Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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01.11.2024 - 01:26
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34/10-41 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.
    34/10-41 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
    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.
    34/10-41
    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.
    890-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.
    47
    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,
    13.07.1997
    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.
    28.08.1997
    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.
    28.08.1999
    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.
    06.01.2014
    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.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    141.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3420.0
    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).
    2658.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    61.8
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    98
    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° 13' 54.34'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 5' 42.3'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6789100.19
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    451412.46
    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.
    3085

  • Wellbore history
    General
    Well 34/10-41 S was drilled west of the Gullfaks Field and slightly south of the Tordis Field on the Tampen Spur in the North Sea. The primary objective was to test the hydrocarbon potential in the "A-prospect" at Middle Jurassic Brent Group level. The secondary objective was to test the Early Jurassic Statfjord Group.
    Operations and results
    Wildcat well 34/10-41 S was spudded with the semi-submersible installation Deepsea Trym on 13 July 1997 and drilled to TD at 3420 m in the Early Jurassic Statfjord Group. At 3098 m problems with steering and hole angle made it necessary to sidetrack in order to reach the planned secondary target at top Statfjord Group. The well was plugged back ca 270 m and sidetracked (34/10-41 S T2) from 2913 m. The well was drilled with spud mud down to 1050 m and with Quadrill KCl/glycol mud in both well tracks below 1050 m to TD.
    The top of the Brent Group was penetrated at 2553 m, approximately 18 m above the prognosed depth, and proved to be dry. The seismic anomaly in top of the prospect turned out to be a lithology effect. From the claystone in the Heather Formation, a very calcareous sandstone was penetrated in the Tarbert Formation. It is believed that this transition to a high velocity layer is the cause of the amplitude. The Statfjord Group was penetrated at 3367.5 m and was also proven dry. Except for occasional fluorescence and cut in claystones between 2472 m and 2775 m there were no shows in the well. The lack of migrated oil was in agreement with post-well organic geochemical analyses, where extracts proved to be more or less contaminated by the mud and devoid of typical migrated hydrocarbons.
    No cores were cut and no wire line fluid samples were taken in the well.
    The well was permanently abandoned on 28 August 1997 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]
    1060.00
    3419.00

  • 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
    224.0
    36
    224.0
    0.00
    LOT
    PILOT HOLE
    530.0
    9 5/8
    530.0
    0.00
    LOT
    SURF.COND.
    20
    1046.0
    26
    1050.0
    1.63
    LOT
    INTERM.
    9 5/8
    2109.0
    12 1/4
    2119.0
    1.97
    LOT
    OPEN HOLE
    3420.0
    8 1/2
    3420.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    DLL MAC SDL CHT
    2108
    3410
    FMT QD SGR CHT
    2557
    2567
    MWD - DPR 2A
    2119
    3420
    MWD - DPR VSS
    224
    2119
    SWC GR
    2498
    2654
    VSP GR
    805
    2885
    ZDL CND DGR CHT
    2108
    3419

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.08
    pdf
    2.04

  • 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
    42.41

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    530
    1.03
    SEAWATER/PAC
    767
    1.03
    SEAWATER/PAC
    1050
    1.20
    17.0
    SEAWATER/PAC
    1254
    1.14
    17.0
    QUADRILL
    1450
    1.25
    16.0
    QUADRILL
    2119
    1.50
    22.0
    QUADRILL
    2529
    1.67
    41.0
    QUADRILL
    2557
    1.67
    47.0
    QUADRILL
    3090
    1.67
    39.0
    QUADRILL
    3420
    1.67
    42.0
    QUADRILL

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1060.0
    [m]
    DC
    GEOSTR
    1070.0
    [m]
    DC
    GEOSTR
    1090.0
    [m]
    DC
    GEOSTR
    1100.0
    [m]
    DC
    GEOSTR
    1140.0
    [m]
    DC
    GEOSTR
    1170.0
    [m]
    DC
    GEOSTR
    1180.0
    [m]
    DC
    GEOSTR
    1200.0
    [m]
    DC
    GEOSTR
    1210.0
    [m]
    DC
    GEOSTR
    1230.0
    [m]
    DC
    GEOSTR
    1240.0
    [m]
    DC
    GEOSTR
    1260.0
    [m]
    DC
    GEOSTR
    1270.0
    [m]
    DC
    GEOSTR
    1290.0
    [m]
    DC
    GEOSTR
    1300.0
    [m]
    DC
    GEOSTR
    1320.0
    [m]
    DC
    GEOSTR
    1330.0
    [m]
    DC
    GEOSTR
    1360.0
    [m]
    DC
    GEOSTR
    1370.0
    [m]
    DC
    GEOSTR
    1410.0
    [m]
    DC
    GEOSTR
    1430.0
    [m]
    DC
    GEOSTR
    1440.0
    [m]
    DC
    GEOSTR
    1460.0
    [m]
    DC
    GEOSTR
    1470.0
    [m]
    DC
    GEOSTR
    1490.0
    [m]
    DC
    GEOSTR
    1500.0
    [m]
    DC
    GEOSTR
    1520.0
    [m]
    DC
    GEOSTR
    1530.0
    [m]
    DC
    GEOSTR
    1550.0
    [m]
    DC
    GEOSTR
    1560.0
    [m]
    DC
    GEOSTR
    1580.0
    [m]
    DC
    GEOSTR
    1590.0
    [m]
    DC
    GEOSTR
    1610.0
    [m]
    DC
    GEOSTR
    1620.0
    [m]
    DC
    GEOSTR
    1640.0
    [m]
    DC
    GEOSTR
    1650.0
    [m]
    DC
    GEOSTR
    1670.0
    [m]
    DC
    GEOSTR
    1680.0
    [m]
    DC
    GEOSTR
    1690.0
    [m]
    DC
    GEOSTR
    1710.0
    [m]
    DC
    GEOSTR
    1730.0
    [m]
    DC
    GEOSTR
    1740.0
    [m]
    DC
    GEOSTR
    1760.0
    [m]
    DC
    GEOSTR
    1770.0
    [m]
    DC
    GEOSTR
    1790.0
    [m]
    DC
    GEOSTR
    1800.0
    [m]
    DC
    GEOSTR
    1820.0
    [m]
    DC
    GEOSTR
    1830.0
    [m]
    DC
    GEOSTR
    1850.0
    [m]
    DC
    GEOSTR
    1860.0
    [m]
    DC
    GEOSTR
    1880.0
    [m]
    DC
    GEOSTR
    1890.0
    [m]
    DC
    GEOSTR
    1910.0
    [m]
    DC
    GEOSTR
    1920.0
    [m]
    DC
    GEOSTR
    1940.0
    [m]
    DC
    GEOSTR
    1950.0
    [m]
    DC
    GEOSTR
    1970.0
    [m]
    DC
    GEOSTR
    1980.0
    [m]
    DC
    GEOSTR
    2000.0
    [m]
    DC
    GEOSTR
    2010.0
    [m]
    DC
    GEOSTR
    2030.0
    [m]
    DC
    GEOSTR
    2040.0
    [m]
    DC
    GEOSTR
    2070.0
    [m]
    DC
    GEOSTR
    2090.0
    [m]
    DC
    GEOSTR
    2100.0
    [m]
    DC
    GEOSTR
    2120.0
    [m]
    DC
    GEOSTR
    2130.0
    [m]
    DC
    GEOSTR
    2160.0
    [m]
    DC
    GEOSTR
    2180.0
    [m]
    DC
    GEOSTR
    2190.0
    [m]
    DC
    GEOSTR
    2210.0
    [m]
    DC
    GEOSTR
    2230.0
    [m]
    DC
    GEOSTR
    2250.0
    [m]
    DC
    GEOSTR
    2260.0
    [m]
    DC
    GEOSTR
    2280.0
    [m]
    DC
    GEOSTR
    2290.0
    [m]
    DC
    GEOSTR
    2310.0
    [m]
    DC
    GEOSTR
    2320.0
    [m]
    DC
    GEOSTR
    2340.0
    [m]
    DC
    GEOSTR
    2350.0
    [m]
    DC
    GEOSTR
    2370.0
    [m]
    DC
    GEOSTR
    2390.0
    [m]
    DC
    GEOSTR
    2400.0
    [m]
    DC
    GEOSTR
    2410.0
    [m]
    DC
    GEOSTR
    2430.0
    [m]
    DC
    GEOSTR
    2450.0
    [m]
    DC
    GEOSTR
    2453.0
    [m]
    DC
    GEOSTR
    2471.0
    [m]
    DC
    GEOSTR
    2486.0
    [m]
    DC
    GEOSTR
    2501.0
    [m]
    DC
    GEOSTR
    2504.0
    [m]
    SWC
    WESTL
    2506.5
    [m]
    SWC
    WESTL
    2508.0
    [m]
    SWC
    WESTL
    2516.0
    [m]
    SWC
    WESTL
    2516.0
    [m]
    DC
    GEOST
    2526.0
    [m]
    SWC
    WESTL
    2528.0
    [m]
    DC
    GEOST
    2537.0
    [m]
    SWC
    WESTL
    2543.0
    [m]
    DC
    GEOST
    2545.0
    [m]
    SWC
    WESTL
    2555.0
    [m]
    DC
    GEOST
    2557.0
    [m]
    SWC
    WESTL
    2558.0
    [m]
    DC
    GEOST
    2561.0
    [m]
    SWC
    WESTL
    2570.0
    [m]
    DC
    GEOST
    2591.0
    [m]
    DC
    GEOST
    2597.0
    [m]
    DC
    GEOST
    2603.0
    [m]
    DC
    GEOST
    2610.0
    [m]
    DC
    GEOST
    2613.0
    [m]
    SWC
    WESTL
    2621.0
    [m]
    SWC
    WESTL
    2625.0
    [m]
    DC
    GEOST
    2634.0
    [m]
    DC
    GEOST
    2640.0
    [m]
    DC
    GEOST
    2661.0
    [m]
    DC
    GEOST
    2669.0
    [m]
    DC
    GEOST
    2678.0
    [m]
    DC
    GEOST
    2681.0
    [m]
    DC
    GEOST
    2687.0
    [m]
    DC
    GEOST
    2694.0
    [m]
    DC
    GEOST
    2700.0
    [m]
    DC
    GEOST
    2703.0
    [m]
    DC
    GEOST
    2709.0
    [m]
    DC
    GEOST
    2712.0
    [m]
    DC
    GEOST
    2724.0
    [m]
    DC
    GEOST
    2730.0
    [m]
    DC
    GEOST
    2739.0
    [m]
    DC
    GEOST
    2742.0
    [m]
    DC
    GEOST
    2748.0
    [m]
    DC
    GEOST
    2757.0
    [m]
    DC
    GEOST
    2763.0
    [m]
    DC
    GEOST
    2772.0
    [m]
    DC
    GEOST
    2778.0
    [m]
    DC
    GEOST
    2784.0
    [m]
    DC
    GEOST
    2790.0
    [m]
    DC
    GEOST
    2796.0
    [m]
    DC
    GEOST
    2802.0
    [m]
    DC
    GEOST
    2808.0
    [m]
    DC
    GEOST
    2812.0
    [m]
    DC
    GEOST
    2820.0
    [m]
    DC
    GEOST
    2823.0
    [m]
    DC
    GEOST
    2829.0
    [m]
    DC
    GEOST
    2835.0
    [m]
    DC
    GEOST
    2841.0
    [m]
    DC
    GEOST
    2847.0
    [m]
    DC
    GEOST
    2853.0
    [m]
    DC
    GEOST
    2859.0
    [m]
    DC
    GEOST
    2868.0
    [m]
    DC
    GEOST
    2874.0
    [m]
    DC
    GEOST
    2880.0
    [m]
    DC
    GEOST
    2886.0
    [m]
    DC
    GEOST
    2892.0
    [m]
    DC
    GEOST
    2898.0
    [m]
    DC
    GEOST
    2905.0
    [m]
    DC
    GEOST
    2914.0
    [m]
    DC
    GEOST
    2917.0
    [m]
    DC
    GEOST
    2923.0
    [m]
    DC
    GEOST
    2929.0
    [m]
    DC
    GEOST
    2935.0
    [m]
    DC
    GEOST
    2941.0
    [m]
    DC
    GEOST
    2947.0
    [m]
    DC
    GEOST
    2956.0
    [m]
    DC
    GEOST
    2962.0
    [m]
    DC
    GEOST
    2971.0
    [m]
    DC
    GEOST
    2976.0
    [m]
    DC
    GEOST
    2977.0
    [m]
    DC
    GEOST