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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34/4-9 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.
    34/4-9 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
    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
    Field
    Name of the field the wellbore is related to.
    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.
    34/4-9
    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.
    Saga Petroleum ASA
    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.
    865-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.
    39
    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,
    08.01.1997
    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.
    15.02.1997
    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.
    15.02.1999
    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.
    03.01.2012
    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.
    LATE TRIASSIC
    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.
    LUNDE 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.
    334.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3440.0
    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).
    3388.3
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    29.6
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    106
    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 TRIASSIC
    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.
    LUNDE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 30' 44.75'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 10' 18.12'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6820309.22
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    455922.81
    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.
    2931

  • Wellbore history
    General
    Well 34/4-9 S was drilled on the northern part of the Western Central Fault Block (WCFB) on the Snorre Field in the northern North Sea. This is an appraisal well and the main objectives were to contribute to the technical basis for Snorre North PDO and to reduce the uncertainties in reservoir quality. The reservoir level in this part of Snorre is the Late Triassic Lunde Formation.
    Operations and results
    Appraisal well 34/4-9 S was spudded with the semi-submersible installation Scarabeo 5 on 8 January 1997 and drilled to TD at 3440 m (3388 m TVD) in the Late Triassic Lunde Formation. The well was drilled vertical down to 2700 m, from where it built angle up to 24.9 deg at TD with maximum 29.6 deg at 3370 m. The well was drilled with spud mud down to 1235 m, with KCl mud from 1235 m to 1866 m, and with Ancovert oil based mud from 1866 m to TD.
    Top of the reservoir ( L01) was encountered at 2512.5 m, 12.5 m deeper than prognosed. The conventional core indicated oil down to 2621.5 m (2596 m TVD MSL) (oil stained sandstones), and the interpretation of pressure gradients (MDT data) indicate an OWC at 2619 m (2594 m TVD MSL). However, the wire line logs indicate high water saturation in the sandstone from 2616.5 - 2622 m (2590.5 - 2597 m TVD MSL) with deepest oil down to 2608 m (2583m TVD MSL). The oil-water contact is therefore set to 2616 m (2590 m TVD MSL).
    Three cores were cut consecutively over a 209 m long section from 2515 m to 2724 m in the upper part of the Lunde formation with a total recovery of 99.7 %. The core-to-log shifts were -0.61 m for core 1, -1.11 m for core 2, and -0.36 m for core 3. A 2 3/4 gal fluid sample was obtained at 2583 m. Laboratory measurements indicated that the fluid sample was contaminated by 18-22% base oil.
    The well was permanently abandoned on 15 February 1997 as an oil appraisal well.
    Testing
    No drill stem test was performed.

  • 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
    2515.0
    2597.5
    [m ]
    2
    2598.0
    2658.8
    [m ]
    3
    2659.0
    2723.5
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    207.8
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2515-2520m
    Core photo at depth: 2520-2525m
    Core photo at depth: 2525-2530m
    Core photo at depth: 2530-2535m
    Core photo at depth: 2535-2540m
    2515-2520m
    2520-2525m
    2525-2530m
    2530-2535m
    2535-2540m
    Core photo at depth: 2540-2545m
    Core photo at depth: 2545-2550m
    Core photo at depth: 2550-2555m
    Core photo at depth: 2555-2560m
    Core photo at depth: 2560-2565m
    2540-2545m
    2545-2550m
    2550-2555m
    2555-2560m
    2560-2565m
    Core photo at depth: 2565-2570m
    Core photo at depth: 2570-2575m
    Core photo at depth: 2575-2580m
    Core photo at depth: 2580-2585m
    Core photo at depth: 2585-2590m
    2565-2570m
    2570-2575m
    2575-2580m
    2580-2585m
    2585-2590m
    Core photo at depth: 2590-2595m
    Core photo at depth: 2595-2597m
    Core photo at depth: 2598-2603m
    Core photo at depth: 2603-2608m
    Core photo at depth: 2608-2613m
    2590-2595m
    2595-2597m
    2598-2603m
    2603-2608m
    2608-2613m
    Core photo at depth: 2613-2618m
    Core photo at depth: 2618-2623m
    Core photo at depth: 2623-2628m
    Core photo at depth: 2628-2633m
    Core photo at depth: 2633-2638m
    2613-2618m
    2618-2623m
    2623-2628m
    2628-2633m
    2633-2638m
    Core photo at depth: 2638-2643m
    Core photo at depth: 2643-2648m
    Core photo at depth: 2648-2653m
    Core photo at depth: 2653-2658m
    Core photo at depth: 2658-2659m
    2638-2643m
    2643-2648m
    2648-2653m
    2653-2658m
    2658-2659m
    Core photo at depth: 2659-2664m
    Core photo at depth: 2664-2669m
    Core photo at depth: 2664-2669m
    Core photo at depth: 2669-2674m
    Core photo at depth: 2674-2679m
    2659-2664m
    2664-2669m
    2664-2669m
    2669-2674m
    2674-2679m
    Core photo at depth: 2679-2684m
    Core photo at depth: 2684-2689m
    Core photo at depth: 2689-2694m
    Core photo at depth: 2694-2699m
    Core photo at depth: 2699-2704m
    2679-2684m
    2684-2689m
    2689-2694m
    2694-2699m
    2699-2704m
    Core photo at depth: 2704-2709m
    Core photo at depth: 2709-2714m
    Core photo at depth: 2714-2719m
    Core photo at depth: 2719-2723m
    Core photo at depth:  
    2704-2709m
    2709-2714m
    2714-2719m
    2719-2723m

  • 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
    397.0
    36
    411.0
    0.00
    LOT
    SURF.COND.
    18 5/8
    507.0
    26
    514.0
    0.00
    LOT
    PILOT HOLE
    520.0
    9 7/8
    520.0
    0.00
    LOT
    INTERM.
    13 3/8
    1228.0
    17 1/2
    1235.0
    1.86
    LOT
    INTERM.
    9 5/8
    1858.0
    12 1/4
    1866.0
    2.21
    LOT
    OPEN HOLE
    3440.0
    8 1/2
    3440.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    ACBL GR
    2070
    2449
    ACL GR
    2449
    3523
    COREGUN
    2895
    3149
    DIFL ACL ZDL CN GR SP CHT
    330
    1271
    DISFL ACL SP GR CAL CHT
    1344
    2466
    DLL MLL ACL ZDL CN GR SP
    2487
    3274
    DLL MLL CAL GR SP CHT
    1862
    3509
    FMT GR
    2921
    3190
    FMT GR
    2926
    0
    FMT GR
    2926
    2973
    FMT GR CHT
    2921
    3290
    FMT GR CHT
    2931
    3486
    HEXDIP GR
    2449
    3506
    MWD - GR RES DIR
    330
    3530
    VSP
    480
    2440
    VSP
    1360
    3520
    ZDL CNC GR CHT
    2449
    3531

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    359
    1680
    1680
    1720
    1850
    2474
    2474
    2495
    2513
    2513

  • 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
    0.90
    pdf
    12.75

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    520
    1.12
    8.0
    29.0
    spud mud
    1235
    1.19
    21.0
    23.0
    spud mud
    1866
    1.48
    29.0
    36.0
    KCL mud
    2013
    1.48
    29.0
    33.0
    oil based
    2500
    1.60
    38.0
    19.0
    oil based