Factpages Norwegian petroleum directorate
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25/11-14 S

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  • General information

    General information
    Attribute Value
    Wellbore name
    Official name of wellbore based on NPD guidelines for designation of wells and wellbores.
    25/11-14 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).
    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 NPD.
    INJECTING: It was injected to the wellbore at the time of the operators last monthly report to the NPD.
    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.
    SUSPENDED
    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 NPD guidelines for designation of wells and wellbores.
    25/11-14
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    B88S - 320 SP. 541
    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 NPD.
    648-L
    Drilling facility
    NPD's name of the facility which the wellbore was drilled from.
    Drilling days
    Number of days from spud to completed. The first and last days of the operation is included in the count. Days where the drilling operations has been suspende, is not included. Days used for predrilling is not included. These are made available where applicable.
    31
    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,
    13.09.1990
    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.
    13.10.1990
    Plugged date
    Date when plugging operations was finished, as reported by the operator to the NPD through DDRS (Daily Drilling Reporting System).
    13.10.1990
    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.
    13.10.1992
    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.
    17.06.2011
    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 telles if the wellbore made a new discovery. Legal values: YES, NO.
    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 NPD 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 NPD bulletins.
    HEIMDAL FM
    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.
    127.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2108.0
    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).
    1801.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    44.4
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    85
    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.
    PALEOCENE
    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.
    HEIMDAL FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    59° 11' 17.31'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 22' 11.64'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6561323.70
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    463995.53
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    31
    NPDID wellbore
    NPD's unique id for the wellbore.
    1672
  • Wellbore history

    General
    Well 25/11-14 S was drilled centrally on the Balder Field on the Utsira High in the North Sea. This field was discovered in 1967 by the 25/11-1 well, and was the first well on the Norwegian shelf that proved oil. Well 25/11-14 S was planned to be completed for a long term test by the FPV Petrojarl 1. The well was planned deviated in order to avoid possible shallow gas at 235 m, 254 m, and 515 m. The main objective of this well was to test two Paleocene Heimdal Formation sands; the IB4 sand at 1863 m and the IB3 sand at 1897 m. The Heimdal Formation had previously proved oil-bearing in the three neighbouring wells 25/11-6, -7, and -8. Eocene sands constituted a secondary objective for testing. Based on data from surrounding wells, no abnormal pressure was expected. The surface location and well trajectory for this well, was designed so that a later plug-back and sidetrack to a horizontal completion could be accomplished.
    Operations and results
    Appraisal well 25/11-14 S was spudded with the semi-submersible installation Byford Dolphin on 13 September 1990. During setting of the 30" casing a fatal accident occurred as one of the roughnecks was hit by the rig tongs and perished on the drilling floor. A 9 7/8" pilot was drilled with MWD from 189 m to check possible shallow gas. Sands were detected, but they contained salt water only. The planned deviation was initiated at 950 m. While POOH for coring the Heimdal Formation sand, the pipe became stuck (packed off by sloughing shales) and the well bore abandoned at a TD of 1908 m (1749 m TVD), 5 m into the target Heimdal Formation. The well was drilled with seawater down to 452 m and with KCl/polymer/gel mud from 452 m to TD.
    The secondary target Eocene sands were not present. The IB3 sand came in at 1903 m (1746 m TVD RKB), but no wire line logs were run and no test performed due to stuck pipe. Strong shows in mud and cuttings were observed when entering the formation.
    Five cores were cut in the prognosed IB4 sand in the interval 1859 to 1886 m. The cores recovered predominantly claystone with only thin stringers of sandstone, proving that the IB4 sand was in fact not present in the well. The sandstone stringers had good oil shows.
    Since the well did not fulfil its main objective it was decided to make a sidetrack. The well bore below the 13 3/8" casing shoe was thus plugged back and abandoned on 13 October 1990 and a sidetrack (classified as a re-entry) was prepared.
    Testing
    No drill stem test was performed
  • Cuttings at the NPD

    Cuttings at the NPD
    Cuttings available for sampling?
    YES
    Cuttings at the NPD
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    480.00
    2080.00
  • Cores at the NPD

    Cores at the NPD
    Core sample number
    Core sample - top depth
    Core sample - bottom depth
    Core sample depth - uom
    1
    1862.0
    1864.0
    [m ]
    2
    1864.0
    1868.0
    [m ]
    3
    1868.0
    1876.5
    [m ]
    4
    1876.5
    1883.0
    [m ]
    5
    1883.3
    1883.8
    [m ]
    Cores at the NPD
    Total core sample length [m]
    21.8
    Cores at the NPD
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    2010-2014m
    2014-2018m
    2018-2020m
    2020-2024m
    2024-2028m
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    2028-2032m
    2032-2036m
    2036-2037m
    2038-2042m
    2042-2045m
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    2046-2049m
    2050-2054m
    2054-2058m
    2058-2062m
    2062-2064m
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    Wellbore
    2064-2068m
    2068-2070m
    1882-1883m
  • Oil samples at the NPD

    Oil samples at the NPD
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    TEST1
    1992.20
    2015.20
    23.11.1990 - 21:45
    YES
  • 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
    1.14
    pdf
    25.91
    pdf
    39.30
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MWD
    187
    1908
  • 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
    187.0
    36
    190.0
    0.00
    LOT
    INTERM.
    20
    452.0
    26
    454.0
    1.72
    LOT
    INTERM.
    13 3/8
    1564.0
    17 1/2
    1570.0
    1.73
    LOT
    INTERM.
    9 5/8
    2068.0
    12 1/4
    2070.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    744
    1.16
    18.0
    8.6
    WATER BASED
    27.09.1990
    950
    1.18
    18.0
    7.2
    WATER BASED
    28.09.1990
    1196
    1.16
    15.0
    6.7
    WATER BASED
    01.10.1990
    1254
    1.18
    18.0
    10.5
    WATER BASED
    01.10.1990
    1433
    1.16
    19.0
    8.1
    WATER BASED
    01.10.1990
    1572
    1.50
    20.0
    9.6
    WATER BASED
    22.10.1990
    1576
    1.18
    17.0
    8.1
    WATER BASED
    03.10.1990
    1576
    1.18
    18.0
    9.1
    WATER BASED
    04.10.1990
    1576
    1.16
    18.0
    9.6
    WATER BASED
    02.10.1990
    1576
    1.16
    18.0
    9.6
    WATER BASED
    02.01.1991
    1640
    1.20
    16.0
    9.6
    WATER BASED
    05.10.1990
    1795
    1.50
    25.0
    14.4
    WATER BASED
    22.10.1990
    1859
    1.26
    24.0
    13.9
    WATER BASED
    08.10.1990
    1869
    1.26
    20.0
    13.4
    WATER BASED
    08.10.1990
    1881
    1.26
    23.0
    14.4
    WATER BASED
    08.10.1990
    1886
    1.26
    21.0
    13.9
    WATER BASED
    09.10.1990
    1908
    1.26
    23.0
    14.8
    WATER BASED
    10.10.1990
    1908
    1.26
    21.0
    13.8
    WATER BASED
    11.10.1990
    1908
    1.26
    17.0
    11.9
    WATER BASED
    12.10.1990
    1908
    1.26
    20.0
    12.0
    WATER BASED
    15.10.1990
    1908
    1.26
    20.0
    12.0
    WATER BASED
    15.10.1990
    1908
    1.26
    17.0
    9.6
    WATER BASED
    15.10.1990
    1908
    1.26
    19.0
    10.5
    WATER BASED
    18.10.1990
    1908
    1.26
    19.0
    10.5
    WATER BASED
    18.10.1990
    1908
    1.26
    19.0
    10.5
    WATER BASED
    16.10.1990
    1908
    1.26
    19.0
    10.5
    WATER BASED
    22.10.1990
    1913
    1.50
    26.0
    13.0
    WATER BASED
    22.10.1990
    2002
    1.50
    28.0
    13.9
    WATER BASED
    23.10.1990
    2010
    1.50
    25.0
    13.4
    WATER BASED
    24.10.1990
    2010
    1.50
    27.0
    14.4
    WATER BASED
    25.10.1990
    2027
    1.50
    26.0
    13.4
    WATER BASED
    26.10.1990
    2035
    1.50
    27.0
    14.8
    WATER BASED
    29.10.1990
    2065
    1.07
    WATER BASED
    12.11.1990
    2065
    1.08
    WATER BASED
    12.11.1990
    2066
    1.07
    WATER BASED
    12.11.1990
    2066
    1.14
    WATER BASED
    13.11.1990
    2066
    1.12
    WATER BASED
    14.11.1990
    2066
    1.12
    WATER BASED
    19.11.1990
    2066
    1.12
    WATER BASED
    19.11.1990
    2066
    1.12
    WATER BASED
    20.11.1990
    2066
    1.12
    WATER BASED
    22.11.1990
    2066
    1.12
    WATER BASED
    23.11.1990
    2066
    1.12
    WATER BASED
    26.11.1990
    2066
    1.12
    WATER BASED
    26.11.1990
    2066
    1.12
    WATER BASED
    26.11.1990
    2066
    1.12
    WATER BASED
    27.11.1990
    2066
    1.06
    WATER BASED
    28.11.1990
    2066
    1.06
    WATER BASED
    29.11.1990
    2066
    1.06
    WATER BASED
    03.12.1990
    2066
    1.06
    WATER BASED
    03.12.1990
    2066
    1.06
    WATER BASED
    04.12.1990
    2066
    1.06
    WATER BASED
    10.12.1990
    2066
    1.04
    WATER BASED
    10.12.1990
    2066
    1.04
    WATER BASED
    10.12.1990
    2066
    1.04
    WATER BASED
    12.12.1990
    2066
    1.04
    WATER BASED
    14.12.1990
    2066
    1.05
    WATER BASED
    17.12.1990
    2066
    1.05
    WATER BASED
    17.12.1990
    2066
    1.05
    WATER BASED
    18.12.1990
    2066
    1.05
    WATER BASED
    19.12.1990
    2066
    1.05
    WATER BASED
    21.12.1990
    2066
    1.04
    WATER BASED
    27.12.1990
    2066
    1.04
    WATER BASED
    27.12.1990
    2066
    1.04
    WATER BASED
    27.12.1990
    2066
    1.04
    WATER BASED
    28.12.1990
    2066
    1.04
    WATER BASED
    28.12.1990
    2066
    1.04
    WATER BASED
    28.12.1990
    2066
    1.04
    WATER BASED
    31.12.1990
    2066
    1.04
    WATER BASED
    31.12.1990
    2066
    1.12
    WATER BASED
    15.11.1990
    2066
    1.12
    WATER BASED
    16.11.1990
    2066
    1.12
    WATER BASED
    19.11.1990
    2066
    1.12
    WATER BASED
    21.11.1990
    2066
    1.06
    WATER BASED
    30.11.1990
    2066
    1.06
    WATER BASED
    03.12.1990
    2066
    1.06
    WATER BASED
    05.12.1990
    2066
    1.04
    WATER BASED
    10.12.1990
    2066
    1.04
    WATER BASED
    12.12.1990
    2066
    1.04
    WATER BASED
    14.12.1990
    2066
    1.05
    WATER BASED
    17.12.1990
    2066
    1.05
    WATER BASED
    20.12.1990
    2066
    1.04
    WATER BASED
    27.12.1990
    2066
    1.04
    WATER BASED
    31.12.1990
    2066
    1.04
    WATER BASED
    02.01.1991
    2066
    1.04
    WATER BASED
    03.01.1991
    2066
    1.04
    WATER BASED
    04.01.1991
    2066
    1.04
    WATER BASED
    07.01.1991
    2066
    1.04
    WATER BASED
    07.01.1991
    2066
    1.04
    WATER BASED
    07.01.1991
    2070
    1.50
    27.0
    14.8
    WATER BASED
    29.10.1990
    2070
    1.50
    27.0
    14.4
    WATER BASED
    30.10.1990
    2070
    1.50
    26.0
    13.4
    WATER BASED
    31.10.1990
    2070
    1.50
    26.0
    12.0
    WATER BASED
    01.11.1990
    2081
    1.50
    26.0
    14.8
    WATER BASED
    02.11.1990
    2081
    1.50
    23.0
    14.4
    WATER BASED
    05.11.1990
    2081
    1.50
    23.0
    11.0
    WATER BASED
    05.11.1990
    2081
    1.50
    21.0
    13.4
    WATER BASED
    07.11.1990
    2081
    1.50
    19.0
    13.0
    WATER BASED
    08.11.1990
    2081
    1.50
    22.0
    13.0
    WATER BASED
    09.11.1990
    2081
    1.50
    21.0
    12.9
    WATER BASED
    05.11.1990
    2081
    1.50
    24.0
    16.7
    WATER BASED
    07.11.1990