Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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14.07.2024 - 01:28
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34/10-4

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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.
    34/10-4
    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.
    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
    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.
    34/10-4
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    709-404 SP 322
    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.
    222-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.
    65
    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,
    12.08.1979
    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.
    15.10.1979
    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.
    15.10.1981
    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
    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.
    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
    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.
    EOCENE
    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.
    NO FORMAL NAME
    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.
    197.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2600.0
    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).
    2598.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    77
    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' 15.65'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 13' 55.96'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6785952.41
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    458739.12
    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.
    427
  • Wellbore history

    General
    Well 34/10-4 was drilled in the Delta closure in the north-eastern part of block 34/10 in the northern North Sea. The Delta structure consists of several separate fault blocks and 34/10-4 targeted one of these. It was the third well drilled in the Delta closure. Two other separate fault blocks had previously proved oil bearing by well 34/10-1 located to the south, and well 34/10-3 located about 2 km north-west. The primary objective of well 34/10-4 was to test sandstones of Middle Jurassic age. Secondary objectives were sandstones of Early Jurassic age.
    Operations and results
    Well 34/10-4 was spudded with the semi-submersible installation Ross Rig on 12 August 1979 and drilled to TD at 2600 m in the Late Triassic Lunde Formation. No specific problems were encountered in the operations. The well was drilled with sea water and gel slugs down to 641 m and with sea water, gel, lignite and lignosulphonate in various proportions from 641 m to TD.
    A minor hydrocarbon-bearing interval was encountered in the Eocene from 1290 to 1307 m but the type of hydrocarbons could not be determined. The net Eocene "pay" was 8.25 m with average porosity of 34.4% and average water saturation of 38.5%. The main target Brent Group sandstones were encountered at 1816 m and were found oil bearing down to claystone at 1912 m. It contained 81 m of net pay with an average porosity of 33.7% and an average water saturation of 12.5%. The Statfjord Formation (2350 - 2481 m) was water bearing with 61 m of net sand with an average porosity of 23.3%.
    The first show was recorded on a well site sample from 1280 m, just above the Eocene pay. It was described with "dead oil, dull fluorescence". Otherwise, oil shows with fluorescence, cut and oil stains were recorded in limestones, claystones, siltstones and marl from 1380 m and more or less continuously down to 1755 m.
    Five cores were recovered in the interval from 1826 to 1909 m in the Rannoch and Broom formations of the Brent Group and one core from 2350.5 to 2364.5 m in the Eirikson and Raude members of the Statfjord Formation. An RFT fluid sample was taken at 1827.5 m
    The well was permanently abandoned on 15 October 1979 as an oil appraisal well.
    Testing
    Two drill stem tests were run in the Rannoch Formation.
    DST 1A tested the interval 1880 to 1885 m. The well produced 280 Sm3 oil and 24300 Sm3 gas /day through a 20/64" choke. The GOR was 87 Sm3/Sm3 and the oil gravity was 29deg API. The bottom hole maximum temperature was 72.4 deg C.
    DST 2 tested the interval 1824 to 1826 m. The well produced 810 Sm3 oil and 67400 Sm3 gas/day through two parallel chokes (20/64" + 32/64"). The GOR was 83 Sm3/Sm3 and the oil gravity was 29deg API. The bottom hole maximum temperature was 71.5 deg C.
    No water was produced in the DST's.
  • 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]
    270.00
    2600.00
  • 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
    1826.0
    1844.7
    [m ]
    2
    1845.0
    1852.4
    [m ]
    3
    1857.0
    1873.5
    [m ]
    4
    1873.5
    1891.0
    [m ]
    5
    1891.0
    1909.0
    [m ]
    6
    2350.5
    2356.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    83.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 1826-1828m
    Core photo at depth: 1828-1831m
    Core photo at depth: 1831-1834m
    Core photo at depth: 1834-1836m
    Core photo at depth: 1836-1839m
    1826-1828m
    1828-1831m
    1831-1834m
    1834-1836m
    1836-1839m
    Core photo at depth: 1839-1842m
    Core photo at depth: 1842-1844m
    Core photo at depth: 1845-1847m
    Core photo at depth: 1847-1850m
    Core photo at depth: 1850-1852m
    1839-1842m
    1842-1844m
    1845-1847m
    1847-1850m
    1850-1852m
    Core photo at depth: 1857-1859m
    Core photo at depth: 1859-1862m
    Core photo at depth: 1862-1865m
    Core photo at depth: 1865-1867m
    Core photo at depth: 1867-1870m
    1857-1859m
    1859-1862m
    1862-1865m
    1865-1867m
    1867-1870m
    Core photo at depth: 1870-1873m
    Core photo at depth: 1873-1873m
    Core photo at depth: 1873-1876m
    Core photo at depth: 1876-1878m
    Core photo at depth: 1878-1881m
    1870-1873m
    1873-1873m
    1873-1876m
    1876-1878m
    1878-1881m
    Core photo at depth: 1881-1883m
    Core photo at depth: 1884-1886m
    Core photo at depth: 1886-1888m
    Core photo at depth: 1889-1890m
    Core photo at depth: 1891-1892m
    1881-1883m
    1884-1886m
    1886-1888m
    1889-1890m
    1891-1892m
    Core photo at depth: 1893-1895m
    Core photo at depth: 1896-1898m
    Core photo at depth: 1899-1901m
    Core photo at depth: 1901-1904m
    Core photo at depth: 1904-1907m
    1893-1895m
    1896-1898m
    1899-1901m
    1901-1904m
    1904-1907m
    Core photo at depth: 1907-1909m
    Core photo at depth: 2350-2353m
    Core photo at depth: 2353-2356m
    Core photo at depth: 2356-2357m
    Core photo at depth:  
    1907-1909m
    2350-2353m
    2353-2356m
    2356-2357m
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1929.0
    [m]
    DC
    1953.0
    [m]
    DC
    1965.0
    [m]
    DC
    2026.0
    [m]
    DC
    2044.0
    [m]
    DC
    2056.0
    [m]
    DC
    2062.0
    [m]
    DC
    2068.0
    [m]
    DC
    2179.0
    [m]
    DC
    2182.0
    [m]
    DC
    2188.0
    [m]
    DC
    2189.0
    [m]
    DC
    2207.0
    [m]
    DC
    2350.0
    [m]
    DC
    2353.0
    [m]
    DC
    2356.0
    [m]
    DC
  • 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
    DST1A
    1880.00
    1885.00
    05.10.1979 - 22:00
    YES
    DST
    DST 2
    1824.00
    1826.00
    12.10.1979 - 00:00
    YES
  • Lithostratigraphy

  • Geochemical information

    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.89
    pdf
    2.32
  • 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
    19.78
    PDF
    0.60
    PDF
    0.27
    PDF
    9.40
    PDF
    0.75
    PDF
    0.34
    pdf
    41.27
    PDF
    0.49
    PDF
    7.10
    PDF
    1.08
    PDF
    1.90
    PDF
    0.53
    PDF
    0.96
    pdf
    1.33
    PDF
    9.96
    PDF
    0.95
    PDF
    0.07
    PDF
    0.04
    PDF
    2.14
    PDF
    1.20
    PDF
    0.26
    pdf
    1.87
    PDF
    0.18
    PDF
    0.82
    PDF
    1.24
    PDF
    1.65
    PDF
    4.12
    pdf
    1.17
    PDF
    0.51
    PDF
    2.05
    PDF
    0.20
    PDF
    1.01
    PDF
    0.46
    PDF
    0.12
    PDF
    0.19
    PDF
    2.31
    PDF
    0.41
  • Drill stem tests (DST)

    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    1880
    1885
    7.9
    2.0
    1824
    1826
    14.7
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    72
    2.0
    71
    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
    279
    24300
    0.880
    87
    2.0
    810
    67400
    0.880
    83
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC GR CAL
    2490
    2795
    BOND INDEX QUICK LOOK
    1604
    1980
    CBL GR
    450
    1980
    CEMENT VOLUME COMP
    1693
    1980
    CYBERDIP
    1696
    2597
    CYBERLOOK
    1693
    2597
    DLL MSFL GR
    2490
    2795
    FDC CNL GR CAL
    1693
    2596
    FDC GR CAL
    627
    1699
    HDT
    1693
    2597
    ISF SON
    222
    2597
    SONIC WAVEFORM
    1693
    1981
    VELOCITY
    620
    2705
  • 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
    273.0
    36
    274.0
    0.00
    LOT
    SURF.COND.
    20
    627.0
    26
    641.0
    1.52
    LOT
    INTERM.
    13 3/8
    1438.0
    17 1/2
    1450.0
    1.67
    LOT
    INTERM.
    9 5/8
    1693.0
    12 1/4
    1704.0
    1.98
    LOT
    LINER
    7
    1981.0
    8 1/2
    1985.0
    2.05
    LOT
    OPEN HOLE
    2600.0
    6
    2600.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    639
    1.10
    34.0
    waterbased
    891
    1.13
    45.0
    waterbased
    1104
    1.16
    50.0
    waterbased
    1311
    1.29
    45.0
    waterbased
    1458
    1.50
    47.0
    waterbased
    1750
    1.75
    56.0
    waterbased
    1959
    1.75
    47.0
    waterbased
    2438
    1.72
    49.0
    waterbased
  • Thin sections at the Norwegian Offshore Directorate

    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    1882.00
    [m ]
    1827.00
    [m ]
    1836.00
    [m ]
    1841.00
    [m ]
    1847.00
    [m ]
    1858.00
    [m ]
    1870.00
    [m ]
    1876.00
    [m ]
    1882.00
    [m ]
    1893.00
    [m ]
    1834.00
    [m ]
    1891.00
    [m ]