Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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11.11.2024 - 01:26
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33/12-7

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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.
    33/12-7
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    33/12-7
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    NOD-8-87-012& SKUDDPUNKT 170
    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.
    601-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.
    65
    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,
    22.02.1989
    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.
    27.04.1989
    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.
    27.04.1991
    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.
    30.06.2005
    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.
    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.
    DRY
    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.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    140.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3703.0
    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).
    3696.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    12.3
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    126
    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° 7' 35.72'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 54' 32.5'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6777538.47
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    441227.76
    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.
    1358

  • Wellbore history
    General
    Well 33/12-7 was designed to drill the Delta structure, a tilted fault block on the Tampen Spur, and was the only commitment well in licence 152. The primary objective was to test the hydrocarbon potential of the Brent group on the Delta structure. A secondary objective was to explore the Statfjord Formation on the same structure. The well was designed as a possible producer in case of a discovery. Shallow gas was predicted at 375 m MSL, 415 m MSL, and possibly in sand lenses on an erosion surface at 456 m MSL.
    Operations and results
    Wildcat well 33/12-7 was spudded with the semi-submersible installation Deepsea Bergen on 22 February 1989 and drilled to TD at 3703 m in Early Jurassic sediments of the Statfjord Formation. After drilling 26" section to 384 m fifteen days rig time were spent trouble shooting and repairing a leak in the BOP. Otherwise operations went without significant problems. The well was drilled with seawater and gel down to 383 m, with Newdrill/PAC/seawater from 383 m to 3034 m, and with gel/lignosulphonate from 3034 m to TD. No shallow gas was encountered in the well.
    Sands were encountered in the Tarbert, Rannoch, Cook and Statfjord Formations. No shows of hydrocarbons were recorded while drilling, except for some residuals in the Cook Formation. Post-well organic geochemical analyses established that the Draupne Formation has potential for generation of oil and gas and that the Heather Formation has potential for condensate/light oil and gas. Draupne is immature and Heather marginally mature in the well location. Tarbert and Cook Formations were analysed for migrated hydrocarbons but no significant abundance were found.
    One core was cut in the interval 3041 m to 3057.5 m. No fluid sampling was attempted.
    The well was permanently abandoned on 27 April 1989 as a dry hole.
    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]
    390.00
    3703.00

  • 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
    3035.0
    3051.5
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    16.5
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1700.0
    [m]
    DC
    STRAT
    1800.0
    [m]
    DC
    STRAT
    1830.0
    [m]
    DC
    STRAT
    1860.0
    [m]
    DC
    STRAT
    1890.0
    [m]
    DC
    STRAT
    2010.0
    [m]
    DC
    STRAT
    2020.0
    [m]
    DC
    STRAT
    2030.0
    [m]
    DC
    STRAT
    2060.0
    [m]
    DC
    STRAT
    2100.0
    [m]
    DC
    STRAT
    2140.0
    [m]
    DC
    STRAT
    2180.0
    [m]
    DC
    STRAT
    2220.0
    [m]
    DC
    STRAT
    2260.0
    [m]
    DC
    STRAT
    2300.0
    [m]
    DC
    STRAT
    2340.0
    [m]
    DC
    STRAT
    2380.0
    [m]
    DC
    STRAT
    2420.0
    [m]
    DC
    STRAT
    2460.0
    [m]
    DC
    STRAT
    2500.0
    [m]
    DC
    STRAT
    2540.0
    [m]
    DC
    STRAT
    2580.0
    [m]
    DC
    STRAT
    2620.0
    [m]
    DC
    STRAT
    2660.0
    [m]
    DC
    STRAT
    2700.0
    [m]
    DC
    STRAT
    2740.0
    [m]
    DC
    STRAT
    2780.0
    [m]
    DC
    STRAT
    2820.0
    [m]
    DC
    STRAT
    2859.0
    [m]
    DC
    STRAT
    2901.0
    [m]
    DC
    STRAT
    2916.0
    [m]
    DC
    STRAT
    2922.0
    [m]
    DC
    STRAT
    2928.0
    [m]
    DC
    STRAT
    2931.0
    [m]
    DC
    STRAT
    2946.0
    [m]
    DC
    STRAT
    2961.0
    [m]
    DC
    STRAT
    2976.0
    [m]
    DC
    STRAT
    2991.0
    [m]
    DC
    STRAT
    3006.0
    [m]
    DC
    STRAT
    3021.0
    [m]
    DC
    STRAT
    3027.0
    [m]
    DC
    STRAT
    3039.7
    [m]
    C
    STAT
    3040.3
    [m]
    C
    STAT
    3046.6
    [m]
    C
    STAT
    3050.7
    [m]
    C
    STAT
    3069.0
    [m]
    DC
    STRAT
    3081.0
    [m]
    DC
    STRAT
    3096.0
    [m]
    DC
    STRAT
    3111.0
    [m]
    DC
    STRAT
    3126.0
    [m]
    DC
    STRAT
    3141.0
    [m]
    DC
    STRAT
    3156.0
    [m]
    DC
    STRAT
    3171.0
    [m]
    DC
    STRAT
    3186.0
    [m]
    DC
    STRAT
    3201.0
    [m]
    DC
    STRAT
    3216.0
    [m]
    DC
    STRAT
    3231.0
    [m]
    DC
    STRAT
    3237.0
    [m]
    DC
    STRAT
    3246.0
    [m]
    DC
    STRAT
    3252.0
    [m]
    DC
    STRAT
    3267.0
    [m]
    DC
    STRAT
    3282.0
    [m]
    DC
    STRAT
    3288.0
    [m]
    DC
    STRAT
    3294.0
    [m]
    DC
    STRAT
    3303.0
    [m]
    DC
    STRAT
    3318.0
    [m]
    DC
    STRAT
    3333.0
    [m]
    DC
    STRAT
    3348.0
    [m]
    DC
    STRAT
    3363.0
    [m]
    DC
    STRAT
    3378.0
    [m]
    DC
    STRAT
    3389.0
    [m]
    SWC
    STAT
    3399.3
    [m]
    SWC
    STAT
    3407.0
    [m]
    SWC
    STAT
    3417.0
    [m]
    SWC
    STAT
    3427.5
    [m]
    SWC
    STAT
    3441.0
    [m]
    SWC
    STAT
    3461.0
    [m]
    SWC
    STAT
    3473.0
    [m]
    SWC
    STAT
    3484.0
    [m]
    SWC
    STAT
    3489.0
    [m]
    DC
    STRAT
    3504.0
    [m]
    DC
    STRAT
    3519.0
    [m]
    DC
    STRAT
    3525.0
    [m]
    DC
    STRAT
    3540.0
    [m]
    DC
    STRAT
    3555.0
    [m]
    DC
    STRAT
    3570.0
    [m]
    DC
    STRAT
    3585.0
    [m]
    DC
    STRAT
    3600.0
    [m]
    DC
    STRAT
    3615.0
    [m]
    DC
    STRAT
    3630.0
    [m]
    DC
    STRAT
    3645.0
    [m]
    DC
    STRAT
    3662.0
    [m]
    SWC
    STAT
    3664.0
    [m]
    SWC
    STAT
    3678.0
    [m]
    DC
    STRAT
    3693.0
    [m]
    DC
    STRAT
    3703.0
    [m]
    DC
    STRAT

  • 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
    1.70

  • 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
    23.60

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL
    160
    1600
    CBL VDL
    1400
    3018
    CDL CNL GR
    3017
    3701
    CDL GR
    364
    3036
    DIFF.TEMP
    1505
    1848
    DIFL ACL GR
    364
    3688
    DIPLOG
    3017
    3701
    FMT
    3388
    3041
    MWD - GR RES DIR
    226
    3703
    SWC GR
    3295
    3670
    VELOCITY
    1300
    3680

  • 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
    222.0
    36
    225.0
    0.00
    LOT
    INTERM.
    20
    363.0
    26
    384.0
    1.43
    LOT
    INTERM.
    13 3/8
    1610.0
    17 1/2
    1625.0
    1.76
    LOT
    INTERM.
    9 5/8
    3017.0
    12 1/4
    3034.0
    1.85
    LOT
    OPEN HOLE
    3703.0
    8 1/2
    3703.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    208
    1.05
    WATER BASED
    23.02.1989
    225
    1.05
    25.0
    23.9
    WATER BASED
    27.02.1989
    332
    1.05
    25.0
    23.9
    WATER BASED
    27.02.1989
    383
    1.05
    25.0
    23.9
    WATER BASED
    27.02.1989
    384
    1.10
    12.0
    3.8
    WATER BASED
    03.03.1989
    384
    1.10
    10.0
    3.8
    WATER BASED
    28.02.1989
    773
    1.10
    14.0
    3.8
    WATER BASED
    16.03.1989
    1218
    1.20
    16.0
    3.4
    WATER BASED
    17.03.1989
    1545
    1.20
    21.0
    3.9
    WATER BASED
    20.03.1989
    1548
    1.20
    21.0
    3.8
    WATER BASED
    20.03.1989
    1613
    1.20
    16.0
    2.4
    WATER BASED
    20.03.1989
    1625
    1.20
    16.0
    3.8
    WATER BASED
    20.03.1989
    1625
    1.20
    15.0
    3.4
    WATER BASED
    21.03.1989
    1625
    1.12
    17.0
    3.8
    WATER BASED
    22.03.1989
    1625
    1.20
    17.0
    4.3
    WATER BASED
    20.03.1989
    1625
    1.13
    12.0
    3.8
    WATER BASED
    28.03.1989
    1630
    1.27
    12.0
    3.8
    WATER BASED
    28.03.1989
    1827
    1.27
    20.0
    3.8
    WATER BASED
    28.03.1989
    2139
    1.27
    20.0
    4.5
    WATER BASED
    28.03.1989
    2388
    1.27
    19.0
    3.4
    WATER BASED
    28.03.1989
    2422
    1.27
    18.0
    3.8
    WATER BASED
    28.03.1989
    2424
    1.27
    18.0
    3.4
    WATER BASED
    28.03.1989
    2439
    1.27
    15.0
    3.8
    WATER BASED
    29.03.1989
    2511
    1.27
    18.0
    2.9
    WATER BASED
    29.03.1989
    2587
    1.27
    21.0
    3.8
    WATER BASED
    29.03.1989
    2628
    1.27
    20.0
    3.8
    WATER BASED
    30.03.1989
    2682
    1.27
    17.0
    3.4
    WATER BASED
    30.03.1989
    2730
    1.27
    20.0
    2.8
    WATER BASED
    30.03.1989
    2760
    1.27
    19.0
    2.8
    WATER BASED
    30.03.1989
    2821
    1.27
    16.0
    3.4
    WATER BASED
    31.03.1989
    2879
    1.27
    13.0
    3.9
    WATER BASED
    31.03.1989
    2904
    1.27
    13.0
    3.4
    WATER BASED
    03.04.1989
    2917
    1.28
    15.0
    3.9
    WATER BASED
    03.04.1989
    2937
    1.52
    19.0
    5.3
    WATER BASED
    03.04.1989
    2961
    1.52
    18.0
    5.7
    WATER BASED
    03.04.1989
    2976
    1.52
    18.0
    6.2
    WATER BASED
    03.04.1989
    3034
    1.52
    16.0
    5.3
    WATER BASED
    03.04.1989
    3034
    1.55
    17.0
    5.3
    WATER BASED
    06.04.1989
    3034
    1.55
    16.0
    5.3
    WATER BASED
    05.04.1989
    3034
    1.52
    17.0
    4.8
    WATER BASED
    04.04.1989
    3034
    1.55
    18.0
    4.8
    WATER BASED
    07.04.1989
    3035
    1.47
    18.0
    4.8
    WATER BASED
    10.04.1989
    3052
    1.47
    27.0
    5.3
    WATER BASED
    10.04.1989
    3054
    1.47
    25.0
    5.3
    WATER BASED
    10.04.1989
    3170
    1.47
    27.0
    6.2
    WATER BASED
    11.04.1989
    3170
    1.47
    27.0
    6.2
    WATER BASED
    11.04.1989
    3291
    1.47
    28.0
    6.2
    WATER BASED
    12.04.1989
    3315
    1.47
    28.0
    4.7
    WATER BASED
    13.04.1989
    3383
    1.47
    31.0
    4.3
    WATER BASED
    14.04.1989
    3472
    1.47
    34.0
    4.7
    WATER BASED
    17.04.1989
    3472
    1.47
    34.0
    4.7
    WATER BASED
    17.04.1989
    3472
    1.47
    34.0
    4.7
    WATER BASED
    17.04.1989
    3505
    1.47
    35.0
    3.8
    WATER BASED
    17.04.1989
    3505
    1.47
    35.0
    3.8
    WATER BASED
    17.04.1989
    3505
    1.47
    35.0
    3.8
    WATER BASED
    17.04.1989
    3583
    1.47
    33.0
    4.8
    WATER BASED
    17.04.1989
    3583
    1.47
    33.0
    4.8
    WATER BASED
    17.04.1989
    3583
    1.47
    33.0
    4.8
    WATER BASED
    17.04.1989
    3595
    1.47
    34.0
    4.8
    WATER BASED
    18.04.1989
    3628
    1.47
    33.0
    3.8
    WATER BASED
    18.04.1989
    3650
    1.47
    32.0
    5.3
    WATER BASED
    19.04.1989
    3703
    1.47
    36.0
    5.3
    WATER BASED
    20.04.1989
    3703
    1.47
    36.0
    5.3
    WATER BASED
    20.04.1989
    3703
    1.47
    36.0
    3.4
    WATER BASED
    21.04.1989
    3703
    1.47
    35.0
    4.8
    WATER BASED
    24.04.1989
    3703
    1.47
    34.0
    3.4
    WATER BASED
    19.04.1989

  • Pressure plots
    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.23