Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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25.11.2024 - 01:30
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7/7-3

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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.
    7/7-3
    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.
    7/7-3
    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.
    759-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.
    76
    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,
    20.04.1993
    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.
    04.07.1993
    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.
    04.07.1995
    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.
    19.10.2006
    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.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    82.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3584.0
    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).
    3582.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    5.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    144
    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.
    LATE PERMIAN
    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.
    ZECHSTEIN GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    57° 27' 41.61'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 16' 20.96'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6369143.60
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    456352.15
    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.
    2113

  • Wellbore history
    Well 7/7-3 is located ca 5 km east of the UK border on the Jæren High in the North Sea. It was drilled to appraise the Late Jurassic discovery in well 7/7-2 and was designed to test seismic interpretations, reservoir thickness and properties, pressure regime, and volume of recoverable oil. The well was planned as a future injector, but since the reservoir only indicated traces of hydrocarbons it was permanently plugged.
    Operations and results
    Well 7/7-3 was spudded with the semi-submersible installation Deepsea Bergen on 20 April 1993 and drilled to TD at 3584 m in the Late Permian Zechstein Group. The well took 17 days more than planned to drill, mainly due to a 8,5 days downtime related to BOP repair and loss of circulation at end of 12 1/4" section. The well was drilled with seawater and hi-vis pills down to 918 m, and with ANCO 2000 mud from 918 m to 2677 m. From 2677 m to 3354 m the mud was gradually displaced to an ANCOTHERM/Bentonite system. The ANCOTHERM/Bentonite system was used from 3354 m to TD.
    The 7/7-3 well penetrated the Ula Formation at 3490.5 m. The siltstone and the uppermost 2 metres of the sandstone showed only weak shows and the following logging and evaluation confirmed that the sandstone did not contain any moveable hydrocarbons.
    Three cores were cut from 3486 m to 3516 m, from base Farsund Formation, through the Ula Formation and into the Triassic Group. Two segregated FMT fluid samples were taken at the same depth, 3497.3 m. All fluid chambers proved to contain mud filtrate and water and did not contain any hydrocarbons.
    The well was permanently abandoned on 4 July 1993 as dry 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]
    930.00
    3584.00

  • 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
    3486.0
    3489.3
    [m ]
    2
    3489.3
    3490.0
    [m ]
    3
    3491.0
    3516.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    29.0
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 3486-3489m
    Core photo at depth: 3489-3490m
    Core photo at depth: 3491-3496m
    Core photo at depth: 3496-3501m
    Core photo at depth: 3501-3506m
    3486-3489m
    3489-3490m
    3491-3496m
    3496-3501m
    3501-3506m
    Core photo at depth: 3506-3511m
    Core photo at depth: 3511-3516m
    Core photo at depth: 3516-3516m
    Core photo at depth:  
    Core photo at depth:  
    3506-3511m
    3511-3516m
    3516-3516m

  • 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
    164.5
    36
    165.0
    0.00
    LOT
    INTERM.
    20
    903.5
    26
    905.0
    2.00
    LOT
    INTERM.
    13 3/8
    2661.0
    17 1/2
    2663.0
    1.95
    LOT
    INTERM.
    9 5/8
    3339.0
    12 1/4
    3340.0
    2.04
    LOT
    OPEN HOLE
    3584.0
    8 1/2
    3584.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    ACL GR
    2661
    3351
    CBL VDL GR
    2100
    2661
    CBL VDL GR
    2575
    3340
    COREGUN
    2268
    2667
    COREGUN
    3225
    3335
    COREGUN
    3354
    3540
    DIFL ACL MLL GR CAL
    3340
    3587
    DIFL ACL ZDL CNL GR CAL
    2661
    3351
    DIFL ACL ZDL GR CAL
    903
    2677
    DIPS GR
    3340
    3578
    FMT CHT GR
    3496
    3505
    FMT CHT GR
    3497
    0
    MWD - GR RES DIR
    172
    3584
    VSP
    510
    3547
    ZDL CNL GR
    3340
    3587

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.46

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.19

  • 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
    10.55

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    170
    1.03
    DUMMY
    22.04.1993
    651
    1.03
    DUMMY
    23.04.1993
    920
    1.03
    DUMMY
    26.04.1993
    920
    1.03
    DUMMY
    26.04.1993
    920
    1.20
    17.0
    6.5
    DUMMY
    26.04.1993
    920
    1.03
    DUMMY
    27.04.1993
    940
    1.50
    46.0
    8.0
    WATER BASED
    07.05.1993
    1350
    1.50
    51.0
    11.5
    WATER BASED
    10.05.1993
    1665
    1.50
    51.0
    10.5
    WATER BASED
    10.05.1993
    1850
    1.60
    47.0
    9.5
    WATER BASED
    10.05.1993
    1850
    1.60
    51.0
    11.5
    WATER BASED
    11.05.1993
    1982
    1.60
    47.0
    9.5
    WATER BASED
    10.05.1993
    2180
    1.60
    51.0
    11.5
    WATER BASED
    11.05.1993
    2677
    1.65
    40.0
    7.5
    WATER BASED
    18.05.1993
    2677
    1.65
    37.0
    7.0
    WATER BASED
    18.05.1993
    2677
    1.65
    39.0
    7.0
    WATER BASED
    18.05.1993
    2677
    1.65
    38.0
    7.0
    WATER BASED
    18.05.1993
    2677
    1.65
    40.0
    7.0
    WATER BASED
    19.05.1993
    2677
    1.60
    44.0
    9.0
    WATER BASED
    18.05.1993
    2677
    1.65
    37.0
    7.0
    WATER BASED
    24.05.1993
    2694
    1.65
    36.0
    7.5
    WATER BASED
    24.05.1993
    2789
    1.65
    44.0
    7.5
    WATER BASED
    24.05.1993
    2836
    1.65
    52.0
    9.0
    WATER BASED
    24.05.1993
    2894
    1.65
    46.0
    9.0
    WATER BASED
    24.05.1993
    2930
    1.65
    49.0
    8.5
    WATER BASED
    25.05.1993
    3005
    1.85
    67.0
    10.5
    WATER BASED
    02.06.1993
    3029
    1.65
    47.0
    7.0
    WATER BASED
    27.05.1993
    3054
    1.85
    50.0
    7.0
    WATER BASED
    02.06.1993
    3094
    1.73
    53.0
    8.0
    WATER BASED
    28.05.1993
    3116
    1.73
    54.0
    9.0
    WATER BASED
    28.05.1993
    3237
    1.79
    58.0
    10.5
    WATER BASED
    02.06.1993
    3354
    1.82
    51.0
    7.0
    WATER BASED
    03.06.1993
    3354
    1.82
    41.0
    4.5
    WATER BASED
    03.06.1993
    3354
    1.82
    56.0
    7.5
    WATER BASED
    07.06.1993
    3354
    1.82
    51.0
    7.5
    WATER BASED
    07.06.1993
    3354
    1.82
    41.0
    4.0
    WATER BASED
    07.06.1993
    3354
    1.82
    40.0
    4.0
    WATER BASED
    08.06.1993
    3354
    1.82
    35.0
    4.0
    WATER BASED
    09.06.1993
    3354
    1.82
    41.0
    4.0
    WATER BASED
    14.06.1993
    3354
    1.82
    26.0
    3.5
    WATER BASED
    14.06.1993
    3354
    1.82
    52.0
    7.0
    DUMMY
    15.06.1993
    3354
    1.82
    52.0
    6.0
    DUMMY
    15.06.1993
    3355
    1.85
    59.0
    12.0
    WATER BASED
    02.06.1993
    3357
    1.82
    46.0
    7.0
    DUMMY
    15.06.1993
    3377
    1.87
    47.0
    7.5
    DUMMY
    15.06.1993
    3435
    1.92
    48.0
    8.0
    DUMMY
    16.06.1993
    3486
    1.92
    42.0
    7.5
    DUMMY
    17.06.1993
    3489
    1.92
    36.0
    7.5
    DUMMY
    21.06.1993
    3504
    1.92
    33.0
    7.0
    DUMMY
    22.06.1993
    3518
    1.92
    29.0
    6.5
    DUMMY
    22.06.1993
    3584
    1.95
    29.0
    8.5
    DUMMY
    22.06.1993
    3584
    1.92
    32.0
    7.5
    DUMMY
    22.06.1993

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1500.0
    [m]
    DC
    MILL
    1520.0
    [m]
    DC
    MILL
    1540.0
    [m]
    DC
    MILL
    1560.0
    [m]
    DC
    MILL
    1580.0
    [m]
    DC
    MILL
    1600.0
    [m]
    DC
    MILL
    1620.0
    [m]
    DC
    MILL
    1640.0
    [m]
    DC
    MILL
    1660.0
    [m]
    DC
    MILL
    1680.0
    [m]
    DC
    MILL
    1700.0
    [m]
    DC
    MILL
    1720.0
    [m]
    DC
    MILL
    1740.0
    [m]
    DC
    MILL
    1760.0
    [m]
    DC
    MILL
    1780.0
    [m]
    DC
    MILL
    1800.0
    [m]
    DC
    MILL
    1820.0
    [m]
    DC
    MILL
    1840.0
    [m]
    DC
    MILL
    1860.0
    [m]
    DC
    MILL
    1880.0
    [m]
    DC
    MILL
    1900.0
    [m]
    DC
    MILL
    1920.0
    [m]
    DC
    MILL
    1940.0
    [m]
    DC
    MILL
    1960.0
    [m]
    DC
    MILL
    1980.0
    [m]
    DC
    MILL
    2000.0
    [m]
    DC
    MILL
    2020.0
    [m]
    DC
    MILL
    2040.0
    [m]
    DC
    MILL
    2055.0
    [m]
    DC
    MILL
    2070.0
    [m]
    DC
    MILL
    2090.0
    [m]
    DC
    MILL
    2110.0
    [m]
    DC
    MILL
    2140.0
    [m]
    DC
    MILL
    2150.0
    [m]
    DC
    MILL
    2170.0
    [m]
    DC
    MILL
    2190.0
    [m]
    DC
    MILL
    2205.0
    [m]
    DC
    MILL
    2220.0
    [m]
    DC
    MILL
    2235.0
    [m]
    DC
    MILL
    2250.0
    [m]
    DC
    MILL
    2268.0
    [m]
    SWC
    STATO
    2280.0
    [m]
    SWC
    STATO
    2295.0
    [m]
    DC
    MILL
    2310.0
    [m]
    DC
    MILL
    2325.0
    [m]
    DC
    MILL
    2340.0
    [m]
    DC
    MILL
    2355.0
    [m]
    DC
    MILL
    2370.0
    [m]
    DC
    MILL
    2385.0
    [m]
    DC
    MILL
    2400.0
    [m]
    DC
    MILL
    2415.0
    [m]
    DC
    MILL
    2430.0
    [m]
    DC
    MILL
    2445.0
    [m]
    DC
    MILL
    2460.0
    [m]
    DC
    MILL
    2475.0
    [m]
    DC
    MILL
    2490.0
    [m]
    DC
    MILL
    2505.0
    [m]
    DC
    MILL
    2520.0
    [m]
    DC
    MILL
    2535.0
    [m]
    DC
    MILL
    2550.0
    [m]
    DC
    MILL
    2565.0
    [m]
    DC
    MILL
    2580.0
    [m]
    DC
    MILL
    2591.0
    [m]
    SWC
    STATO
    2601.0
    [m]
    SWC
    STATO
    2615.0
    [m]
    DC
    MILL
    2630.0
    [m]
    DC
    MILL
    2646.0
    [m]
    SWC
    STATO
    2660.0
    [m]
    DC
    MILL
    2675.0
    [m]
    DC
    MILL
    2690.0
    [m]
    DC
    MILL
    2705.0
    [m]
    DC
    MILL
    2720.0
    [m]
    DC
    MILL
    2735.0
    [m]
    DC
    MILL
    2750.0
    [m]
    DC
    MILL
    2765.0
    [m]
    DC
    MILL
    2780.0
    [m]
    DC
    MILL
    2795.0
    [m]
    DC
    MILL
    2800.0
    [m]
    DC
    MILL
    2805.0
    [m]
    DC
    MILL
    2810.0
    [m]
    DC
    MILL
    3286.0
    [m]
    SWC
    STATO
    3301.0
    [m]
    SWC
    STATO
    3335.0
    [m]
    SWC
    STATO
    3350.0
    [m]
    DC
    MILL
    3370.0
    [m]
    DC
    MILL
    3385.0
    [m]
    DC
    MILL
    3400.0
    [m]
    DC
    MILL
    3412.0
    [m]
    DC
    MILL
    3413.0
    [m]
    SWC
    STATO
    3424.0
    [m]
    DC
    MILL
    3433.0
    [m]
    DC
    MILL
    3442.0
    [m]
    DC
    MILL
    3456.5
    [m]
    SWC
    STATO
    3459.0
    [m]
    SWC
    STATO
    3466.0
    [m]
    SWC
    STATO
    3471.0
    [m]
    SWC
    STATO
    3479.5
    [m]
    SWC
    STATO
    3481.5
    [m]
    SWC
    STATO
    3486.1
    [m]
    C
    STATO
    3486.2
    [m]
    C
    STATO
    3486.3
    [m]
    C
    STATO
    3488.0
    [m]
    SWC
    STATO
    3489.5
    [m]
    C
    STATO
    3495.6
    [m]
    C
    STATO
    3498.1
    [m]
    C
    STATO
    3553.0
    [m]
    DC
    MILL
    3571.0
    [m]
    DC
    MILL
    3584.0
    [m]
    DC
    MILL