Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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12.12.2024 - 12:18
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16/1-34 S

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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.
    16/1-34 S
    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
    Press release
    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.
    16/1-34
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    PGS19M05VIK: inline 36270. Xline 129478
    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 Energy 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.
    1861-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.
    25
    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,
    07.07.2021
    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.
    31.07.2021
    Plugged date
    Date when plugging operations was finished, as reported by the operator to the Norwegian Offshore Directorate through DDRS (Daily Drilling Reporting System).
    31.07.2021
    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.
    31.07.2023
    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.
    12.09.2023
    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
    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.
    OIL
    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.
    PALEOCENE
    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.
    HEIMDAL 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.
    PALEOCENE
    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.
    GRID FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    30.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    112.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2383.0
    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).
    2125.7
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    40.5
    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.
    LATE 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.
    RAUDE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    58° 58' 51.4'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 18' 48.55'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6538283.49
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    460534.88
    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.
    9326
  • Wellbore history

    General
    Well 16/1-34 S is located on the Utsira High, north of the Edvard Grieg Field in the North Sea. It was drilled to appraise the oil-leg in the 16/1-6 S Heimdal Formation Verdandi discovery. Grid Formation injectite sandstones and expected clastic formations of Jurassic age (Garun lead) were secondary targets.
    Operations and results
    Wildcat well 16/1-34 S was spudded with the semi-submersible installation Deepsea Stavanger on 7 July 2021 and drilled to TD at 2383 m (2125.7 m TVD) m in the Late Triassic Raude Formation. The well was drilled S-shaped with a vertical section down to 543 m, up to ca 40 deviation at most, then dropping to 21 deviation in the bottom section. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 543 m, with Rheguard Prime oil-based mud from 543 m to 2016 m and with Glydril Plus mud from 2016 m to TD.
    In the Heimdal Formation, wellbore 16/1-34 S encountered an oil column of approximately 7 m in good quality reservoir sandstone with a total thickness of 50 m. The oil-water contact was found at 2090.2 m (1850.5 m TVD). Fluid sampling showed good quality oil. However, pressure data in the following 16/1-34 A sidetrack encountered Heimdal in a different pressure segment to the Verdandi gas discovery and consequently the 16/1-34 S oil discovery is considered to represent a separate accumulation which is not in direct contact with the Verdandi gas accumulation. This is referred to as the Lillefix discovery. The Grid Member consists of two sandstone intervals. The upper sandstone is about 8 m thick and is filled with hydrocarbons. The fluid gradient in this sandstone could not be established. The lower sandstone is about 70 m thick and is water filled. No permeable sandstone layers were encountered in the Jurassic Garun lead. There were oil shows in the Grid and Heimdal formations, else no oil shows are described in the well.
    Three cores were cut in succession in the Heimdal Formation from 2085.5 to 2135.0 m with recoveries between 91.6 and 98.9 %. ORA fluid samples were taken at 2083.86 m (oil/water), 2089.35 m (oil/water), and 2090.88 m (water)
    The well was permanently abandoned on 31 July 2021 as an oil 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]
    550.00
    2382.00
  • 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
    2085.5
    2095.1
    [m ]
    2
    2096.0
    2125.5
    [m ]
    3
    2126.0
    2134.9
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    48.0
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Lithostratigraphy

  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    ADT HRLA PEX HNGS
    2017
    2083
    CMR NEXT ADT
    2017
    2106
    FMIHD PPC MSIP GR
    2017
    2084
    LWD - ARC9 TELE900
    209
    522
    LWD - PDOR RAB8 ARC8 SS8 TST825
    1526
    2015
    LWD - PDORBIT ARC9 TELE900 SONS8
    538
    1519
    LWD - PDORBIT DV6MT T675 SS5
    2017
    2375
    LWD - TELE900
    141
    194
    ORA
    2083
    3095
    XPT ADT HRLA PEX HNGS
    2017
    2114
  • 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
    209.0
    36
    209.0
    0.00
    INTERM.
    20
    537.0
    24
    543.0
    1.74
    FIT
    INTERM.
    13 3/8
    1526.0
    16
    1531.0
    1.99
    LOT
    LINER
    9 5/8
    2015.0
    12 1/4
    2016.0
    1.75
    LOT
    OPEN HOLE
    2364.0
    8 1/2
    2364.0
    0.00
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    190
    1.05
    1.0
    1.0
    Bentonite Spud Mud
    191
    1.38
    22.0
    14.3
    KCL/Polymer mud
    545
    1.35
    22.0
    6.2
    OBM
    610
    1.39
    32.0
    6.5
    Rheguard Prime
    1902
    1.40
    31.0
    9.5
    OBM
    2016
    1.42
    38.0
    8.5
    OBM
    2020
    1.31
    38.0
    8.5
    Glydril
    2047
    1.38
    35.0
    8.5
    Rheguard Prime
    2086
    1.31
    16.0
    10.5
    Glydril Plus
    2384
    1.31
    22.0
    12.9
    Glydril Plus