Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
sodir.no    Norsk
sodir.no          Norsk
22.12.2024 - 01:25
Time of last synchronization with Norwegian Offshore Directorate's internal systems

25/11-17

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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.
    25/11-17
    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
    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.
    NORTH SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    25/11-17
    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.
    755-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.
    21
    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,
    01.03.1993
    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.
    22.03.1993
    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.
    22.03.1995
    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.
    29.08.2003
    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
    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.
    DRY
    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
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    29.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    124.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2256.0
    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).
    2255.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    3.3
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    105
    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.
    PRE-DEVONIAN
    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.
    BASEMENT
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    59° 3' 26.66'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 29' 6.59'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6546709.03
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    470469.44
    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.
    1921

  • Wellbore history
    General
    Well 25/11-17 is located south of the Balder / Grane area. The objective of the well was to test the hydrocarbon potential of sands of both Jurassic and Paleocene age. The location was chosen such that it left minimum reserves up dip in the Jurassic prospect while simultaneously penetrating the Paleocene prospect above the expected regional oil water contact.
    Operations and results
    Exploration well 25/11-17 was spudded with the semi-submersible installation "West Delta" on 1 March 1993 drilled to a total depth of 2256 m, 13 m into metamorphic basement. The well was drilled water based with spud mud down to 1413 m and with KCl / Polymer from 1413 m to TD.
    Reservoir sands were encountered in the Balder Formation from 1590 m to 1646 m but no shows were seen and the reservoir proved to be water bearing. Reservoir sands were also encountered in the Statfjord Formation from 1998 m to 2038 m but again no shows were seen and the reservoir proved to be water bearing. Overlaying the basement the well penetrated a 10 m thick layer of regolith (weathered rock). Seven conventional cores were cut from 1625.5 m to 1759.6 m, starting in the middle of the Balder Formation, continuing through the Sele, Lista and Våle Formations and ending in the Tor Formation. An eighth core was cut from 2018 m to 2037 m in the lower part of the Statfjord Formation and into the regolith layer, and a final ninth core was cut at TD in the metamorphic basement from 2248 m to 2256 m. No fluid samples were taken. The well was permanently abandoned as a dry well on 22 March 1993.
    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]
    1420.00
    2247.00

  • 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
    1625.5
    1640.0
    [m ]
    2
    1643.0
    1651.6
    [m ]
    3
    1654.0
    1660.5
    [m ]
    4
    1661.5
    1679.0
    [m ]
    5
    1679.6
    1705.0
    [m ]
    6
    1706.5
    1732.0
    [m ]
    7
    1732.6
    1759.0
    [m ]
    8
    2018.0
    2035.9
    [m ]
    9
    2248.0
    2255.9
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    150.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1625-1630m
    Core photo at depth: 1630-1635m
    Core photo at depth: 1635-1640m
    Core photo at depth: 1640-1641m
    Core photo at depth: 1643-1648m
    1625-1630m
    1630-1635m
    1635-1640m
    1640-1641m
    1643-1648m
    Core photo at depth: 1648-1651m
    Core photo at depth: 1654-1659m
    Core photo at depth: 1659-1660m
    Core photo at depth: 1661-1666m
    Core photo at depth: 1666-1671m
    1648-1651m
    1654-1659m
    1659-1660m
    1661-1666m
    1666-1671m
    Core photo at depth: 1671-1675m
    Core photo at depth: 1676-1679m
    Core photo at depth: 1679-1684m
    Core photo at depth: 1684-1689m
    Core photo at depth: 1689-1694m
    1671-1675m
    1676-1679m
    1679-1684m
    1684-1689m
    1689-1694m
    Core photo at depth: 1694-1699m
    Core photo at depth: 1699-1704m
    Core photo at depth: 1704-1705m
    Core photo at depth: 1706-1711m
    Core photo at depth: 1711-1716m
    1694-1699m
    1699-1704m
    1704-1705m
    1706-1711m
    1711-1716m
    Core photo at depth: 1716-1721m
    Core photo at depth: 1721-1726m
    Core photo at depth: 1726-1731m
    Core photo at depth: 1731-1732m
    Core photo at depth: 1732-1737m
    1716-1721m
    1721-1726m
    1726-1731m
    1731-1732m
    1732-1737m
    Core photo at depth: 1737-1742m
    Core photo at depth: 1742-1747m
    Core photo at depth: 1747-1752m
    Core photo at depth: 1752-1757m
    Core photo at depth: 1757-1759m
    1737-1742m
    1742-1747m
    1747-1752m
    1752-1757m
    1757-1759m
    Core photo at depth: 2018-2023m
    Core photo at depth: 2023-2028m
    Core photo at depth: 2028-2033m
    Core photo at depth: 2033-2035m
    Core photo at depth: 2248-2253m
    2018-2023m
    2023-2028m
    2028-2033m
    2033-2035m
    2248-2253m
    Core photo at depth: 2253-2256m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    2253-2256m

  • 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
    237.0
    36
    237.0
    0.00
    LOT
    INTERM.
    9 5/8
    1398.0
    12 1/4
    1413.0
    1.80
    LOT
    OPEN HOLE
    2256.0
    8 1/2
    2256.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    4-ARM DIP GR
    1397
    2235
    CST GR
    1465
    2222
    DLL MLL ZDL CN GR SP CHT
    1397
    2242
    FMT-HP GR CHT
    1588
    2129
    MAC SL CHT
    1397
    2228
    MWD - GR RES ROP DIR
    168
    2248
    VSP
    440
    2225

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.32

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.70

  • 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
    15.10

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    578
    1.05
    WATER BASED
    1413
    1.05
    WATER BASED
    1465
    1.20
    13.0
    WATER BASED
    1614
    1.28
    19.0
    WATER BASED

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1465.0
    [m]
    SWC
    HYDRO
    1476.0
    [m]
    SWC
    HYDRO
    1485.0
    [m]
    SWC
    HYDRO
    1500.0
    [m]
    SWC
    HYDRO
    1525.0
    [m]
    SWC
    HYDRO
    1551.0
    [m]
    SWC
    HYDRO
    1561.0
    [m]
    SWC
    HYDRO
    1567.0
    [m]
    SWC
    HYDRO
    1571.0
    [m]
    SWC
    HYDRO
    1580.0
    [m]
    SWC
    HYDRO
    1590.0
    [m]
    SWC
    HYDRO
    1630.2
    [m]
    C
    HYDRO
    1634.2
    [m]
    C
    HYDRO
    1637.0
    [m]
    C
    HYDRO
    1640.0
    [m]
    C
    HYDRO
    1930.0
    [m]
    SWC
    HYDRO
    2018.0
    [m]
    C
    HYDRO
    2022.4
    [m]
    C
    HYDRO
    2023.7
    [m]
    C
    HYDRO
    2028.7
    [m]
    C
    HYDRO
    2035.1
    [m]
    C
    HYDRO
    2045.0
    [m]
    SWC
    HYDRO
    2055.0
    [m]
    SWC
    HYDRO
    2083.0
    [m]
    SWC
    HYDRO
    2093.0
    [m]
    SWC
    HYDRO