Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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16.07.2024 - 01:28
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33/9-8

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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.
    33/9-8
    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
    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.
    33/9-8
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    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.
    Mobil Exploration Norway INC
    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.
    169-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.
    100
    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,
    11.11.1976
    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.
    18.02.1977
    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.
    18.02.1979
    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.
    30.09.2015
    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
    Reentry
    Status whether the wellbore has been re-entered (YES) or not (NO). Re-entered wellbores are not included in the count when wellbores are presented in statistical overviews.
    NO
    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.
    YES
    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 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.
    INTRA DRAUPNE FM SS
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    265.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3085.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    109
    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° 26' 17.44'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 55' 4.87'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6812236.26
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    442286.97
    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.
    413
  • Wellbore history

    General
    Well 33/9-8, was drilled on a prospect north of the main Statfjord Field in the Tampen Spur area in the northern North Sea. The primary objective was to test sandstones in the Brent Group. Secondary objective was the Statfjord Group
    Operations and results
    Wildcat well 33/9-8 was spudded with the semi-submersible installation Deepsea Bergen on 11 November 1976 and drilled to TD at 3085 m in the Statfjord Group. The original hole was abandoned at 2974 with stuck pipe. A technical sidetrack was kicked off from 2533 m. Top Brent Group is 6 m deeper in the sidetrack compared to in the original hole.
    The sand and sand stringers generally associated with the lower portion of the Paleocene in the area were not developed in 33/9-8. An oil filled Intra-Draupne Formation sandstone was penetrated at 2670 m. This was the first encounter of Late Jurassic sandstone in the 037 License area. The gross thickness of this sandstone is 45.8 m. Net sand was found to be 34.8 m with 27% average porosity, based on log analysis. The whole sand was oil filled down to top Heather Formation at 2716 m. The Brent Group sandstones was encountered at 2740 m with oil down to the OWC at 2741.5 m. Gross thickness of the Brent Group sandstones was 140.3 m. Net sand was found to be 124 m with 22% average porosity. The secondary objective Statfjord Group was water wet without shows.
    Three cores were cut in Late Jurassic Viking Group the interval 2670 to 2724.8 m (54.8m). The core recoveries were 2670 to 2671.27 m (7%), 2688.5 to 2706.26 m (97%), and 2706.8 to 2724.5 m (98%) for cores one, two, and three, respectively. The cores were cut in the original hole. Add six meters to the core depths to match with the well logs, which were run in the sidetrack. No fluid samples were taken on wire line
    The well was permanently abandoned on 18 February 1977 as an oil discovery.
    Testing
    Three drill stem tests were performed.
    DST 1 tested the interval 2745.5 to 2748.5 m in the Brent Group. The aim was to locate the oil/water contact. The test produced 1313 m3 water/day through a 3/4" choke. A trace of oil appeared with the water near the end of the test. The bottom hole temperature in the test was 99.2 °C
    DST 2 tested the interval 2737.0 to 2741.5 m across the border between the Heather Formation and the Brent Group. The aim was to locate the oil/water contact. This test produced 1003 Sm3 oil and 32900 Sm3 gas /day through a 3/4" choke. The GOR was 33 Sm3/Sm3, the oil gravity was 37.4 °API and the gas gravity was 0.752 (air = 1). The bottom hole temperature in the test was 100 °C.
    DST 3 tested the interval 2683.0 to 2686.0 m in Intra Draupne Formation sandstone. The test produced 1997 Sm3 oil and 80730 Sm3 gas /day through a 3/4" choke. The GOR was 40 Sm3/Sm3, the oil gravity was 38.1 °API, and the gas gravity was 0.757 (air = 1). The bottom hole temperature in the test was 95.6 °C.
  • Cuttings at the Norwegian Offshore Directorate

    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    NO
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    390.00
    3085.00
  • 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
    2670.0
    2671.0
    [m ]
    2
    2688.5
    2706.3
    [m ]
    3
    2706.8
    2724.5
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    36.5
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 2670-2671m
    Core photo at depth: 2689-2690m
    Core photo at depth: 2692-2693m
    Core photo at depth: 2694-2695m
    Core photo at depth: 2697-2698m
    2670-2671m
    2689-2690m
    2692-2693m
    2694-2695m
    2697-2698m
    Core photo at depth: 2700-2701m
    Core photo at depth: 2702-2703m
    Core photo at depth: 2704-2706m
    Core photo at depth: 2706-2709m
    Core photo at depth: 2709-2712m
    2700-2701m
    2702-2703m
    2704-2706m
    2706-2709m
    2709-2712m
    Core photo at depth: 2712-2714m
    Core photo at depth: 2714-2717m
    Core photo at depth: 2717-2720m
    Core photo at depth: 2720-2723m
    Core photo at depth: 2723-2724m
    2712-2714m
    2714-2717m
    2717-2720m
    2720-2723m
    2723-2724m
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2671.0
    [m]
    C
    2688.9
    [m]
    C
    2689.0
    [m]
    C
    2694.0
    [m]
    C
    2694.0
    [m]
    C
    OD
    2700.2
    [m]
    C
    OD
    2700.5
    [m]
    C
    2701.0
    [m]
    C
    2701.2
    [m]
    C
    2702.0
    [m]
    C
    2702.0
    [m]
    C
    OD
    2702.3
    [m]
    C
    2703.0
    [m]
    C
    2704.7
    [m]
    C
    OD
    2705.4
    [m]
    C
    2706.0
    [m]
    C
    2708.0
    [m]
    C
    2709.0
    [m]
    C
    2710.0
    [m]
    C
    OD
    2710.0
    [m]
    C
    2710.4
    [m]
    C
    OD
    2710.9
    [m]
    C
    2713.1
    [m]
    C
    OD
    2714.0
    [m]
    C
    OD
    2714.9
    [m]
    C
    OD
    2716.7
    [m]
    C
    2719.3
    [m]
    C
    2720.0
    [m]
    C
    OD
    2722.1
    [m]
    C
    OD
    2722.1
    [m]
    C
    2723.0
    [m]
    C
    OD
  • Lithostratigraphy

  • 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
    2.09
    pdf
    8.31
  • Drill stem tests (DST)

    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2746
    2749
    12.5
    2.0
    2737
    2742
    19.0
    3.0
    2683
    2686
    19.0
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    2.0
    3.0
    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
    2.0
    1005
    32104
    0.820
    0.752
    3.0
    2000
    80731
    0.840
    0.757
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL
    1656
    3053
    CDM
    1856
    3084
    DLL MSFL
    1857
    3085
    FDC CNL
    698
    3084
    ISF SON
    386
    3083
    SRS
    385
    2945
  • 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
    386.0
    36
    387.0
    0.00
    SURF.COND.
    20
    696.0
    26
    710.0
    0.00
    INTERM.
    13 3/8
    1856.0
    17 1/2
    1870.0
    0.00
    INTERM.
    9 5/8
    3073.0
    12 1/4
    3085.0
    0.00
  • Thin sections at the Norwegian Offshore Directorate

    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    2694.00
    [m ]
    2699.00
    [m ]
    2702.00
    [m ]
    2760.00
    [m ]
    2690.00
    [m ]
    2696.00
    [m ]
    2700.00
    [m ]
    2704.00
    [m ]
    2710.00
    [m ]
    2746.00
    [m ]