    STRATLAB
    4820.0
    [m]
    DC
    STRATLAB
    4835.0
    [m]
    DC
    STRATLAB
    4850.0
    [m]
    DC
    STRATLAB
    4850.5
    [m]
    SWC
    IKU
    4865.0
    [m]
    DC
    STRATLAB
    4880.0
    [m]
    DC
    STRATLAB
    4895.0
    [m]
    DC
    STRATLAB
    4898.5
    [m]
    SWC
    IKU
    4910.0
    [m]
    DC
    STRATLAB
    4925.0
    [m]
    DC
    STRATLAB
    4930.0
    [m]
    SWC
    IKU
    4940.0
    [m]
    DC
    STRATLAB
    4955.0
    [m]
    DC
    STRATLAB
    4958.5
    [m]
    SWC
    IKU
    4960.0
    [m]
    DC
    STRATLAB
    4962.8
    [m]
    C
    IKU
    4964.5
    [m]
    C
    4965.0
    [m]
    DC
    STRATLAB
    4968.1
    [m]
    C
    IKU
    4970.0
    [m]
    DC
    STRATLAB
    4970.0
    [m]
    C
    STRATLAB
    4974.5
    [m]
    C
    4975.0
    [m]
    DC
    STRATLAB
    4977.5
    [m]
    C
    4977.6
    [m]
    C
    IKU
    4985.0
    [m]
    DC
    4990.0
    [m]
    SWC
    IKU
    5000.0
    [m]
    DC
    5015.0
    [m]
    DC
    5030.0
    [m]
    DC
    5044.0
    [m]
    SWC
    IKU
    5045.0
    [m]
    DC
    5060.0
    [m]
    DC
    5075.0
    [m]
    DC
    5090.0
    [m]
    DC
    5100.0
    [m]
    DC
    5100.0
    [m]
    SWC
    IKU

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    4960.76
    [m ]
    4962.50
    [m ]
    4967.04
    [m ]
    4967.60
    [m ]
    4972.09
    [m ]