Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.11.2024 - 09:09
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35/10-2

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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.
    35/10-2
    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
    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
    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.
    35/10-2
    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.
    843-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.
    103
    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,
    16.04.1996
    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.
    22.08.1996
    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.
    22.08.1998
    Plugged and abondon date
    Date when the P&A-operations of the wellbore was finished, as reported by the operator to the Norwegian Offshore Directorate throught DDRS (Daily Drilling Reporting System). Only applied once pr. wellhead/surface location.
    22.08.1996
    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.
    15.12.2006
    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.
    GAS
    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.
    TARBERT FM
    2nd level with HC, age
    Age of lithostratigraphic unit, 2nd level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE.
    MIDDLE JURASSIC
    2nd level with HC, formation
    Name of lithostartigraphic unit, 2nd 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.
    NESS FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    24.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    372.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4677.0
    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).
    4675.0
    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° 2' 22.67'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 2' 30.6'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6767362.83
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    502259.88
    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.
    2783

  • Wellbore history
    General
    Wildcat well 35/10-2 is located on the Flatfisk Slope approximately mid-way between the Fram and the Kvitebj ørn Discoveries in the Northern North Sea. The primary objective for the well was to explore the hydrocarbon potential of the Middle Jurassic Brent reservoir. The secondary objective was to explore the hydrocarbon potential of the Paleocene sandstones of the Goliath -prospect. Furthermore, the well would test the reservoir potential of the "intra Dunlin" (Cook Formation) and Statfjord sandstones. Planned TD was 5000 m MSL.
    Operations and results
    Well 35/10-2 was spudded with the semi-submersible installation Transocean Arctic on 16 April 1996. The original well path, 35/10-2, was drilled down to a total depth of 3301 m, where the mud motor parted. A technical sidetrack, named 35/10-2 T2 was necessary. This was kicked off at 2563 and the well was drilled down to TD for the well at 4677 m in the Early Jurassic Statfjord Formation. In the 8 3/8" section, severe problems were encountered due to mud losses. The hole was cemented back once to try and seal off the loss zones. The well was drilled with bentonite down to 1460 m, with ANCO 2000 mud from 1460 m to 3990 m, and with AncoTherm mud from 3990 m to TD
    No reservoir quality sandstones of any thickness were found in the Tertiary. The seismic anomaly thought to represent the Goliath prospect, was in fact caused by a sequence of thin siltstones and very fine sandstones at 1953-1955 m in the Sele Formation. Good oil shows were observed in this interval. The top of the Brent Group was penetrated at 4149 m, almost 90 m higher than prognosed, and the reservoir proved to hold a gas column of approximately 72 m. The well penetrated sandstones in the Early Jurassic, (Cook, Amundsen and Statfjord Formations), but no hydrocarbons were observed in these. Due to this the well was not drilled to the planned TD.
    Nine conventional cores were cut in the well. Two of these were cut from 1960 m to 1974.5 m in the Lista Formation, one was cut from 2018 m to 2023.5 m in the Lista Formation, and the remaining 6 were cut from 4154 m to 4240 m in the Brent Group. FMT samples were taken in the Ness Formation at 4217.9 m (one sample: mix of mud filtrate and formation water) and at 4199.3 m (three samples: mainly mud filtrate with 1 litre gas in one of the samples).
    The well was permanently abandoned on 22 August 1996 as a gas discovery.
    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]
    1470.00
    4677.00

  • 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
    1960.0
    1966.5
    [m ]
    2
    1966.5
    1974.0
    [m ]
    3
    2018.0
    2023.0
    [m ]
    4
    4154.0
    4162.3
    [m ]
    5
    4162.3
    4169.3
    [m ]
    6
    4169.5
    4184.6
    [m ]
    7
    4185.5
    4206.2
    [m ]
    8
    4207.0
    4223.2
    [m ]
    9
    4224.0
    4238.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    100.9
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1960-1965m
    Core photo at depth: 1965-1966m
    Core photo at depth: 1966-1971m
    Core photo at depth: 1971-1974m
    Core photo at depth: 2018-2022m
    1960-1965m
    1965-1966m
    1966-1971m
    1971-1974m
    2018-2022m
    Core photo at depth: 4145-4159m
    Core photo at depth: 4159-4162m
    Core photo at depth: 4162-4167m
    Core photo at depth: 4167-4169m
    Core photo at depth: 4169-4174m
    4145-4159m
    4159-4162m
    4162-4167m
    4167-4169m
    4169-4174m
    Core photo at depth: 4174-4179m
    Core photo at depth: 4179-4184m
    Core photo at depth: 4184-4185m
    Core photo at depth: 4185-4190m
    Core photo at depth: 4190-4195m
    4174-4179m
    4179-4184m
    4184-4185m
    4185-4190m
    4190-4195m
    Core photo at depth: 4195-4200m
    Core photo at depth: 4200-4205m
    Core photo at depth: 4205-4206m
    Core photo at depth: 4207-4212m
    Core photo at depth: 4212-4217m
    4195-4200m
    4200-4205m
    4205-4206m
    4207-4212m
    4212-4217m
    Core photo at depth: 4217-4222m
    Core photo at depth: 4222-4223m
    Core photo at depth: 4224-4229m
    Core photo at depth: 4229-4234m
    Core photo at depth: 4234-4238m
    4217-4222m
    4222-4223m
    4224-4229m
    4229-4234m
    4234-4238m

  • 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
    482.0
    36
    484.0
    0.00
    LOT
    SURF.COND.
    20
    1452.0
    26
    1455.0
    1.69
    LOT
    INTERM.
    13 3/8
    3437.0
    17 1/2
    3438.0
    1.86
    LOT
    INTERM.
    9 7/8
    3978.0
    12 1/4
    3978.0
    2.04
    LOT
    OPEN HOLE
    4677.0
    8 3/8
    4677.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    DIPL MAC GR
    3602
    4501
    DLL MAC CNL ZDL SL
    1452
    3450
    DLL ZDL GR
    3437
    3990
    DPIL MAC GR
    4236
    4663
    FMT QDYNE GR
    2015
    2016
    FMT QDYNE GR
    4148
    4154
    FMT QDYNE GR
    4150
    4473
    FMT QDYNE GR
    4150
    4473
    FMT QDYNE GR
    4199
    0
    FMT QDYNE GR
    4199
    0
    FMT QDYNE GR PT
    4157
    4636
    FMT QDYNE GR PT
    4395
    4663
    MAC GR
    3375
    3990
    MDT GR
    4395
    4485
    MWD - DPR
    483
    4579
    SWC GR
    1950
    2034
    SWC GR
    3474
    3821
    SWC GR
    3823
    3985
    SWC GR
    3985
    4322
    SWC GR
    3989
    4632
    SWC GR
    4317
    4672
    VSP GR
    640
    3440
    VSP GR
    3320
    4420
    ZDL CNL GR
    3925
    4501
    ZDL CNL GR
    4465
    4677

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    3.29

  • 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
    26.32

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    483
    1.03
    DUMMY
    1050
    1.03
    DUMMY
    1439
    1.03
    DUMMY
    1752
    1.45
    ANCO 2000
    2018
    1.47
    20.0
    ANCO 2000
    2156
    1.47
    20.0
    ANCO 2000
    2581
    1.49
    30.0
    ANCO 2000
    2773
    1.49
    36.0
    ANCO 2000
    3026
    1.49
    28.0
    ANCO 2000
    3201
    1.49
    29.0
    ANCO 2000
    3301
    1.47
    21.0
    ANCO 2000
    3301
    1.47
    30.0
    ANCO 2000
    3450
    1.51
    32.0
    ANCO 2000
    3450
    1.51
    32.0
    ANCO 2000
    3958
    1.70
    36.0
    ANCO 2000
    3990
    1.81
    43.0
    ANCO 2000
    4097
    1.89
    33.0
    ANCO 2000
    4142
    1.84
    26.0
    ANCO 2000
    4149
    1.81
    28.0
    ANCO 2000
    4154
    1.84
    22.0
    ANCO 2000
    4233
    1.84
    25.0
    ANCO 2000
    4505
    1.84
    28.0
    ANCO 2000
    4538
    1.81
    25.0
    ANCO 2000
    4677
    1.81
    19.0
    ANCOTEMP/BENT.

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1470.0
    [m]
    DC
    GEOCH
    1490.0
    [m]
    DC
    GEOCH
    1510.0
    [m]
    DC
    GEOCH
    1530.0
    [m]
    DC
    GEOCH
    1550.0
    [m]
    DC
    GEOCH
    1570.0
    [m]
    DC
    GEOCH
    1590.0
    [m]
    DC
    GEOCH
    1610.0
    [m]
    DC
    GEOCH
    1630.0
    [m]
    DC
    GEOCH
    1650.0
    [m]
    DC
    GEOCH
    1670.0
    [m]
    DC
    GEOCH
    1690.0
    [m]
    DC
    GEOCH
    1710.0
    [m]
    DC
    GEOCH
    1730.0
    [m]
    DC
    GEOCH
    1750.0
    [m]
    DC
    GEOCH
    1770.0
    [m]
    DC
    GEOCH
    1780.0
    [m]
    DC
    GEOCH
    1794.0
    [m]
    DC
    GEOCH
    1806.0
    [m]
    DC
    GEOCH
    1821.0
    [m]
    DC
    GEOCH
    1836.0
    [m]
    DC
    GEOCH
    1845.0
    [m]
    DC
    GEOCH
    1860.0
    [m]
    DC
    GEOCH
    1875.0
    [m]
    DC
    GEOCH
    1887.0
    [m]
    DC
    GEOCH
    1896.0
    [m]
    DC
    GEOCH
    1905.0
    [m]
    DC
    GEOCH
    1914.0
    [m]
    DC
    GEOCH
    1923.0
    [m]
    DC
    GEOCH
    1932.0
    [m]
    DC
    GEOCH
    1941.0
    [m]
    DC
    GEOCH
    1950.0
    [m]
    DC
    GEOCH
    1959.0
    [m]
    DC
    GEOCH
    1968.0
    [m]
    DC
    GEOCH
    1977.0
    [m]
    DC
    GEOCH
    1986.0
    [m]
    DC
    GEOCH
    1995.0
    [m]
    DC
    GEOCH
    2004.0
    [m]
    DC
    GEOCH
    2013.0
    [m]
    DC
    GEOCH
    2025.0
    [m]
    DC
    GEOCH
    2034.0
    [m]
    DC
    GEOCH
    2043.0
    [m]
    DC
    GEOCH
    2052.0
    [m]
    DC
    GEOCH
    2064.0
    [m]
    DC
    GEOCH
    2073.0
    [m]
    DC
    GEOCH
    2082.0
    [m]
    DC
    GEOCH
    2091.0
    [m]
    DC
    GEOCH
    2100.0
    [m]
    DC
    GEOCH
    2115.0
    [m]
    DC
    GEOCH
    2130.0
    [m]
    DC
    GEOCH
    2150.0
    [m]
    DC
    GEOCH
    2170.0
    [m]
    DC
    GEOCH
    2190.0
    [m]
    DC
    GEOCH
    2210.0
    [m]
    DC
    GEOCH
    2230.0
    [m]
    DC
    GEOCH
    2250.0
    [m]
    DC
    GEOCH
    2270.0
    [m]
    DC
    GEOCH
    2290.0
    [m]
    DC
    GEOCH
    2310.0
    [m]
    DC
    GEOCH
    2330.0
    [m]
    DC
    GEOCH
    2350.0
    [m]
    DC
    GEOCH
    2370.0
    [m]
    DC
    GEOCH
    2390.0
    [m]
    DC
    GEOCH
    2410.0
    [m]
    DC
    GEOCH
    2430.0
    [m]
    DC
    GEOCH
    2450.0
    [m]
    DC
    GEOCH
    2470.0
    [m]
    DC
    GEOCH
    2490.0
    [m]
    DC
    GEOCH
    2510.0
    [m]
    DC
    GEOCH
    2530.0
    [m]
    DC
    GEOCH
    2550.0
    [m]
    DC
    GEOCH
    2570.0
    [m]
    DC
    GEOCH
    2590.0
    [m]
    DC
    GEOCH
    2610.0
    [m]
    DC
    GEOCH
    2630.0
    [m]
    DC
    GEOCH
    2650.0
    [m]
    DC
    GEOCH
    2670.0
    [m]
    DC
    GEOCH
    2690.0
    [m]
    DC
    GEOCH

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    4235.70
    [m ]
    4227.50
    [m ]
    4225.25
    [m ]
    4220.76
    [m ]
    4216.35
    [m ]
    4207.85
    [m ]
    4179.87
    [m ]
    4164.74
    [m ]
    4157.80
    [m ]
    4156.20
    [m ]