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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7220/11-4 A

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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.
    7220/11-4 A
    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
    Press release
    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.
    BARENTS 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.
    7220/11-4
    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.
    Lundin Norway 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.
    1665-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.
    42
    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,
    18.07.2017
    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.
    28.08.2017
    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.
    28.08.2019
    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.
    28.08.2017
    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.
    28.08.2019
    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.
    OIL/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.
    NO
    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.
    EARLY PERMIAN
    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.
    ØRN 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.
    EARLY TRIASSIC
    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.
    UNDEFINED GP
    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.
    401.7
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2392.0
    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).
    2052.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    48.5
    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.
    CARBONIFEROUS
    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.
    FALK FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    72° 2' 27.88'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    20° 33' 7.97'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    8002536.65
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    690843.65
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    33
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    8226

  • Wellbore history
    General
    Well 7220/11-4 A is a geologic side-track to wellbore 7220/11-4 on the Alta discovery on the southern Loppa High in the Barents Sea. The primary objective was to investigate the northwards extent and hydrocarbon potential of the Ørn Formation and Permo-Triassic conglomerate encountered the main wellbore.
    Operations and results
    Appraisal well 7220/11-4 A was kicked off from 676 m in the main well bore on 18 July 2017. It was drilled with the semi-submersible installation Leiv Eiriksson to TD at 2392 m (2052 m TVD) m in the Carboniferous Falk Formation. Operations proceeded without significant problems. The well was drilled with Performadril mud with 2.8 - 3.6% glycol from kick-off to TD.
    Top reservoir was found at 2227 m (1897.3 m TVD). It consisted of Late Permian to Early Triassic conglomerates and carbonate rocks in the Ørn formation. The reservoir quality through the oil column varied, several zones were found to have very good permeability. In common with other wells drilled on the Alta structure, the well encountered oil with a gas cap in the reservoir. Pressure data showed the same hydrocarbon contacts as observed in previous wells drilled on the discovery suggesting good communication over the Alta structure. The gas-oil contact is estimated to be at 2234.7 m (1904.6 m TVD). The free-water level is estimated at 2282.2 m (1949.4 m TVD). Minor oil shows were reported at intervals throughout the Snadd Formation, predominantly associated with thin sandstone stringers or interbeds. Continuous shows are present in the dolomites below the free water level and down to TD but getting weaker with depth.
    The interval 2227.8 to 2281.54 m was cored in five cores. The three first cores had 99, 100 and 100% recoveries, respectively. Core 4 from 2276.4 to 2279.4 m had 86% recovery, while core 5 from 2279.44 to 2281.54 had 33.8% recovery. Fluid samples were taken at 2256.41 m (oil), 2266.0 m (oil), and 2302.39 m (water).
    The well was permanently abandoned on 28 August 2017 as a gas and oil appraisal.
    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]
    700.00
    2392.00

  • 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
    2227.8
    2252.8
    [m ]
    2
    2253.0
    2262.6
    [m ]
    3
    2262.6
    2276.4
    [m ]
    4
    2276.4
    2279.0
    [m ]
    5
    2279.4
    2280.2
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    51.7
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • 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
    493.0
    36
    493.0
    0.00
    SURF.COND.
    20
    657.4
    26
    664.0
    1.30
    FIT
    INTERM.
    9 5/8
    2168.0
    12 1/4
    2174.0
    1.38
    LOT
    LINER
    7
    2281.1
    8 1/2
    2281.8
    0.00
    OPEN HOLE
    2392.0
    6
    2392.0
    0.00

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    ADT HRLA
    1823
    2282
    CMR NEXT HNGS
    1823
    2280
    FMI MSIP
    426
    2283
    FMI MSIP
    2281
    2392
    MDT
    2224
    2281
    MDT
    2285
    2369
    MSCT
    2284
    2384
    MWD - GR PWD RES DIR
    2239
    2388
    MWD - GR RES AC PWD DIR
    628
    2174
    NEXT CMR PEX
    2281
    2392
    PEX UIB
    1823
    2282
    UBI PEX HRLA ADT HNGS
    2281
    2390
    USIT
    1500
    2066

  • Lithostratigraphy

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    426
    1.05
    45.0
    SWEEPS
    450
    1.03
    Other
    453
    1.50
    22.0
    KCL/Gem
    455
    1.22
    15.0
    Performadril
    471
    1.05
    45.0
    SWEEPS
    476
    1.22
    15.0
    Performadril
    493
    1.35
    15.0
    KCl/Polymer/GEM
    493
    1.50
    22.0
    KCL/Gem
    519
    1.22
    16.0
    Performadril
    531
    1.23
    16.0
    Performadril
    531
    1.22
    17.0
    Performadril
    588
    1.18
    14.0
    Performadril
    590
    1.35
    17.0
    KCl/Polymer/GEM
    620
    1.17
    9.0
    KCl/Gem/Polymer
    648
    1.39
    19.0
    KCl/Polymer/GEM
    658
    1.17
    19.0
    PerformaDril
    664
    1.17
    19.0
    Performadril
    664
    1.39
    19.0
    KCl/Polymer/GEM
    669
    1.17
    19.0
    Performadril
    1089
    1.18
    16.0
    PERFORMADRIL
    1270
    1.20
    19.0
    Performadril
    1294
    1.18
    20.0
    PERFORMADRIL
    1452
    1.17
    11.0
    KCl/Gem/Polymer
    1452
    1.14
    10.0
    KCl/Gem/Polymer
    1475
    1.20
    19.0
    Performadril
    1570
    1.21
    20.0
    Performadril
    1788
    1.14
    10.0
    KCl/Gem/Polymer
    1794
    1.20
    19.0
    Performadril
    1818
    1.21
    22.0
    PERFORMADRIL
    1830
    1.17
    17.0
    Performadril
    1904
    1.15
    16.0
    Performadril
    1904
    1.14
    16.0
    Performadril
    1929
    1.22
    19.0
    PERFORMADRIL
    1934
    1.14
    15.0
    Performadril
    2174
    1.22
    22.0
    PERFORMADRIL
    2174
    1.23
    24.0
    Performadril
    2180
    1.14
    13.0
    Performadril
    2262
    1.15
    10.0
    Performadril
    2282
    1.14
    8.0
    Performadril
    2282
    1.13
    1.0
    KCl
    2392
    1.23
    12.0
    Performadril
    2392
    1.14
    11.0
    Performadril