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

25/11-24

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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.
    25/11-24
    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
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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
    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.
    25/11-24
    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 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.
    1131-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.
    40
    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,
    18.02.2007
    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.
    29.03.2007
    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.
    29.03.2009
    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.
    29.03.2009
    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.
    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
    2nd level with HC, age
    Age of lithostratigraphic unit, 2nd level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE.
    JURASSIC
    2nd level with HC, formation
    Name of lithostartigraphic unit, 2nd 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.
    STATFJORD GP
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    114.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2117.0
    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).
    2117.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1.2
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    81
    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° 6' 12.68'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 20' 27.73'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6551916.90
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    462253.22
    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.
    5470

  • Wellbore history
    General
    Exploration well 25/11-24 was drilled to test the Midway prospect in PL 169 and PL 028C. Midway is located south of Balder and south west of the Grane field. The main reservoir target of the well was the Heimdal sand mound, located close to the eastern pinch-out of a Tertiary submarine fan system on the western margin of the Utsira High. The primary objective was to prove commercial hydrocarbon resources within the Lista, Sele and/or Balder formations and to establish the oil-water contact. The well was located within a closure at top Jurassic level, and a secondary objective was to test the Statfjord Formation.
    Operations and results
    Well 25/11-24 was spudded with the semi-submersible installation Transocean Winner on 18 February 2007 and drilled to TD at 2117 m in Early Jurassic sediments of the Statfjord Formation. No significant technical problems were encountered in the operations. The well was drilled with sea water down to 1106 m and with a polymer/KCl/glycol mud from 1106 m to TD.
    The Rogaland Group was encountered at 1718 m. A thick Heimdal sand with excellent reservoir properties was encountered at 1788 m. It had had an insignificant (1-2 metres) oil column at the top, but was otherwise water-filled. The Heimdal sand is depleted, probably due to production from surrounding fields. Insignificant amounts of injection and/or deposited sands were observed above the main Heimdal sand (in Balder/Sele/Lista). The injections sands had oil shows and were interpreted as oil bearing. The injection sand in Balder was not in pressure communication with the Heimdal sand. In top of the Statfjord formation, a 4 meter oil column was encountered. The oil was light (0.726 g/cc) and the reservoir properties were good. Below the good oil zone the reservoir was highly laminated. The pressure analysis showed a situation with oil-down-to at 2033 m and water-up to at 2048.5 m, where the oil and the water were not in communication.
    No conventional cores were taken. A complex MDT tool string for combined formation pressure measurements, fluid sampling/scanning and minitest/VIT was run. Forty-three pretests were attempted, of which 31 were regarded as good, 7 were dry and 5 lost seal. At 2029.5 m in the Statfjord Formation, four good fluid samples (1x 2 3/4 gal sample chamber and 3x450cc bottles) were taken. Fluid sampling in the Heimdal Formation was abandoned due to bad weather.
    The well was permanently abandoned on 29 March 2007 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]
    1110.00
    2117.20

  • 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
    219.0
    36
    219.0
    0.00
    LOT
    SURF.COND.
    20
    1101.0
    26
    1106.0
    1.55
    LOT
    INTERM.
    9 5/8
    1642.0
    12 1/4
    1650.0
    1.70
    LOT
    OPEN HOLE
    2117.0
    8 1/2
    2117.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CMR GR
    1650
    2110
    MDT GR
    1722
    2103
    MSCT GR
    1888
    2024
    MSCT GR
    2027
    2103
    MWD LWD - DIR
    140
    225
    MWD LWD - DIR
    225
    1110
    MWD LWD - DIR GR RES
    225
    880
    MWD LWD - DIR GR RES
    1110
    2117
    PEX HRLA ECS
    760
    1642
    PEX HRLA SP ECS CMR
    1523
    2057
    SON SCANNER FMI GR
    295
    1643

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.36

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    txt
    0.00
    txt
    0.07
    pdf
    0.09
    pdf
    2.69

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1106
    1.29
    24.0
    WATER BASED
    1196
    1.29
    26.0
    WATER BASED
    1650
    1.35
    33.0
    WATER BASED
    1650
    1.35
    32.0
    WATER BASED
    1819
    1.22
    32.0
    WATER BASED
    2003
    1.22
    31.0
    WATER BASED
    2117
    1.22
    31.0
    WATER BASED
    2117
    1.35
    28.0
    WATER BASED

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1210.0
    [m]
    DC
    HYDRO
    1230.0
    [m]
    DC
    HYDRO
    1250.0
    [m]
    DC
    HYDRO
    1270.0
    [m]
    DC
    HYDRO
    1290.0
    [m]
    DC
    HYDRO
    1310.0
    [m]
    DC
    HYDRO
    1330.0
    [m]
    DC
    HYDRO
    1350.0
    [m]
    DC
    HYDRO
    1370.0
    [m]
    DC
    HYDRO
    1390.0
    [m]
    DC
    HYDRO
    1410.0
    [m]
    DC
    HYDRO
    1430.0
    [m]
    DC
    HYDRO
    1450.0
    [m]
    DC
    HYDRO
    1471.0
    [m]
    DC
    HYDRO
    1490.0
    [m]
    DC
    HYDRO
    1510.0
    [m]
    DC
    HYDRO
    1530.0
    [m]
    DC
    HYDRO
    1551.0
    [m]
    DC
    HYDRO
    1570.0
    [m]
    DC
    HYDRO
    1590.0
    [m]
    DC
    HYDRO
    1610.0
    [m]
    DC
    HYDRO
    1630.0
    [m]
    DC
    HYDRO
    1650.0
    [m]
    DC
    HYDRO
    1662.0
    [m]
    DC
    HYDRO
    1674.0
    [m]
    DC
    HYDRO
    1686.0
    [m]
    DC
    HYDRO
    1695.0
    [m]
    DC
    HYDRO
    1704.0
    [m]
    DC
    HYDRO
    1710.0
    [m]
    DC
    HYDRO
    1719.0
    [m]
    DC
    HYDRO
    1728.0
    [m]
    DC
    HYDRO
    1740.0
    [m]
    DC
    HYDRO
    1749.0
    [m]
    DC
    HYDRO
    1758.0
    [m]
    DC
    HYDRO
    1767.0
    [m]
    DC
    HYDRO
    1776.0
    [m]
    DC
    HYDRO
    1785.0
    [m]
    DC
    HYDRO
    1797.0
    [m]
    DC
    HYDRO
    1809.0
    [m]
    DC
    HYDRO
    1821.0
    [m]
    DC
    HYDRO
    1833.0
    [m]
    DC
    HYDRO
    1845.0
    [m]
    DC
    HYDRO
    1869.0
    [m]
    DC
    HYDRO
    1884.0
    [m]
    DC
    HYDRO
    1890.0
    [m]
    DC
    HYDRO
    1905.0
    [m]
    DC
    HYDRO
    1926.0
    [m]
    DC
    HYDRO
    1938.0
    [m]
    DC
    HYDRO
    1944.0
    [m]
    DC
    HYDRO
    1956.0
    [m]
    DC
    HYDRO
    1962.0
    [m]
    DC
    HYDRO
    2001.0
    [m]
    DC
    HYDRO
    2007.0
    [m]
    DC
    HYDRO
    2013.0
    [m]
    DC
    HYDRO
    2022.0
    [m]
    DC
    HYDRO
    2024.0
    [m]
    SWC
    HYDRO
    2029.0
    [m]
    SWC
    HYDRO
    2029.1
    [m]
    SWC
    HYDRO
    2031.0
    [m]
    DC
    HYDRO
    2034.0
    [m]
    DC
    HYDRO
    2037.0
    [m]
    DC
    HYDRO
    2038.5
    [m]
    SWC
    HYDRO
    2044.8
    [m]
    SWC
    HYDRO
    2047.0
    [m]
    SWC
    HYDRO
    2060.0
    [m]
    SWC
    HYDRO
    2062.0
    [m]
    SWC
    HYDRO
    2073.0
    [m]
    DC
    HYDRO
    2082.0
    [m]
    DC
    HYDRO
    2091.0
    [m]
    DC
    HYDRO
    2097.0
    [m]
    DC
    HYDRO
    2103.5
    [m]
    SWC
    HYDRO
    2109.0
    [m]
    DC
    HYDRO
    2117.2
    [m]
    DC
    HYDRO