Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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28.04.2024 - 01:35
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33/9-7

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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.
    33/9-7
    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.
    33/9-7
    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.
    165-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.
    58
    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,
    11.09.1976
    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.
    07.11.1976
    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.
    07.11.1978
    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.
    24.09.2015
    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.
    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.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    155.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3127.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    91
    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.
    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.
    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° 20' 12.17'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 59' 12.66'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6800875.60
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    445782.73
    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.
    412

  • Wellbore history
    General
    Well 33/9-7, was drilled on the 33/9-Alpha prospect, 2.5 km east of the Statfjord Field in the Tampen Spur area in the northern North Sea. The primary objective was to test a part of the Brent-Statfjord trend separated from the Statfjord Field to the west by a structural saddle. The primary target was the Brent Group sandstones. Sandstones within the Statfjord Group was a secondary target.
    Operations and results
    Wildcat well 33/9-7 was spudded with the semi-submersible installation Dyvi Alpha on 11 September 1976 and drilled to TD at 3127 m in the Statfjord Group.
    Good oil and gas shows seen in a 50-meter thick sequence of interbedded sands and claystones in the lower portion of the Paleocene from 1770-1820 m. The sands although not apparently continuous, were oil stained and had good gas shows throughout the interval. Log evaluation was not practical due to washing out resulting in excessive hole sizes. The Brent Group sandstones came in sandstones at 2461 m. There was 160 m net sand with average 27% porosity. The sands were oil-filled down to a section of claystones, coals and minor sands at 2520 m. An OWC was inferred at 2533 m. No shows were observed in the Statfjord sands, but the logs indicated scattered residual oil.
    A total of 103.33 m core (86% recovery) was cut in nine cores in the interval 2465 to 2597 m in the Brent Group. No fluid samples were taken on wire line.
    The well was permanently abandoned on 7 November 1976 as an oil discovery.
    Testing
    Three drill stem tests were carried out.
    DST 1 tested the interval 2489.9 m in the Brent Group. This test flowed 1080 m3 oil/day through a 3/4" choke. The GOR was 93 Sm3/Sm3, the oil gravity was 37.7 °API and the gas gravity was 0.69 (air = 1).
    DST 2 and 3 both tested the interval 1780 to 1800 m in the Lista Formation. In DST 2, perforations were plugged and no fluid was produced to the surface. In DST 3, the formation produced fluid at a rate of 114 m3/day through a 1/2" choke. The fluid consisted of 70% free water, 27% emulsion, 2% bottom sediments, and 1% oil. The high water cut in this test could be a result of poor isolation of the zone due to excessively caved hole.

  • 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]
    273.00
    3070.00

  • 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
    2465.0
    2465.7
    [m ]
    2
    2474.0
    2490.3
    [m ]
    3
    2493.0
    2511.3
    [m ]
    4
    2511.3
    2526.3
    [m ]
    5
    2527.0
    2537.0
    [m ]
    6
    2537.0
    2547.9
    [m ]
    7
    2550.0
    2561.8
    [m ]
    8
    2575.0
    2591.9
    [m ]
    9
    2592.0
    2595.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    103.5
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2465-2466m
    Core photo at depth: 2474-2476m
    Core photo at depth: 2476-2479m
    Core photo at depth: 2479-2482m
    Core photo at depth: 2482-2484m
    2465-2466m
    2474-2476m
    2476-2479m
    2479-2482m
    2482-2484m
    Core photo at depth: 2484-2487m
    Core photo at depth: 2487-2490m
    Core photo at depth: 2490-2490m
    Core photo at depth: 2493-2495m
    Core photo at depth: 2495-2498m
    2484-2487m
    2487-2490m
    2490-2490m
    2493-2495m
    2495-2498m
    Core photo at depth: 2498-2501m
    Core photo at depth: 2501-2503m
    Core photo at depth: 2503-2506m
    Core photo at depth: 2506-2509m
    Core photo at depth: 2509-2511m
    2498-2501m
    2501-2503m
    2503-2506m
    2506-2509m
    2509-2511m
    Core photo at depth: 2511-2514m
    Core photo at depth: 2514-2516m
    Core photo at depth: 2516-2519m
    Core photo at depth: 2519-2522m
    Core photo at depth: 2522-2524m
    2511-2514m
    2514-2516m
    2516-2519m
    2519-2522m
    2522-2524m
    Core photo at depth: 2527-2529m
    Core photo at depth: 2529-2532m
    Core photo at depth: 2532-2535m
    Core photo at depth: 2535-2537m
    Core photo at depth: 2537-2539m
    2527-2529m
    2529-2532m
    2532-2535m
    2535-2537m
    2537-2539m
    Core photo at depth: 2539-2542m
    Core photo at depth: 2542-2545m
    Core photo at depth: 2545-2547m
    Core photo at depth: 2547-2548m
    Core photo at depth: 2550-2552m
    2539-2542m
    2542-2545m
    2545-2547m
    2547-2548m
    2550-2552m
    Core photo at depth: 2552-2555m
    Core photo at depth: 2555-2558m
    Core photo at depth: 2558-2560m
    Core photo at depth: 2560-2561m
    Core photo at depth: 2575-2577m
    2552-2555m
    2555-2558m
    2558-2560m
    2560-2561m
    2575-2577m
    Core photo at depth: 2577-2580m
    Core photo at depth: 2583-2585m
    Core photo at depth: 2585-2588m
    Core photo at depth: 2588-2591m
    Core photo at depth: 2591-2592m
    2577-2580m
    2583-2585m
    2585-2588m
    2588-2591m
    2591-2592m
    Core photo at depth: 2592-2594m
    Core photo at depth: 2594-2595m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    2592-2594m
    2594-2595m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1312.0
    [m]
    DC
    RRI
    1336.0
    [m]
    DC
    RRI
    1360.0
    [m]
    DC
    RRI
    1378.0
    [m]
    DC
    RRI
    1396.0
    [m]
    DC
    RRI
    1408.0
    [m]
    DC
    RRI
    1450.0
    [m]
    DC
    RRI
    1474.0
    [m]
    DC
    RRI
    1490.0
    [m]
    DC
    RRI
    1508.0
    [m]
    DC
    RRI
    1526.0
    [m]
    DC
    RRI
    1544.0
    [m]
    DC
    RRI
    1562.0
    [m]
    DC
    RRI
    1580.0
    [m]
    DC
    RRI
    2452.0
    [m]
    DC
    UOS
    2455.0
    [m]
    DC
    UOS
    2458.0
    [m]
    DC
    UOS
    2461.0
    [m]
    DC
    UOS
    2464.0
    [m]
    DC
    UOS

  • 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
    2.34
    pdf
    5.42

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2490
    2493
    19.0
    2.0
    1780
    1800
    0.0
    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
    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
    1079
    100808
    0.836
    2.0

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL
    1250
    3050
    CDM
    1828
    3126
    DLL MSFL
    2400
    3125
    FDC CNL
    1520
    1851
    ISF SON
    239
    3123
    SRS
    293
    3126

  • 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
    268.0
    36
    273.0
    0.00
    SURF.COND.
    20
    490.0
    26
    500.0
    0.00
    INTERM.
    13 3/6
    1830.0
    17 1/2
    1850.0
    0.00
    INTERM.
    9 5/8
    3095.0
    12 1/2
    3127.0
    0.00