Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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sodir.no          Norsk
26.11.2024 - 01:27
Time of last synchronization with Norwegian Offshore Directorate's internal systems

7/11-6

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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.
    7/11-6
    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
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    7/11-6
    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.
    Norsk Hydro Produksjon AS
    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.
    342-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.
    73
    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,
    09.08.1982
    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.
    20.10.1982
    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.
    20.10.1984
    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.
    15.02.2006
    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.
    WILDCAT
    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.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    71.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4500.0
    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).
    4500.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    8.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    148
    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.
    SMITH BANK FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    57° 6' 59.45'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 36' 55.16'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6330563.56
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    476703.64
    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.
    86

  • Wellbore history
    General
    Well 7/11-6 is located approximately half way between the Mime and the Ula Fields in the North Sea. The primary objective of well 7/11-6 was to test Late Jurassic sandstones. The secondary objective of the well was to test sandstones of Triassic age. The well was planned to reach total depth at 4400 +/- 200 m, approximately 100 m in to the Triassic.
    Operations and results
    Wildcat well 7/11-6 was spudded with the semi-submersible installation Treasure Seeker on 9 August 1982 and drilled to TD at 4500 m in the Triassic Smith Bank Formation. The well was drilled without incident except some problems with gumbo in the 17 1/2" section. The well was drilled with seawater and high viscosity pills of pre-hydrated bentonite/lime mud down to 670 m, with KCl/Drispac mud from 670 m to 2060 m, with KCl/Drispac mud converting to gel/lignosulphonate mud in the 2060 m to 3970 m section, and with a lignosulphonate mud from 3970 m to TD.
    The well encountered a Late Jurassic Ula Formation gross sand interval of 47 m between 4098 and 4145 m. Based on wire line log evaluation net sand was 21.25 m with an average porosity of 15.8%. The Ula Formation rests unconformable on the Triassic Smith Bank Formation, which consists of interbedded sandstones and shales with local siltstones and rare stringers of limestone. Both the Jurassic and Triassic sandstones proved water bearing, but with residual hydrocarbons in the Ula Formation, based on logs. Shows were reported in the interval 4007.5 m to 4038 m in the Late Jurassic hot shale unit, in the Ula Formation, and some meters into the Triassic.
    Four cores were taken in the 8 3/8" section. Cores 1 to 3 were cut mainly in the Ula Formation. The lower part of core 3 and all of core 4 were cut in the Triassic Smith Bank Formation. Thirteen RFT pressure tests were attempted in the well over the interval of 4106 to 4204.5 m. From the pressure tests a water gradient of 0.44 psi/ft (1.014 gm/cc) was calculated. A fluid sample was attempted at 4117.5 m, but failed.
    The well was permanently abandoned on 20 October 1982 as a dry well with shows
    Testing
    No drill stem test was performed in the well.

  • 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]
    190.00
    4500.00

  • 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
    4100.0
    4117.7
    [m ]
    2
    4118.0
    4131.1
    [m ]
    3
    4131.1
    4149.4
    [m ]
    4
    4149.4
    4157.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    57.5
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 4101-4105m
    Core photo at depth: 4105-4109m
    Core photo at depth: 4111-4115m
    Core photo at depth: 4116-4117m
    Core photo at depth: 4119-4123m
    4101-4105m
    4105-4109m
    4111-4115m
    4116-4117m
    4119-4123m
    Core photo at depth: 4124-4128m
    Core photo at depth: 4129-4131m
    Core photo at depth: 4132-4136m
    Core photo at depth: 4137-4141m
    Core photo at depth: 4142-4146m
    4124-4128m
    4129-4131m
    4132-4136m
    4137-4141m
    4142-4146m
    Core photo at depth: 4147-4149m
    Core photo at depth: 4150-4154m
    Core photo at depth: 4155-4157m
    Core photo at depth:  
    Core photo at depth:  
    4147-4149m
    4150-4154m
    4155-4157m

  • 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
    182.0
    36
    182.5
    0.00
    LOT
    SURF.COND.
    20
    654.0
    26
    670.0
    1.92
    LOT
    INTERM.
    13 3/8
    2044.0
    17 1/2
    2060.0
    1.85
    LOT
    INTERM.
    9 5/8
    3955.0
    12 1/4
    3970.0
    2.03
    LOT
    OPEN HOLE
    4500.0
    8 3/8
    4500.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST
    2061
    3972
    CST
    4002
    4491
    CST
    4002
    4379
    HDT
    2042
    4491
    ISF LSS GR SP
    96
    4224
    ISF MSFL LSS GR SP
    4090
    4497
    LDT CNL GR
    2042
    4498
    LDT GR
    652
    2058
    RFT
    4106
    4204
    SEISLOOK
    1000
    4490
    TEMP
    1200
    1995
    VELOCITY
    1000
    4490

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.79

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.42
    pdf
    2.22

  • 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
    10.64
    pdf
    2.78

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    200
    1.12
    waterbased
    650
    1.15
    waterbased
    1220
    1.25
    44.0
    waterbased
    1650
    1.46
    51.0
    waterbased
    2070
    1.50
    48.0
    waterbased
    3640
    1.56
    38.0
    waterbased
    4170
    1.60
    45.0
    waterbased
    4500
    1.60
    48.0
    waterbased

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    3922.5
    [m]
    SWC
    RRI
    3936.0
    [m]
    SWC
    RRI
    3946.0
    [m]
    SWC
    RRI
    3952.0
    [m]
    SWC
    RRI
    3960.5
    [m]
    SWC
    RRI
    3967.0
    [m]
    SWC
    RRI
    3973.0
    [m]
    SWC
    RRI
    4030.0
    [m]
    SWC
    RRI
    4060.0
    [m]
    SWC
    RRI
    4065.0
    [m]
    SWC
    RRI
    4085.0
    [m]
    SWC
    RRI
    4090.0
    [m]
    SWC
    RRI
    4095.0
    [m]
    SWC
    RRI
    4100.5
    [m]
    C
    HYDRO
    4104.5
    [m]
    C
    HYDRO
    4107.9
    [m]
    C
    RRI
    4109.5
    [m]
    C
    HYDRO
    4112.5
    [m]
    SWC
    HYDRO
    4113.6
    [m]
    C
    HYDRO
    4114.8
    [m]
    C
    RRI
    4115.7
    [m]
    C
    HYDRO
    4118.8
    [m]
    C
    HYDRO
    4121.3
    [m]
    C
    HYDRO
    4124.0
    [m]
    C
    HYDRO
    4126.5
    [m]
    C
    HYDRO
    4127.8
    [m]
    C
    HYDRO
    4128.2
    [m]
    C
    HYDRO
    4128.7
    [m]
    C
    HYDRO
    4130.0
    [m]
    C
    HYDRO
    4131.7
    [m]
    C
    HYDRO
    4134.3
    [m]
    C
    HYDRO
    4134.7
    [m]
    C
    HYDRO
    4136.1
    [m]
    C
    HYDRO
    4136.7
    [m]
    C
    HYDRO
    4137.5
    [m]
    C
    HYDRO
    4141.8
    [m]
    C
    HYDRO
    4142.7
    [m]
    C
    HYDRO
    4144.9
    [m]
    SWC
    RRI
    4145.0
    [m]
    C
    HYDRO
    4150.6
    [m]
    C
    HYDRO
    4152.8
    [m]
    C
    HYDRO
    4223.5
    [m]
    SWC
    RRI
    4261.8
    [m]
    SWC
    RRI
    4281.5
    [m]
    SWC
    RRI
    4290.0
    [m]
    SWC
    RRI
    4299.0
    [m]
    SWC
    RRI
    4313.8
    [m]
    SWC
    RRI
    4325.5
    [m]
    SWC
    RRI
    4338.7
    [m]
    SWC
    RRI
    4352.0
    [m]
    SWC
    RRI
    4379.5
    [m]
    SWC
    RRI