Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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14.07.2024 - 01:28
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25/8-14 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.
    25/8-14 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
    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.
    25/8-14
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    EM01-01-x-line 2764 & inline 1806
    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.
    Esso Exploration and Production Norway 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.
    1067-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.
    33
    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,
    21.08.2003
    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.
    22.09.2003
    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.
    22.09.2005
    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.
    03.10.2013
    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
    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.
    EARLY 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.
    STATFJORD 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.
    128.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2825.0
    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).
    2145.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    64.8
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    79
    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.
    59° 17' 53.39'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 30' 22.03'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6573509.93
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    471869.88
    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.
    4805
  • Wellbore history

    General
    Well 25/8-14 S was drilled to test the Forseti Jurassic prospect, located East of the Ringhorne Field on the northern part of the Utsira High in the North Sea. The well was planned deviated with a deviation of about 65 degrees to avoid pipes and pipelaying activity at the sea floor.
    Operations and results
    Wildcat well 25/8-14 S was spudded with the semi-submersible installation Deepsea Trym on 21 August 2003. It was drilled to 2124 m where mud loss and drilling problems occurred. This caused the well to be plugged back and sidetracked at 1230 m in the 8 1/2" hole. The sidetrack 25/8-14 S T2 was drilled to final TD at 2825 m (2145 m TVD) in the Early Jurassic Statfjord Formation. The well was drilled with sea water and hi-vis pills down to 228 m, with sea water and bentonite sweeps from 228 m to 1051 m, and with Versavert oil based mud from 1051 m to TD.
    The Statfjord Group was encountered at 2540 m directly underlying Cretaceous chalk. Oil was found in Statfjord sandstone from 2584.1 m to the OWC at 2611.6 m (1957.5 to 1973.5 m TVD). Oil shows were described on SWC's from the oil bearing reservoir, otherwise no shows over the OBM were recorded in the well.
    No conventional cores were cut. RCI wire line fluid samples were taken at 2596.8 m.
    The well was permanently abandoned on 22 September as an oil discovery.
    Testing
    No drill stem test was performed.
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2050.0
    [m]
    DC
    RRI
    2060.0
    [m]
    DC
    FUGRO
    2100.0
    [m]
    DC
    FUGRO
    2110.0
    [m]
    DC
    RRI
    2120.0
    [m]
    DC
    FUGRO
    2180.0
    [m]
    DC
    FUGRO
    2190.0
    [m]
    DC
    RRI
    2250.0
    [m]
    DC
    RRI
    2260.0
    [m]
    DC
    FUGRO
    2300.0
    [m]
    DC
    FUGRO
    2330.0
    [m]
    DC
    RRI
    2340.0
    [m]
    DC
    FUGRO
    2370.0
    [m]
    DC
    RRI
    2400.0
    [m]
    DC
    RRI
    2504.0
    [m]
    DC
    RRI
    2512.0
    [m]
    DC
    RRI
    2520.0
    [m]
    DC
    FUGRO
    2528.0
    [m]
    DC
    RRI
    2540.0
    [m]
    DC
    RRI
    2540.0
    [m]
    DC
    FUGRO
    2542.0
    [m]
    SWC
    RRI
    2548.0
    [m]
    DC
    RRI
    2552.0
    [m]
    DC
    RRI
    2560.0
    [m]
    DC
    RRI
    2576.0
    [m]
    DC
    RRI
    2577.5
    [m]
    SWC
    RRI
    2580.0
    [m]
    DC
    FUGRO
    2581.0
    [m]
    SWC
    RRI
    2583.0
    [m]
    SWC
    RRI
    2584.0
    [m]
    DC
    RRI
    2616.0
    [m]
    DC
    RRI
    2620.0
    [m]
    DC
    RRI
    2624.0
    [m]
    DC
    RRI
    2628.0
    [m]
    DC
    RRI
    2639.0
    [m]
    SWC
    RRI
    2642.0
    [m]
    SWC
    RRI
    2644.0
    [m]
    SWC
    RRI
    2652.0
    [m]
    DC
    RRI
    2672.0
    [m]
    DC
    RRI
    2704.0
    [m]
    SWC
    RRI
    2708.5
    [m]
    SWC
    RRI
    2712.0
    [m]
    DC
    RRI
    2712.5
    [m]
    SWC
    RRI
    2728.0
    [m]
    DC
    RRI
    2733.0
    [m]
    SWC
    RRI
    2737.5
    [m]
    SWC
    RRI
    2740.0
    [m]
    DC
    RRI
    2760.0
    [m]
    DC
    RRI
    2784.0
    [m]
    DC
    RRI
    2788.0
    [m]
    DC
    RRI
    2804.0
    [m]
    DC
    RRI
    2812.0
    [m]
    DC
    RRI
    2820.0
    [m]
    DC
    FUGRO
  • Lithostratigraphy

  • 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
    7.88
    .pdf
    10.70
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MWD - GR RES DIR
    228
    1056
    MWD - GR RES DIR DEN NEU SON
    1056
    2124
    MWD - GR RES DIR DEN NEU SON
    1193
    2825
    RCI
    2585
    2715
    SWC
    2542
    2737
    VSP
    1374
    2800
  • 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
    224.0
    36
    228.0
    0.00
    LOT
    SURF.COND.
    9 5/8
    1050.0
    12 1/4
    1056.0
    0.00
    LOT
    OPEN HOLE
    2124.0
    8 1/2
    2124.0
    1.85
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    228
    0.00
    WBM
    1056
    1.03
    WBM
    1587
    1.50
    28.0
    NAF
    2124
    1.50
    30.0
    NAF
    2168
    1.47
    28.0
    NAF
    2825
    1.47
    NAF
  • Pressure plots

    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.21