Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.12.2024 - 01:25
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36/1-2

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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.
    36/1-2
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    36/1-2
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    LINE CH 431-120 SP.730
    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.
    Saga Petroleum ASA
    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.
    138-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.
    63
    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,
    26.08.1975
    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.
    27.10.1975
    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.
    27.10.1977
    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.
    11.02.2005
    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.
    SHOWS
    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.
    25.5
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    226.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3255.6
    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).
    3250.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    6.3
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    82
    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.
    61° 53' 0.25'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    4° 0' 52.19'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6861772.37
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    553340.71
    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.
    436

  • Wellbore history
    General
    The exploratory well, 36/1-2, was drilled on Block 36/1 in the northern Norwegian North Sea approximately 25 km west of Måløy in western Norway, east of the Norwegian Trench. The primary target of well 36/1-2 was possible hydrocarbon bearing sandstones of the Middle and Late Jurassic. The secondary target was possible hydrocarbon bearing Early Cretaceous sandstones. The geological sequence on East Greenland shows favourable sand developments in the Lower Cretaceous and similar depositional configurations might exist in the 041/042-license area.
    Operations and results
    Wildcat well was spudded with the semi-submersible installation Deepsea Saga on 26 August 1975 and drilled to TD at 3255 m in metamorphic gneiss basement. No significant problems were encountered during operations. The well was drilled with salt-water gel mud down to 650 m, with gypsum mud from 650 m to 1406 m, and with lignosulphonate mud from 1406 m to TD.
    The secondary target Early Cretaceous sandstone (Agat Formation) was encountered from 2815 m to 2865 m. The primary target Jurassic sandstones were found to be Intra Heather Sandstone, from 3146 m to top of the basement at 3233 m. No hydrocarbons were found on logs, but shows, often characterized as "tary dead oil", were encountered from 2330 m in the Late Cretaceous Tryggvason Formation down to 3192 m in the Late Jurassic Intra Heather sandstone. The strongest shows were recorded in silty sandstone of the Agat Formation from 2815 m to 2825 m, described in well reports as " light brown stain, pale yellow fluorescence and weak, white, streaming cut, accompanied by traces of oil in mud."
    One conventional core was cut over the interval 2987.4 m to 3005.8 m with 100% recovery. The core was taken on sand indication in middle Jurassic, but the recovered core consisted of shale with a thin stringer of tight siltstone. Five FMT samples were attempted in the interval 3154.5 m to 3185.5 m. Three of these recovered only mud due to no seal to the formation while one was a tool failure. The only successful sample was from 3154.5 m, from which 144 cm3 formation water was recovered. A total of 75 sidewall cores were taken between 2810 m and 3250 m. Five of these had only fractional recovery and nine had no recovery.
    The well was permanently abandoned as dry with shows on 27 October 1975.
    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]
    360.00
    3255.00

  • 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
    2987.0
    3005.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    18.8
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2996-2998m
    Core photo at depth: 2998-3000m
    Core photo at depth: 3001-3003m
    Core photo at depth: 3003-3005m
    Core photo at depth:  
    2996-2998m
    2998-3000m
    3001-3003m
    3003-3005m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1280.0
    [m]
    DC
    OD
    1300.0
    [m]
    DC
    OD
    1320.0
    [m]
    DC
    OD
    1330.0
    [m]
    DC
    OD
    1350.0
    [m]
    DC
    OD
    1360.0
    [m]
    DC
    OD
    1370.0
    [m]
    DC
    OD
    1380.0
    [m]
    DC
    OD
    1390.0
    [m]
    DC
    OD
    1400.0
    [m]
    DC
    OD
    1410.0
    [m]
    DC
    OD
    1420.0
    [m]
    DC
    OD
    1440.0
    [m]
    DC
    OD
    1460.0
    [m]
    DC
    OD
    1480.0
    [m]
    DC
    OD
    1500.0
    [m]
    DC
    OD
    1520.0
    [m]
    DC
    OD
    1540.0
    [m]
    DC
    OD
    1550.0
    [m]
    DC
    OD
    1560.0
    [m]
    DC
    OD
    1570.0
    [m]
    DC
    OD
    1580.0
    [m]
    DC
    OD
    1590.0
    [m]
    DC
    OD
    1600.0
    [m]
    DC
    OD
    1610.0
    [m]
    DC
    RRI
    1620.0
    [m]
    DC
    OD
    1630.0
    [m]
    DC
    RRI
    1640.0
    [m]
    DC
    OD
    1650.0
    [m]
    DC
    RRI
    1660.0
    [m]
    DC
    OD
    1670.0
    [m]
    DC
    OD
    1680.0
    [m]
    DC
    OD
    1690.0
    [m]
    DC
    RRI
    1700.0
    [m]
    DC
    OD
    1710.0
    [m]
    DC
    RRI
    1720.0
    [m]
    DC
    OD
    1730.0
    [m]
    DC
    RRI
    1740.0
    [m]
    DC
    OD
    1750.0
    [m]
    DC
    RRI
    1760.0
    [m]
    DC
    OD
    1770.0
    [m]
    DC
    OD
    1780.0
    [m]
    DC
    OD
    1790.0
    [m]
    DC
    RRI
    1800.0
    [m]
    DC
    OD
    1810.0
    [m]
    DC
    RRI
    1820.0
    [m]
    DC
    OD
    1830.0
    [m]
    DC
    RRI
    1840.0
    [m]
    DC
    OD
    1850.0
    [m]
    DC
    RRI
    1860.0
    [m]
    DC
    OD
    1870.0
    [m]
    DC
    RRI
    1880.0
    [m]
    DC
    OD
    1890.0
    [m]
    DC
    RRI
    1900.0
    [m]
    DC
    OD
    1910.0
    [m]
    DC
    RRI
    1920.0
    [m]
    DC
    OD
    1930.0
    [m]
    DC
    RRI
    1940.0
    [m]
    DC
    OD
    1950.0
    [m]
    DC
    RRI
    1960.0
    [m]
    DC
    OD
    1970.0
    [m]
    DC
    RRI
    1985.0
    [m]
    DC
    OD
    1990.0
    [m]
    DC
    RRI
    2000.0
    [m]
    DC
    OD
    2010.0
    [m]
    DC
    RRI
    2020.0
    [m]
    DC
    OD
    2030.0
    [m]
    DC
    RRI
    2040.0
    [m]
    DC
    OD
    2050.0
    [m]
    DC
    RRI
    2060.0
    [m]
    DC
    OD
    2070.0
    [m]
    DC
    RRI
    2080.0
    [m]
    DC
    OD
    2090.0
    [m]
    DC
    RRI
    2100.0
    [m]
    DC
    OD
    2110.0
    [m]
    DC
    RRI
    2120.0
    [m]
    DC
    OD
    2130.0
    [m]
    DC
    RRI
    2140.0
    [m]
    DC
    OD
    2150.0
    [m]
    DC
    RRI
    2160.0
    [m]
    DC
    OD
    2170.0
    [m]
    DC
    RRI
    2180.0
    [m]
    DC
    OD
    2190.0
    [m]
    DC
    OD
    2200.0
    [m]
    DC
    OD
    2205.0
    [m]
    DC
    RRI
    2220.0
    [m]
    DC
    OD
    2225.0
    [m]
    DC
    RRI
    2240.0
    [m]
    DC
    OD
    2245.0
    [m]
    DC
    RRI
    2260.0
    [m]
    DC
    OD
    2265.0
    [m]
    DC
    RRI
    2280.0
    [m]
    DC
    OD
    2285.0
    [m]
    DC
    RRI
    2300.0
    [m]
    DC
    OD
    2305.0
    [m]
    DC
    OD
    2320.0
    [m]
    DC
    OD
    2325.0
    [m]
    DC
    RRI
    2340.0
    [m]
    DC
    OD
    2345.0
    [m]
    DC
    RRI
    2360.0
    [m]
    DC
    OD
    2365.0
    [m]
    DC
    RRI
    2380.0
    [m]
    DC
    OD
    2385.0
    [m]
    DC
    RRI
    2400.0
    [m]
    DC
    OD
    2405.0
    [m]
    DC
    OD
    2420.0
    [m]
    DC
    OD
    2425.0
    [m]
    DC
    RRI
    2440.0
    [m]
    DC
    OD
    2445.0
    [m]
    DC
    RRI
    2460.0
    [m]
    DC
    OD
    2465.0
    [m]
    DC
    RRI
    2480.0
    [m]
    DC
    OD
    2485.0
    [m]
    DC
    RRI
    2500.0
    [m]
    DC
    OD
    2520.0
    [m]
    DC
    OD
    2540.0
    [m]
    DC
    OD
    2560.0
    [m]
    DC
    OD
    2580.0
    [m]
    DC
    OD
    2600.0
    [m]
    DC
    OD
    2620.0
    [m]
    DC
    OD
    2640.0
    [m]
    DC
    OD
    2660.0
    [m]
    DC
    OD
    2680.0
    [m]
    DC
    OD
    2700.0
    [m]
    DC
    OD
    2720.0
    [m]
    DC
    OD
    2740.0
    [m]
    DC
    OD
    2740.0
    [m]
    DC
    RRI
    2760.0
    [m]
    DC
    OD
    2760.0
    [m]
    DC
    RRI
    2780.0
    [m]
    DC
    RRI
    2780.0
    [m]
    DC
    OD
    2800.0
    [m]
    DC
    RRI
    2800.0
    [m]
    DC
    OD
    2820.0
    [m]
    DC
    OD
    2840.0
    [m]
    DC
    OD
    2860.0
    [m]
    DC
    OD
    2870.0
    [m]
    DC
    RRI
    2987.3
    [m]
    C
    HYDRO
    2990.3
    [m]
    C
    HYDRO
    2993.3
    [m]
    C
    HYDRO
    2996.3
    [m]
    C
    HYDRO
    2999.3
    [m]
    C
    HYDRO
    3002.3
    [m]
    C
    HYDRO
    3005.0
    [m]
    C
    HYDRO

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.28

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.52

  • 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
    11.42

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC SONIC GR
    224
    3251
    CBL
    350
    1378
    CBL
    1650
    2870
    DLL MSFL
    2869
    3251
    FDC CNL
    2869
    3250
    HDT
    2868
    3252
    IES
    362
    3251
    VELOCITY
    380
    3240

  • 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
    362.0
    36
    364.0
    0.00
    LOT
    SURF.COND.
    20
    635.0
    26
    637.0
    0.00
    LOT
    INTERM.
    13 3/8
    1377.0
    17 1/2
    1380.0
    0.00
    LOT
    INTERM.
    9 5/8
    2873.0
    12 1/4
    2875.0
    0.00
    LOT
    OPEN HOLE
    3255.0
    8 1/2
    3255.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    444
    1.06
    spud mud
    1406
    1.07
    41.0
    12.0
    water based
    2678
    1.11
    43.0
    15.0
    water based
    2880
    1.12
    44.0
    16.0
    water based
    2954
    1.50
    57.0
    28.0
    water based
    3128
    1.55
    45.0
    20.0
    water based