Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.11.2024 - 09:09
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7120/10-2

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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.
    7120/10-2
    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
    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.
    BARENTS SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    7120/10-2
    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.
    Esso Exploration and Production Norway 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.
    643-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.
    48
    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,
    20.07.1990
    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.
    05.09.1990
    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.
    05.09.1992
    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
    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.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    186.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2500.0
    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).
    2497.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    7.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    63
    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 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.
    HEKKINGEN FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    71° 5' 34.8'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    20° 14' 28.31'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7888153.58
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    472556.90
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    34
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    1561

  • Wellbore history
    General
    Block 7120/10 is situated on the southwest margin of the Hammerfest Basin with the Tromsø Basin to the west, and the Troms-Finnmark Platform to the south. Well 7120/10-2 was designed to drill Valanginian submarine fan sandstones, where the hydrocarbon trap is formed by up dip sand pinch out to the south and west combined with structural dip to the northeast. The reservoir was prognosed to be penetrated at 2080 m sub sea. The source kitchen for the prospect was expected to be the Hekkingen Formation of Late Jurassic, which is good to rich source rocks and contains oil prone kerogen. Surface to 214 m subsea could contain boulders and thus cause drilling problems.
    Operations and results
    Wildcat well 7120/10-2 was spudded with the semi-submersible installation Byford Dolphin on 20 July 1990 and drilled to TD at 2500 m in the Late Jurassic Hekkingen Formation. Three incidents delayed the drilling for a total of 13.5 days: 1) A boulder bed in the 36" section made it necessary to make a trip to change the BHA. The old hole could not be located on this wiper trip so the string was pulled to re-spud; 2) A wellhead connector leak needed to be diagnosed and repaired; 3) Logs hung up at ledges formed when the shale/ claystone was washed out while resistant limestone were not. As a consequence of the latter no wire line logs were obtained over the interval 2106 m to 1935 m. This interval comprises predominantly shale but does include two sandstone beds (2052 m to 2059 m and 2036 m to 2038 m). The well was drilled with seawater down to 523 m and with lignosulphonate/seawater/gel from 523 m to TD.
    The well penetrated the primary objective, Valanginian sandstones, at 2125 m within the Knurr Formation. These reservoir quality rocks comprised of sandstones with minor interbedded siltstones and shales for a thickness of 178 m down to the contact with the Late Jurassic Hekkingen Shale at 2303 m. These reservoir sands all proved water wet. The well penetrated 197 m of Late Jurassic source rock of variable richness. No truly "hot" shale was penetrated, although the Hekkingen Formation did contain organic rich material and showed a significant gas increase with moderately bright cut and crush cut fluorescence throughout. One core was cut in the interval from 2127 to 2136 m. The core was cut close to the top of the sand-prone section. No fluid sample was taken.
    The well was permanently abandoned as a dry hole on 5 September 1990.
    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]
    540.00
    2500.00

  • 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
    2127.0
    2135.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    8.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2127-2132m
    Core photo at depth: 2127-2132m
    Core photo at depth: 2132-2136m
    Core photo at depth: 2132-2135m
    Core photo at depth:  
    2127-2132m
    2127-2132m
    2132-2136m
    2132-2135m

  • 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
    248.0
    36
    250.0
    0.00
    LOT
    INTERM.
    13 3/8
    523.0
    17 1/2
    533.0
    1.86
    LOT
    INTERM.
    9 5/8
    1311.0
    12 1/4
    1321.0
    1.85
    LOT
    OPEN HOLE
    2500.0
    8 1/2
    2500.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR
    685
    1321
    DIL GR CAL SP FGT CNL
    2106
    2493
    DIL GR LSS SP CAL
    521
    1313
    DIL GR LSS SP CAL
    1312
    1878
    DIL GR LSS SP CAL
    1837
    1935
    LDL CNL GR CAL
    1312
    1878
    LDL CNL GR CAL
    1837
    1935
    MWD
    249
    2500
    SWC
    551
    1286
    VELOCITY
    375
    1930

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    211
    468
    468
    647
    647
    703
    703
    1442
    1922
    2303

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.34

  • 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
    1.25
    pdf
    41.58

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    224
    1.03
    1.0
    WATER BASED
    23.07.1990
    249
    1.03
    1.0
    WATER BASED
    25.07.1990
    249
    1.03
    1.0
    WATER BASED
    23.07.1990
    249
    1.03
    1.0
    WATER BASED
    24.07.1990
    249
    1.00
    WATER BASED
    23.07.1990
    536
    1.03
    1.0
    WATER BASED
    26.07.1990
    536
    1.07
    13.0
    3.4
    WATER BASED
    30.07.1990
    536
    1.03
    WATER BASED
    30.07.1990
    536
    1.07
    7.0
    5.3
    WATER BASED
    30.07.1990
    685
    1.08
    5.0
    5.7
    WATER BASED
    31.07.1990
    1014
    1.13
    8.0
    6.7
    WATER BASED
    01.08.1990
    1190
    1.25
    15.0
    0.5
    WATER BASED
    03.09.1990
    1300
    1.25
    15.0
    1.9
    WATER BASED
    03.09.1990
    1321
    1.15
    7.0
    8.1
    WATER BASED
    03.08.1990
    1321
    1.21
    12.0
    6.7
    WATER BASED
    09.08.1990
    1321
    1.21
    12.0
    6.7
    WATER BASED
    13.08.1990
    1321
    1.21
    12.0
    6.7
    WATER BASED
    14.08.1990
    1321
    1.15
    7.0
    8.1
    WATER BASED
    02.08.1990
    1321
    1.15
    10.0
    9.1
    WATER BASED
    06.08.1990
    1321
    1.16
    7.0
    8.1
    WATER BASED
    06.08.1990
    1321
    1.16
    9.0
    7.7
    WATER BASED
    06.08.1990
    1321
    1.21
    12.0
    6.7
    WATER BASED
    10.08.1990
    1321
    1.21
    12.0
    6.7
    WATER BASED
    13.08.1990
    1454
    1.17
    10.0
    7.7
    WATER BASED
    15.08.1990
    1670
    1.18
    11.0
    9.6
    WATER BASED
    15.08.1990
    1865
    1.16
    10.0
    7.7
    WATER BASED
    16.08.1990
    1886
    1.18
    10.0
    6.7
    WATER BASED
    17.08.1990
    2076
    1.23
    14.0
    7.7
    WATER BASED
    21.08.1990
    2086
    1.23
    12.0
    8.6
    WATER BASED
    21.08.1990
    2127
    1.23
    12.0
    7.7
    WATER BASED
    21.08.1990
    2136
    1.23
    11.0
    7.2
    WATER BASED
    21.08.1990
    2195
    1.23
    15.0
    7.2
    WATER BASED
    22.08.1990
    2500
    1.20
    12.0
    7.2
    WATER BASED
    27.08.1990
    2500
    1.26
    17.0
    8.1
    WATER BASED
    27.08.1990
    2500
    1.26
    15.0
    6.7
    WATER BASED
    27.08.1990
    2500
    1.26
    13.0
    6.7
    WATER BASED
    28.08.1990
    2500
    1.26
    15.0
    6.7
    WATER BASED
    29.08.1990
    2500
    1.26
    11.0
    5.3
    WATER BASED
    30.08.1990
    2500
    1.27
    12.0
    4.8
    WATER BASED
    31.08.1990
    2500
    1.26
    14.0
    4.8
    WATER BASED
    03.09.1990

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    551.0
    [m]
    SWC
    560.0
    [m]
    DC
    584.0
    [m]
    SWC
    630.0
    [m]
    DC
    647.0
    [m]
    SWC
    ESSO
    670.0
    [m]
    DC
    698.0
    [m]
    SWC
    708.0
    [m]
    SWC
    ESSO
    728.0
    [m]
    SWC
    ESSO
    754.0
    [m]
    SWC
    ESSO
    758.0
    [m]
    SWC
    ESSO
    797.0
    [m]
    SWC
    ESSO
    824.0
    [m]
    SWC
    ESSO
    854.0
    [m]
    SWC
    ESSO
    864.0
    [m]
    SWC
    ESSO
    891.0
    [m]
    SWC
    ESSO
    918.0
    [m]
    SWC
    ESSO
    941.0
    [m]
    SWC
    ESSO
    970.0
    [m]
    DC
    1000.0
    [m]
    SWC
    ESSO
    1020.0
    [m]
    DC
    1047.0
    [m]
    SWC
    ESSO
    1088.0
    [m]
    SWC
    ESSO
    1126.0
    [m]
    SWC
    ESSO
    1175.0
    [m]
    SWC
    ESSO
    1191.0
    [m]
    SWC
    ESSO
    1217.0
    [m]
    SWC
    ESSO
    1240.0
    [m]
    DC
    1268.0
    [m]
    SWC
    ESSO
    1286.0
    [m]
    SWC
    ESSO
    1320.0
    [m]
    DC
    1340.0
    [m]
    DC
    1365.0
    [m]
    DC
    1390.0
    [m]
    DC
    1415.0
    [m]
    DC
    1440.0
    [m]
    DC
    1465.0
    [m]
    DC
    1490.0
    [m]
    DC
    1515.0
    [m]
    DC
    1540.0
    [m]
    DC
    1565.0
    [m]
    DC
    1590.0
    [m]
    DC
    1615.0
    [m]
    DC
    1640.0
    [m]
    DC
    1665.0
    [m]
    DC
    1690.0
    [m]
    DC
    1715.0
    [m]
    DC
    1740.0
    [m]
    DC
    1748.0
    [m]
    DC
    1765.0
    [m]
    DC
    1790.0
    [m]
    DC
    1815.0
    [m]
    DC
    1840.0
    [m]
    DC
    1865.0
    [m]
    DC
    1865.0
    [m]
    DC
    1890.0
    [m]
    DC
    1915.0
    [m]
    DC
    1940.0
    [m]
    DC
    1965.0
    [m]
    DC
    1990.0
    [m]
    DC
    2015.0
    [m]
    DC
    2040.0
    [m]
    DC
    2045.0
    [m]
    DC
    2065.0
    [m]
    DC
    2090.0
    [m]
    DC
    2100.0
    [m]
    DC
    2115.0
    [m]
    DC
    2120.0
    [m]
    DC
    2128.5
    [m]
    C
    ESSO
    2130.6
    [m]
    C
    ESSO
    2132.1
    [m]
    C
    ESSO
    2134.0
    [m]
    C
    ESSO
    2135.0
    [m]
    C
    ESSO
    2135.4
    [m]
    C
    ESSO
    2140.0
    [m]
    DC
    2165.0
    [m]
    DC
    2190.0
    [m]
    DC
    2205.0
    [m]
    DC
    2215.0
    [m]
    DC
    2240.0
    [m]
    DC
    2265.0
    [m]
    DC
    2290.0
    [m]
    DC
    2290.0
    [m]
    DC
    2310.0
    [m]
    DC
    2315.0
    [m]
    DC
    2320.0
    [m]
    DC
    2340.0
    [m]
    DC
    2365.0
    [m]
    DC
    2375.0
    [m]
    DC
    2395.0
    [m]
    DC
    2415.0
    [m]
    DC
    2420.0
    [m]
    DC
    2425.0
    [m]
    DC
    2430.0
    [m]
    DC
    2450.0
    [m]
    DC
    2475.0
    [m]
    DC
    2500.0
    [m]
    DC

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    2127.55
    [m ]
    2129.50
    [m ]
    2134.92
    [m ]