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

25/11-26

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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.
    25/11-26
    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
    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
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    25/11-26
    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.
    Statoil Petroleum 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.
    1430-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.
    32
    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,
    16.01.2013
    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.
    17.02.2013
    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.
    17.02.2015
    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.
    13.04.2015
    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.
    22.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    130.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2235.0
    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).
    2235.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    0.4
    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° 14' 3.21'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 36' 40.99'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6566350.08
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    477824.03
    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.
    7105

  • Wellbore history
    General
    Well 25/11-26 was drilled on the Utsira High in the North Sea ca 1 km northwest of the Grane Field. The main objective of well 25/11-26 was to prove commercial hydrocarbons in the Eocene Odin sandstone Member of the Nanna prospect, and determine whether this reservoir was in communication with the Grane Field. The secondary objective was to validate the seismic AVO anomaly of the Nanna prospect, and thereby provide means of de-risking other Odin sandstone prospects within the licence. A third objective was to prove commercial hydrocarbons in Late Jurassic Intra Draupne Formation Sandstones of the Leviathan prospect.
    Operations and results
    Well 25/11-26 was spudded with the semi-submersible installation Ocean Vanguard on 16 January 2013 and drilled to TD at 2235 m in the Early Jurassic Statfjord Group. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis sweeps down to 1099 m and with XP-07 oil based mud from 1099 m to TD.
    No hydrocarbons were shown in any of the prospects. The gas readings were very low throughout the whole well. There was no sign of the Odin sandstone in the Balder Formation resulting in no oil or gas shows. The Draupne Formation consisted of claystone with minor limestone stringers and only a thin stringer of tight sandstone, no hydrocarbons were seen.
    No cores were cut. No fluid samples were taken.
    The well was permanently abandoned on 17 February 2013 as a dry well.
    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]
    1100.00
    2235.00

  • 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
    201.0
    36
    207.0
    0.00
    SURF.COND.
    13 3/8
    1086.0
    17 1/2
    1099.0
    1.61
    LOT
    OPEN HOLE
    2235.0
    12 1/4
    2235.0
    0.00

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    AIT MSIP PEX GR
    1085
    2235
    MWD - ARCVRES9 TELE
    1084
    1099
    MWD - PP
    152
    207
    MWD - PPX5 ARCVRES9 PP
    207
    1084
    VSP ZO GR
    183
    2225

  • Lithostratigraphy

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1080
    1.28
    22.0
    XP-07 - Yellow
    2080
    1.28
    18.0
    XP-07 - Yellow
    2235
    1.28
    20.0
    XP-07 - Yellow
    2235
    1.28
    20.0
    XP-07 - Yellow

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1100.0
    [m]
    DC
    ROBERTSO
    1120.0
    [m]
    DC
    ROBERT
    1140.0
    [m]
    DC
    ROBERT
    1160.0
    [m]
    DC
    ROBERT
    1180.0
    [m]
    DC
    ROBERT
    1190.0
    [m]
    DC
    ROBERT
    1200.0
    [m]
    DC
    ROBERT
    1220.0
    [m]
    DC
    ROBERT
    1240.0
    [m]
    DC
    ROBERT
    1250.0
    [m]
    DC
    ROBERT
    1270.0
    [m]
    DC
    ROBERT
    1370.0
    [m]
    DC
    ROBERT
    1440.0
    [m]
    DC
    ROBERT
    1450.0
    [m]
    DC
    ROBERT
    1460.0
    [m]
    DC
    ROBERT
    1470.0
    [m]
    DC
    ROBERT
    1480.0
    [m]
    DC
    ROBERT
    1490.0
    [m]
    DC
    ROBERT
    1510.0
    [m]
    DC
    ROBERT
    1530.0
    [m]
    DC
    ROBERT
    1550.0
    [m]
    DC
    ROBERT
    1570.0
    [m]
    DC
    ROBERT
    1590.0
    [m]
    DC
    ROBERT
    1620.0
    [m]
    DC
    ROBERT
    1640.0
    [m]
    DC
    ROBERT
    1660.0
    [m]
    DC
    ROBERT
    1670.0
    [m]
    DC
    ROBERT
    1680.0
    [m]
    DC
    ROBERT
    1686.0
    [m]
    DC
    ROBERT
    1692.0
    [m]
    DC
    ROBERT
    1698.0
    [m]
    DC
    ROBERT
    1707.0
    [m]
    DC
    ROBERT
    1713.0
    [m]
    DC
    ROBERT
    1719.0
    [m]
    DC
    ROBERT
    1725.0
    [m]
    DC
    ROBERT
    1731.0
    [m]
    DC
    ROBERT
    1734.0
    [m]
    DC
    ROBERT
    1737.0
    [m]
    DC
    ROBERT
    1743.0
    [m]
    DC
    ROBERT
    1746.0
    [m]
    DC
    ROBERT
    1749.0
    [m]
    DC
    ROBERT
    1755.0
    [m]
    DC
    ROBERT
    1761.0
    [m]
    DC
    ROBERT
    1764.0
    [m]
    DC
    ROBERT
    1767.0
    [m]
    DC
    ROBERT
    1770.0
    [m]
    DC
    ROBERT
    1773.0
    [m]
    DC
    ROBERT
    1776.0
    [m]
    DC
    ROBERT
    1779.0
    [m]
    DC
    ROBERT
    1785.0
    [m]
    DC
    ROBERT
    1791.0
    [m]
    DC
    ROBERT
    1797.0
    [m]
    DC
    ROBERT
    1809.0
    [m]
    DC
    ROBERT
    1836.0
    [m]
    DC
    ROBERT
    1940.0
    [m]
    DC
    ROBERT
    1960.0
    [m]
    DC
    ROBERT
    1970.0
    [m]
    DC
    ROBERT
    1990.0
    [m]
    DC
    ROBERT
    2070.0
    [m]
    DC
    ROBERT
    2080.0
    [m]
    DC
    ROBERT
    2090.0
    [m]
    DC
    ROBERT
    2093.0
    [m]
    DC
    ROBERT
    2099.0
    [m]
    DC
    ROBERT
    2102.0
    [m]
    DC
    ROBERT
    2108.0
    [m]
    DC
    ROBERT
    2114.0
    [m]
    DC
    ROBERT
    2120.0
    [m]
    DC
    ROBERT
    2126.0
    [m]
    DC
    ROBERT
    2129.0
    [m]
    DC
    ROBERT
    2135.0
    [m]
    DC
    ROBERT
    2141.0
    [m]
    DC
    ROBERT
    2147.0
    [m]
    DC
    ROBERT
    2153.0
    [m]
    DC
    ROBERT
    2159.0
    [m]
    DC
    ROBERT
    2162.0
    [m]
    DC
    ROBERT
    2165.0
    [m]
    DC
    ROBERT
    2171.0
    [m]
    DC
    ROBERT
    2177.0
    [m]
    DC
    ROBERT
    2186.0
    [m]
    DC
    ROBERT
    2207.0
    [m]
    DC
    ROBERT
    2216.0
    [m]
    DC
    ROBERT
    2225.0
    [m]
    DC
    ROBERT
    2235.0
    [m]
    DC
    ROBERT