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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34/10-3

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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.
    34/10-3
    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).
    APPRAISAL
    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.
    SUSPENDED
    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
    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.
    34/10-3
    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.
    Den norske stats oljeselskap a.s
    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.
    211-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.
    86
    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,
    14.03.1979
    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.
    07.06.1979
    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.
    07.06.1981
    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.
    05.12.2012
    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.
    NO
    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.
    MIDDLE JURASSIC
    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.
    BRENT GP
    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.
    140.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2802.0
    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).
    2801.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    4
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    93
    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 TRIASSIC
    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.
    LUNDE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 12' 49.48'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 11' 55.03'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6787020.80
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    456946.80
    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.
    426

  • Wellbore history
    General
    Well 34/10-3 was the second well drilled in the Delta closure in block 34/10 in the Northern North Sea .  In the first well, 34/10-1, hydrocarbons were tested and proven to be present throughout the Brent sand. The primary objective of the well 34/10-3 was to test sandstones of Middle Jurassic age. Secondary objectives were sandstones of Early Jurassic and Late Triassic age.
    Operations and results
    Well was spudded with the semi-submersible installation Norskald on 14 March 1979 and drilled to TD at 2802 m. When coring for core no 10 the core jammed at 2512.5 m and the core head matrix was left in the hole. Fishing commenced for 3 and a half day until most of it was recovered. Otherwise the operation proceeded without any significant problem. The well was drilled with seawater/gel down to 587 m and with Chrome Lignosulphonate mud from 587 m to TD.
    Oil shows (yellow fluorescence, cut and "dead oil stain" were recorded at 1410 - 1470 m at the base of the Hordaland Group. Stronger shows were seen from 1814 m in the Shetland Group m and down to top Brent reservoir. Oil in the mud was observed at 1814 m. The Middle Jurassic Brent Group was encountered at 1892 m, directly underlying a thin Albian-Aptian age Cromer Knoll section. The Brent Group was oil bearing down to the oil water contact at 1972 m. Oil shows on cores continued down to 1997 m.
    Eight cores were cut in succession from 1904 m to 2025 m in the Brent Group, and one core was cut from 2467 m to 2478.8 m in the Early Jurassic Amundsen Formation. No wire line fluid samples were taken due to problems with sand plugging.
    The well was suspended on 7 June 1979 as an oil appraisal well.
    Testing
    Three drill stem tests were conducted in the Brent Group, one water test and two oil tests. Sand production was a problem in the tests.
    DST 1 perforated the interval 1990 to 1995 in the water zone. It produced 420 m3 water/day through a 20/64" choke. The water density was 1.0294 g/cm3. The bottom hole maximum temperature was 75.5 deg C, measured at 1973 m.
    DST 2 perforated the interval 1935 to 1940 m. It produced 450 Sm3 oil and 33000 Sm3 gad /day through two parallel chokes of diameters 20/64" and 10 /64". The GOR was 70 Sm3/Sm3, the oil gravity was 29.2 deg API, and the gas gravity was 0.656 (air = 1). The bottom hole maximum temperature was 72 deg C, measured at 1915 m.
    DST 3 perforated the interval 1895 to 1900 m. It produced 103 Sm3 oil/day. The gas rate was not recorded. The oil gravity was 29 deg API. The bottom hole maximum temperature was 69.5 deg C, measured at 1871 m.

  • 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]
    310.00
    2802.00

  • 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
    1904.0
    1918.7
    [m ]
    2
    1919.4
    1928.8
    [m ]
    3
    1930.9
    1933.4
    [m ]
    4
    1936.1
    1947.7
    [m ]
    5
    1953.2
    1969.0
    [m ]
    6
    1971.1
    1989.2
    [m ]
    7
    1991.9
    2007.3
    [m ]
    8
    2007.3
    2025.0
    [m ]
    9
    2467.0
    2478.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    117.0
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1904-1906m
    Core photo at depth: 1906-1908m
    Core photo at depth: 1909-1912m
    Core photo at depth: 1912-1914m
    Core photo at depth: 1914-1917m
    1904-1906m
    1906-1908m
    1909-1912m
    1912-1914m
    1914-1917m
    Core photo at depth: 1917-1918m
    Core photo at depth: 1919-1922m
    Core photo at depth: 1922-1924m
    Core photo at depth: 1924-1927m
    Core photo at depth: 1927-1929m
    1917-1918m
    1919-1922m
    1922-1924m
    1924-1927m
    1927-1929m
    Core photo at depth: 1930-1933m
    Core photo at depth: 1936-1938m
    Core photo at depth: 1938-1941m
    Core photo at depth: 1941-1944m
    Core photo at depth: 1944-1946m
    1930-1933m
    1936-1938m
    1938-1941m
    1941-1944m
    1944-1946m
    Core photo at depth: 1946-1947m
    Core photo at depth: 1953-1955m
    Core photo at depth: 1955-1958m
    Core photo at depth: 1958-1961m
    Core photo at depth: 1961-1964m
    1946-1947m
    1953-1955m
    1955-1958m
    1958-1961m
    1961-1964m
    Core photo at depth: 1964-1966m
    Core photo at depth: 1966-1969m
    Core photo at depth: 1971-1973m
    Core photo at depth: 1973-1976m
    Core photo at depth: 1976-1979m
    1964-1966m
    1966-1969m
    1971-1973m
    1973-1976m
    1976-1979m
    Core photo at depth: 1979-1981m
    Core photo at depth: 1981-1984m
    Core photo at depth: 1984-1987m
    Core photo at depth: 1987-1989m
    Core photo at depth: 1989-1991m
    1979-1981m
    1981-1984m
    1984-1987m
    1987-1989m
    1989-1991m
    Core photo at depth: 1991-1994m
    Core photo at depth: 1994-1997m
    Core photo at depth: 1997-2000m
    Core photo at depth: 2000-2002m
    Core photo at depth: 2003-2005m
    1991-1994m
    1994-1997m
    1997-2000m
    2000-2002m
    2003-2005m
    Core photo at depth: 2005-2007m
    Core photo at depth: 2007-2010m
    Core photo at depth: 2010-2012m
    Core photo at depth: 2012-2015m
    Core photo at depth: 2015-2018m
    2005-2007m
    2007-2010m
    2010-2012m
    2012-2015m
    2015-2018m
    Core photo at depth: 2018-2020m
    Core photo at depth: 2020-2023m
    Core photo at depth: 2023-2025m
    Core photo at depth: 2467-2469m
    Core photo at depth: 2469-2472m
    2018-2020m
    2020-2023m
    2023-2025m
    2467-2469m
    2469-2472m
    Core photo at depth: 2472-2475m
    Core photo at depth: 2475-2477m
    Core photo at depth: 2477-2478m
    Core photo at depth:  
    Core photo at depth:  
    2472-2475m
    2475-2477m
    2477-2478m

  • Oil samples at the Norwegian Offshore Directorate
    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    DST 2
    1940.00
    1935.00
    01.06.1979 - 00:00
    YES

  • 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
    254.0
    36
    257.0
    0.00
    LOT
    SURF.COND.
    20
    571.0
    26
    586.0
    1.64
    LOT
    INTERM.
    13 3/8
    1475.0
    17 1/2
    1488.0
    1.72
    LOT
    INTERM.
    9 5/8
    1812.0
    12 1/4
    1820.0
    2.02
    LOT
    LINER
    7
    2346.0
    8 1/2
    2347.0
    2.31
    LOT
    OPEN HOLE
    2802.0
    6
    2803.0
    0.00
    LOT

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    1965
    1970
    7.9
    2.0
    1910
    1915
    7.9
    3.0
    1870
    1875
    4.0
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    31.500
    2.0
    30.600
    3.0
    69
    Drill stem tests (DST)
    Test number
    Oil
    [Sm3/day]
    Gas
    [Sm3/day]
    Oil density
    [g/cm3]
    Gas grav. rel.air
    GOR
    [m3/m3]
    1.0
    2.0
    450
    33000
    0.877
    0.656
    70
    3.0
    103
    0.882

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC GR CAL
    2490
    2795
    CBL GR
    195
    1809
    CBL VDL GR
    1670
    2344
    DLL MSFL GR
    1809
    2346
    FDC CNL GR CAL
    1809
    2798
    FDC GR CAL
    571
    1818
    HDT
    1809
    2797
    ISF SON GR SP
    175
    2797
    VELOCITY
    620
    2705

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.18
    pdf
    2.07
    pdf
    2.90
    pdf
    0.49

  • 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
    1.01
    PDF
    0.26
    PDF
    11.67
    PDF
    0.17
    PDF
    3.38
    PDF
    0.38
    pdf
    4.28
    PDF
    1.29
    pdf
    70.37
    PDF
    3.14
    PDF
    3.15
    PDF
    0.54
    pdf
    4.33
    PDF
    7.17
    PDF
    0.41
    PDF
    3.59
    PDF
    0.06
    PDF
    0.62
    PDF
    2.42
    PDF
    1.00
    PDF
    1.56
    PDF
    2.47
    PDF
    2.37
    PDF
    0.10
    PDF
    0.77
    PDF
    2.66
    PDF
    0.34
    PDF
    0.54
    PDF
    4.86

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    600
    1.08
    42.0
    waterbased
    835
    1.09
    40.0
    waterbased
    960
    1.14
    41.0
    waterbased
    1555
    1.50
    42.0
    waterbased
    1810
    1.55
    44.0
    waterbased
    1895
    1.78
    47.0
    waterbased
    2405
    1.60
    50.0
    waterbased