Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.12.2024 - 01:25
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34/10-33 C

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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.
    34/10-33 C
    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.
    RE-CLASS TO TEST
    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.
    34/10-33
    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.
    614-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.
    23
    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,
    10.07.1989
    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.
    01.08.1989
    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.
    01.08.1991
    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.
    01.01.2012
    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/GAS
    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.
    MIDDLE JURASSIC
    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.
    BRENT GP
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    134.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3752.0
    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).
    3587.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    46.1
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    120
    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° 7' 34.44'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 12' 57.1'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6777262.00
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    457756.18
    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.
    1384

  • Wellbore history
    General
    Well 34/10-33 C is a sidetrack from appraisal well 34/10-33 B on the Gullfaks South Discovery. The B sidetrack was drilled to perform a long-period test from a horizontal well through the upper part of the Brent Group, as part of the development of the Gullfaks South discovery. As the test in the B sidetrack failed the C-sidetrack was drilled with the same main objectives, but this sidetrack was not to be drilled horizontally. The test should provide information about requirement for pressure support during oil production, pressure communication in the gas cap during production, treatment of oil with high wax content, and it should collect liquid samples from the reservoir. Secondary objectives for the C sidetrack was to penetrate a complete Rannoch formation down flanks from well 34/10-33 and to establish the oil/water contact in the lower part of the pressure regime (Etive/Rannoch formations).
    Operations and results
    The well 34/10-33 B was abandoned and an EZSV set at 3280 metres. Appraisal well 34/10-33 C was kicked off on 10 July 1989 through the 9 5/8" casing from a Packstock tool set at 3279 metres in the Tarbert Formation. The well bore was drilled with the semi-submersible installation Deepsea Bergen to TD at 3752 m (3587 m TVD) in the Early Jurassic Drake Formation. No significant problems occurred while drilling this well. The well was drilled with Interdrill NT oil based mud from kick-off to TD.
    FMT pressure points defined a gas/oil contact at 3302 m (3242 m TVD MSL) +/- 5 m and an oil/water contact at 3604 m (3460 m TVD MSL) +/- 20 m. Logs and sidewall cores indicated oil down to 3617 m (3467 m TVD MSL). Further shows evaluation from cuttings is uncertain due to oil based mud. The FMT measurements proved a pressure barrier within the interval 3521 - 3550 m (3398 - 3418 TVD MSL) in the Ness Formation.
    Twenty-three sidewall cores were retrieved, but no conventional cores were cut in this well. An FMT wire line fluid sample was taken at 3641 m (3483 m TVD MSL) below OWC in the water zone.
    After long-term testing the well was suspended on 16 September 1989 as an oil and gas appraisal well.
    Testing
    A long-term test was conducted, producing a total of 60 000 Sm3 oil. During the test, from 1 August up to 16 September, the well was classified as test well under the name 34/10-T-33 C.

  • 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]
    3283.00
    3751.00

  • Oil samples at the Norwegian Offshore Directorate
    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    DST 1B
    0.00
    0.00
    11.04.1990 - 00:00
    YES

  • 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
    219.0
    36
    220.0
    0.00
    LOT
    CONDUCTOR
    30
    225.0
    36
    225.0
    0.00
    LOT
    INTERM.
    20
    453.0
    26
    461.0
    1.43
    LOT
    INTERM.
    13 3/8
    1828.0
    17 1/2
    1838.0
    1.53
    LOT
    INTERM.
    9 5/8
    3272.0
    12 1/4
    3493.0
    1.70
    LOT
    LINER
    7
    3751.0
    8 1/2
    3753.0
    0.00
    LOT

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    3448
    3517
    20.6
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    23.000
    16.000
    42.000
    Drill stem tests (DST)
    Test number
    Oil
    [Sm3/day]
    Gas
    [Sm3/day]
    Oil density
    [g/cm3]
    Gas grav. rel.air
    GOR
    [m3/m3]
    1.0
    1635
    305558
    0.859
    0.680
    186

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR
    3160
    3706
    DIFL ACL CDL CN GR
    3271
    3755
    DIPS GR
    3285
    3757
    FMT HP GR
    3281
    3658
    FMT HP GR
    3290
    3507
    MWD - GR DIR
    3281
    3752
    SWC GR
    3350
    3612

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.53
    pdf
    0.71

  • 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
    0.60
    pdf
    31.75

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    3342
    1.55
    33.0
    10.0
    OIL BASED
    19.07.1989
    3348
    1.55
    21.0
    3.5
    WATER BASED
    28.02.1990
    3348
    1.55
    18.0
    2.5
    WATER BASED
    02.03.1990
    3348
    1.55
    15.0
    3.5
    WATER BASED
    27.03.1990
    3348
    1.55
    16.0
    3.0
    WATER BASED
    13.03.1990
    3348
    1.55
    16.0
    3.0
    WATER BASED
    14.03.1990
    3348
    1.55
    17.0
    2.5
    WATER BASED
    05.03.1990
    3409
    1.55
    33.0
    10.0
    OIL BASED
    19.07.1989
    3418
    1.55
    15.0
    3.5
    WATER BASED
    27.03.1990
    3418
    1.55
    15.0
    3.5
    WATER BASED
    27.03.1990
    3430
    1.37
    34.0
    10.0
    OIL BASED
    19.07.1989
    3448
    1.65
    17.0
    3.0
    WATER BASED
    19.03.1990
    3448
    1.65
    17.0
    3.0
    WATER BASED
    19.03.1990
    3448
    1.55
    15.0
    3.0
    WATER BASED
    22.03.1990
    3448
    1.55
    15.0
    3.0
    WATER BASED
    23.03.1990
    3448
    1.55
    15.0
    2.5
    WATER BASED
    26.03.1990
    3448
    1.55
    16.0
    3.0
    WATER BASED
    16.03.1990
    3448
    1.65
    17.0
    3.0
    WATER BASED
    19.03.1990
    3448
    1.55
    15.0
    3.0
    WATER BASED
    20.03.1990
    3448
    1.55
    14.0
    3.0
    WATER BASED
    22.03.1990
    3448
    1.55
    17.0
    3.0
    WATER BASED
    02.04.1990
    3448
    1.45
    19.0
    3.0
    WATER BASED
    04.04.1990
    3448
    1.45
    17.0
    3.0
    WATER BASED
    10.04.1990
    3448
    1.48
    20.0
    3.5
    WATER BASED
    17.04.1990
    3448
    1.48
    20.0
    2.5
    WATER BASED
    23.04.1990
    3448
    1.49
    25.0
    6.0
    WATER BASED
    24.04.1990
    3448
    1.55
    15.0
    3.0
    WATER BASED
    12.03.1990
    3448
    1.55
    26.0
    4.0
    WATER BASED
    27.02.1990
    3448
    1.55
    18.0
    2.5
    WATER BASED
    05.03.1990
    3448
    1.55
    17.0
    2.5
    WATER BASED
    05.03.1990
    3448
    1.55
    18.0
    2.5
    WATER BASED
    05.03.1990
    3448
    1.55
    17.0
    2.0
    WATER BASED
    06.03.1990
    3448
    1.55
    15.0
    3.5
    WATER BASED
    08.03.1990
    3448
    1.55
    13.0
    3.0
    WATER BASED
    08.03.1990
    3448
    1.55
    14.0
    3.0
    WATER BASED
    09.03.1990
    3448
    1.55
    16.0
    3.0
    WATER BASED
    12.03.1990
    3448
    1.55
    15.0
    3.0
    WATER BASED
    12.03.1990
    3448
    1.55
    15.0
    3.5
    WATER BASED
    29.03.1990
    3448
    1.55
    15.0
    3.0
    WATER BASED
    30.03.1990
    3448
    1.55
    20.0
    5.0
    WATER BASED
    02.04.1990
    3448
    1.55
    17.0
    3.0
    WATER BASED
    02.04.1990
    3448
    1.55
    16.0
    3.0
    WATER BASED
    02.04.1990
    3448
    1.55
    20.0
    3.0
    WATER BASED
    06.04.1990
    3448
    1.45
    17.0
    3.0
    WATER BASED
    06.04.1990
    3448
    1.45
    17.0
    3.0
    WATER BASED
    10.04.1990
    3448
    1.45
    18.0
    3.0
    WATER BASED
    10.04.1990
    3448
    1.48
    18.0
    3.5
    WATER BASED
    10.04.1990
    3448
    1.48
    18.0
    3.0
    WATER BASED
    17.04.1990
    3448
    1.48
    20.0
    3.5
    WATER BASED
    17.04.1990
    3448
    1.48
    20.0
    3.5
    WATER BASED
    17.04.1990
    3448
    1.48
    20.0
    3.5
    WATER BASED
    17.04.1990
    3448
    1.48
    21.0
    3.5
    WATER BASED
    17.04.1990
    3448
    1.48
    21.0
    3.5
    WATER BASED
    17.04.1990
    3448
    1.48
    20.0
    3.0
    WATER BASED
    18.04.1990
    3448
    1.48
    20.0
    3.5
    WATER BASED
    19.04.1990
    3448
    1.48
    18.0
    2.5
    WATER BASED
    23.04.1990
    3448
    1.48
    23.0
    4.5
    WATER BASED
    23.04.1990
    3448
    1.47
    23.0
    4.5
    WATER BASED
    25.04.1990
    3581
    1.55
    35.0
    10.0
    OIL BASED
    19.07.1989
    3715
    1.55
    17.0
    5.5
    WATER BASED
    26.07.1989
    3715
    1.55
    16.0
    9.5
    WATER BASED
    28.07.1989
    3715
    1.55
    15.0
    5.5
    WATER BASED
    31.07.1989
    3715
    1.55
    12.0
    4.0
    WATER BASED
    31.07.1989
    3715
    1.55
    15.0
    5.0
    WATER BASED
    31.07.1989
    3730
    1.55
    35.0
    10.5
    OIL BASED
    20.07.1989
    3751
    1.57
    47.0
    14.0
    OIL BASED
    26.07.1989
    3751
    1.55
    38.0
    9.5
    OIL BASED
    26.07.1989
    3752
    1.55
    38.0
    10.0
    OIL BASED
    21.07.1989
    3752
    1.55
    37.0
    10.5
    OIL BASED
    26.07.1989
    3752
    1.55
    37.0
    10.5
    OIL BASED
    26.07.1989