Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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sodir.no          Norsk
25.11.2024 - 01:30
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25/11-16

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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.
    25/11-16
    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
    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.
    25/11-16
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    VGD 89 - 212 & SP. 106
    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.
    Norsk Hydro Produksjon 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.
    733-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.
    26
    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,
    29.06.1992
    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.
    24.07.1992
    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.
    24.07.1994
    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.
    20.06.2011
    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.
    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.
    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
    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.
    120.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    1945.0
    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).
    1945.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1.4
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    71
    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 CRETACEOUS
    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.
    HOD FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    59° 7' 6.55'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 23' 6.2'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6553559.14
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    464790.04
    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.
    1920

  • Wellbore history
    General
    Well 25/11-16 was drilled south of the Balder Field complex on the Utsira High in the North Sea. The main objective was to test the hydrocarbon potential of the Heimdal Formation within the "Hanna" mound. Possible younger sand developments in the Lista and Sele Formations were secondary targets.
    Operations and results
    Wildcat well 25/11-16 was spudded with the semi-submersible installation Vildcat Explorer on 29 June 1992 and drilled to TD at 1945 m in the Late Cretaceous Hod Formation. The well was drilled with spud mud down to 1339 m and with CaCO3/Nacl mud from 1339 m to TD.
    The primary target Heimdal Formation was encountered from 1767 m to 1872 m. Gross thickness is 105.75 m with 83.9 m net sand. The formation was oil bearing with 18.87 m net pay of heavy oil (0.85 g/cc at reservoir conditions) down to a series of claystone beds at 1786 m. The average porosity in the oil zone was 37.5% and the average Sw was 12.8%. The reservoir sand is very poorly consolidated, homogenous and has a net to gross ratio in the oil zone of 0.96. The average range of both horizontal and vertical permeabilities is 10 to 14 Darcies. A free water contact was established at 1793 m from MDT data. The oil/water contact appears to occur at the base of the sand unit at ca 1790 m (1765 m TVD MSL). In addition to oil shows in the Heimdal Formation oil zone oil two isolated shows were recorded in thin sand stringers at 1713 m in the Balder Formation and at 1735 m in the Sele Formation.
    A total of 200 m core was recovered from 14 cores taken in the interval 1699 m to 1914 m (93% recovery), starting 1 m below the top of the Balder Formation and ending 17 m into the Tor Formation. A total of 26 pressure points were recorded with the MDT tool. Fluid samples were taken at 1774 m, 1793.5 m, and 1838 m.
    The well was suspended without testing on 24 July 1992 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]
    1340.00
    1945.00

  • 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
    1699.0
    1713.0
    [m ]
    2
    1713.0
    1725.7
    [m ]
    3
    1730.0
    1740.3
    [m ]
    4
    1747.5
    1748.0
    [m ]
    5
    1748.5
    1767.0
    [m ]
    6
    1767.5
    1784.0
    [m ]
    7
    1784.5
    1786.0
    [m ]
    8
    1786.0
    1803.0
    [m ]
    9
    1803.0
    1820.7
    [m ]
    10
    1821.0
    1838.4
    [m ]
    11
    1839.0
    1854.0
    [m ]
    12
    1855.0
    1881.3
    [m ]
    13
    1882.0
    1886.0
    [m ]
    14
    1887.0
    1914.5
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    198.9
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1699-1704m
    Core photo at depth: 1704-1709m
    Core photo at depth: 1709-1713m
    Core photo at depth: 1713-1718m
    Core photo at depth: 1718-1723m
    1699-1704m
    1704-1709m
    1709-1713m
    1713-1718m
    1718-1723m
    Core photo at depth: 1723-1725m
    Core photo at depth: 1730-1735m
    Core photo at depth: 1735-1740m
    Core photo at depth: 1740-1740m
    Core photo at depth: 1747-1748m
    1723-1725m
    1730-1735m
    1735-1740m
    1740-1740m
    1747-1748m
    Core photo at depth: 1748-1753m
    Core photo at depth: 1753-1758m
    Core photo at depth: 1758-1763m
    Core photo at depth: 1763-1767m
    Core photo at depth: 1767-1772m
    1748-1753m
    1753-1758m
    1758-1763m
    1763-1767m
    1767-1772m
    Core photo at depth: 1772-1777m
    Core photo at depth: 1777-1782m
    Core photo at depth: 1782-1784m
    Core photo at depth: 1784-1786m
    Core photo at depth: 1786-1791m
    1772-1777m
    1777-1782m
    1782-1784m
    1784-1786m
    1786-1791m
    Core photo at depth: 1791-1796m
    Core photo at depth: 1796-1801m
    Core photo at depth: 1803-1808m
    Core photo at depth: 1808-1813m
    Core photo at depth: 1813-1818m
    1791-1796m
    1796-1801m
    1803-1808m
    1808-1813m
    1813-1818m
    Core photo at depth: 1818-1820m
    Core photo at depth: 1821-1826m
    Core photo at depth: 1826-1831m
    Core photo at depth: 1831-1836m
    Core photo at depth: 1836-1838m
    1818-1820m
    1821-1826m
    1826-1831m
    1831-1836m
    1836-1838m
    Core photo at depth: 1839-1844m
    Core photo at depth: 1849-1854m
    Core photo at depth: 1844-1849m
    Core photo at depth: 1855-1860m
    Core photo at depth: 1860-1865m
    1839-1844m
    1849-1854m
    1844-1849m
    1855-1860m
    1860-1865m
    Core photo at depth: 1865-1870m
    Core photo at depth: 1870-1875m
    Core photo at depth: 1875-1880m
    Core photo at depth: 1880-1881m
    Core photo at depth: 1882-1886m
    1865-1870m
    1870-1875m
    1875-1880m
    1880-1881m
    1882-1886m
    Core photo at depth: 1887-1892m
    Core photo at depth: 1892-1897m
    Core photo at depth: 1897-1902m
    Core photo at depth: 1902-1907m
    Core photo at depth: 1907-1912m
    1887-1892m
    1892-1897m
    1897-1902m
    1902-1907m
    1907-1912m
    Core photo at depth: 1912-1914m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    1912-1914m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1365.0
    [m]
    DC
    CGG
    1395.0
    [m]
    DC
    CGG
    1430.0
    [m]
    DC
    CGG
    1450.0
    [m]
    DC
    CGG
    1490.0
    [m]
    DC
    CGG
    1510.0
    [m]
    DC
    CGG
    1520.0
    [m]
    DC
    CGG
    1530.0
    [m]
    DC
    CGG
    1565.0
    [m]
    DC
    CGG
    1590.0
    [m]
    DC
    CGG
    1620.0
    [m]
    DC
    CGG
    1650.0
    [m]
    DC
    CGG
    1685.0
    [m]
    DC
    CGG
    1697.0
    [m]
    DC
    CGG
    1712.0
    [m]
    C
    CGG
    1715.5
    [m]
    C
    CGG
    1722.1
    [m]
    C
    CGG
    1731.7
    [m]
    C
    CGG
    1733.4
    [m]
    C
    CGG
    1733.7
    [m]
    C
    CGG
    1738.1
    [m]
    C
    CGG
    1749.9
    [m]
    C
    CGG
    1752.7
    [m]
    C
    CGG
    1760.9
    [m]
    C
    CGG
    1774.2
    [m]
    C
    CGG
    1788.5
    [m]
    C
    CGG
    1792.4
    [m]
    C
    CGG
    1798.0
    [m]
    C
    CGG
    1810.1
    [m]
    C
    CGG
    1817.3
    [m]
    C
    CGG
    1836.1
    [m]
    C
    CGG
    1856.6
    [m]
    C
    CGG
    1861.1
    [m]
    C
    CGG
    1872.2
    [m]
    C
    CGG
    1874.4
    [m]
    C
    CGG
    1876.9
    [m]
    C
    CGG
    1880.9
    [m]
    C
    CGG
    1884.9
    [m]
    C
    CGG
    1890.0
    [m]
    C
    CGG

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.84

  • 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
    17.29

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST GR
    1355
    1939
    DIL DSI LDL CNL NGT SP AMS
    1335
    1926
    DLL MSFL GR AMS
    1336
    1934
    FMI GR
    1335
    1615
    FMI GR
    1580
    1940
    MDT GR AMS
    1524
    1871
    MWD - GR RES DIR
    145
    1945
    VSP
    590
    1930

  • 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
    232.0
    36
    233.0
    0.00
    LOT
    INTERM.
    9 5/8
    1333.0
    12 1/4
    1335.0
    1.70
    LOT
    LINER
    7
    1764.0
    8 1/2
    1945.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    232
    1.06
    WATER BASED
    340
    1.06
    WATER BASED
    1145
    1.06
    WATER BASED
    1699
    1.28
    2.5
    WATER BASED
    1730
    1.28
    25.0
    WATER BASED
    1767
    1.28
    24.0
    WATER BASED
    1803
    1.28
    20.0
    WATER BASED
    1855
    1.28
    21.0
    WATER BASED
    1855
    1.28
    21.0
    WATER BASED
    1914
    1.28
    19.0
    WATER BASED
    1945
    1.28
    19.0
    WATER BASED

  • 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
    0.19