Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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31.10.2024 - 01:27
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35/11-11

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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.
    35/11-11
    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
    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
    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.
    35/11-11
    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.
    Norsk Hydro Produksjon 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.
    927-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.
    37
    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,
    16.04.1998
    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.
    22.05.1998
    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.
    22.05.2000
    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.
    15.06.2005
    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.
    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.
    23.5
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    359.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3225.0
    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).
    3224.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    3.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    115
    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.
    DRAKE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 6' 31.42'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 33' 49.08'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6775189.73
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    530381.59
    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.
    3356

  • Wellbore history
    General
    Well 35/11-11 is located east of the Fram Field and ca 17 km North of the Troll Field. The main objective for well 35/11-11 was to appraise the eastward extension of the Oxfordian Turbidites (Intra Heather Sandstone unit), in the H-East compartment of the Fram Field. Oil and gas were encountered in the discovery well 35/11-8 S and the extension toward the south was confirmed by the drilling of well 35/11-9, which encountered good reservoir quality and pressure communication between the two wells. Possible hydrocarbons in the Brent Group was a secondary objective, although the well was expected to penetrate the Brent Group in a down flank position below the OWC. A third objective was Paleocene sands to assess the reservoir- and production properties as a source for make-up water. This interval was supposed to be penetrated close to a high amplitude reflector and the presence of hydrocarbons could not be excluded.
    Operations and results
    Wildcat well 35/11-11 was spudded with the semi-submersible installation Transocean Leader on 16 April 1998 and drilled to TD at 3225 m in the Early Jurassic Drake Formation. Operations went without significant problems. The well was drilled with spud mud down to 1253 m and with AQUACOL/KCl/polymer mud and freshwater from 1253 m to TD. AQUACOL is a glycol mud system.
    Two sands equivalent to the Heimdal and Ty Formations were encountered in the Paleocene. Both were water wet. A total of 119 m gross Late Jurassic reservoir sequence was penetrated in well 35/11-11 on the H East Structure. All massive sands have been interpreted as three individual turbidite deposits of Kimmeridgian/Volgian (Intra Draupne Sand), Oxfordian (Intra Heather Sand) and Callovian (Intra Heather Sand) age respectively. Oil shows were recorded on sandstones and siltstones throughout Late Jurassic, but all main target reservoirs were found water bearing and not in pressure communication with the H Structure. In the Brent Group the Ness and Etive Formations were found poorly developed with no shows of hydrocarbons. A total of nine conventional cores were cut in the Late - Middle Jurassic, recovering 181 m in all. No core was obtained from the Paleocene.
    The well was permanently abandoned on 22 May 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]
    1260.00
    3225.00

  • 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
    2550.5
    2551.0
    [m ]
    2
    2552.0
    2569.2
    [m ]
    3
    2570.0
    2597.0
    [m ]
    4
    2597.5
    2620.0
    [m ]
    5
    2621.0
    2638.2
    [m ]
    6
    2638.3
    2647.0
    [m ]
    7
    2695.5
    2722.0
    [m ]
    8
    2723.0
    2767.4
    [m ]
    9
    3085.0
    3102.3
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    181.4
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2550-2551m
    Core photo at depth: 2552-2557m
    Core photo at depth: 2557-2562m
    Core photo at depth: 2562-2567m
    Core photo at depth: 2567-2569m
    2550-2551m
    2552-2557m
    2557-2562m
    2562-2567m
    2567-2569m
    Core photo at depth: 2570-2575m
    Core photo at depth: 2575-2580m
    Core photo at depth: 2580-2585m
    Core photo at depth: 2585-2590m
    Core photo at depth: 2590-2595m
    2570-2575m
    2575-2580m
    2580-2585m
    2585-2590m
    2590-2595m
    Core photo at depth: 2595-2597m
    Core photo at depth: 2597-2602m
    Core photo at depth: 2602-2607m
    Core photo at depth: 2607-2612m
    Core photo at depth: 2612-2617m
    2595-2597m
    2597-2602m
    2602-2607m
    2607-2612m
    2612-2617m
    Core photo at depth: 2617-2620m
    Core photo at depth: 2621-2626m
    Core photo at depth: 2626-2631m
    Core photo at depth: 2631-2636m
    Core photo at depth: 2636-2638m
    2617-2620m
    2621-2626m
    2626-2631m
    2631-2636m
    2636-2638m
    Core photo at depth: 2638-2643m
    Core photo at depth: 2643-2646m
    Core photo at depth: 2695-2700m
    Core photo at depth: 2700-2705m
    Core photo at depth: 2705-2710m
    2638-2643m
    2643-2646m
    2695-2700m
    2700-2705m
    2705-2710m
    Core photo at depth: 2710-2715m
    Core photo at depth: 2715-2720m
    Core photo at depth: 2720-2721m
    Core photo at depth: 2723-2728m
    Core photo at depth: 2728-2733m
    2710-2715m
    2715-2720m
    2720-2721m
    2723-2728m
    2728-2733m
    Core photo at depth: 2733-2738m
    Core photo at depth: 2738-2743m
    Core photo at depth: 2743-2748m
    Core photo at depth: 2748-2753m
    Core photo at depth: 2753-2758m
    2733-2738m
    2738-2743m
    2743-2748m
    2748-2753m
    2753-2758m
    Core photo at depth: 2758-2763m
    Core photo at depth: 2763-2767m
    Core photo at depth: 3085-3090m
    Core photo at depth: 3090-3095m
    Core photo at depth: 3095-3100m
    2758-2763m
    2763-2767m
    3085-3090m
    3090-3095m
    3095-3100m
    Core photo at depth: 3100-3102m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    3100-3102m

  • 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
    444.0
    36
    444.0
    0.00
    LOT
    SURF.COND.
    13 3/8
    1245.0
    17 1/2
    1245.0
    1.63
    LOT
    OPEN HOLE
    2550.0
    12 1/4
    2550.0
    0.00
    LOT
    OPEN HOLE
    3225.0
    8 1/2
    3225.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    FMS NGT AMS
    2450
    3175
    HALS TLD HGNS DSI AMS
    1245
    3225
    MDT GR AMS
    1626
    3167
    MWD - GR RES DIR
    1250
    3225
    VSP GR
    1250
    3150

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.53

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    3.81

  • 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
    17.28
    pdf
    2.30

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    345
    1.20
    15.0
    WATER BASED
    450
    1.33
    32.0
    WATER BASED
    1145
    1.33
    32.0
    WATER BASED
    1253
    1.03
    11.0
    WATER BASED
    1520
    1.32
    32.0
    WATER BASED
    1891
    1.25
    22.0
    WATER BASED
    2177
    1.25
    25.0
    WATER BASED
    2505
    1.26
    30.0
    WATER BASED
    2605
    1.26
    29.0
    WATER BASED
    2648
    1.28
    28.0
    WATER BASED
    2723
    1.27
    31.0
    WATER BASED
    3225
    1.27
    30.0
    WATER BASED

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2457.0
    [m]
    DC
    PETROSTR
    2467.0
    [m]
    DC
    PETROS
    2472.0
    [m]
    DC
    PETROS
    2482.0
    [m]
    DC
    PETROS
    2490.0
    [m]
    DC
    PETROS
    2505.0
    [m]
    DC
    PETROS
    2510.0
    [m]
    DC
    PETROS
    2520.0
    [m]
    DC
    PETROS
    2525.0
    [m]
    DC
    PETROS
    2535.0
    [m]
    DC
    PETROS
    2540.0
    [m]
    DC
    PETROS
    2545.0
    [m]
    DC
    PETROS
    2547.0
    [m]
    DC
    PETROS
    2550.0
    [m]
    DC
    PETROS
    2555.3
    [m]
    C
    PETROS
    2556.3
    [m]
    C
    PETROS
    2560.4
    [m]
    C
    PETROS
    2568.2
    [m]
    C
    PETROS
    2571.1
    [m]
    C
    PETROS
    2571.5
    [m]
    C
    HYDRO
    2571.8
    [m]
    C
    HYDRO
    2573.1
    [m]
    C
    PETROSTR
    2576.2
    [m]
    C
    PETROSTR
    2580.4
    [m]
    C
    PETROS
    2584.9
    [m]
    C
    PETROS
    2585.4
    [m]
    C
    PETROS