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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34/10-9

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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.
    34/10-9
    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.
    34/10-9
    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.
    248-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.
    47
    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,
    24.03.1980
    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.
    09.05.1980
    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.
    09.05.1982
    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.
    15.11.2012
    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.
    APPRAISAL
    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.
    EARLY 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.
    COOK FM
    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.
    202.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2200.0
    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).
    2200.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1.75
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    64
    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.
    COOK 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' 55.34'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 15' 0.53'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6787169.27
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    459717.06
    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.
    140

  • Wellbore history
    General
    Well 34/10-9 was drilled on the central part of the Gullfaks Field. The primary objective was to test sandstones of the Early Jurassic Cook Formation. Originally the well was planned to be drilled to a total depth of 2000 m. Results from the well required further drilling into sandstones of the Statfjord Formation.
    Operations and results
    Appraisal well 34/10-9 was spudded with the semi-submersible installation Ross Rig on 24 March 1980 and drilled to TD at 2200 m in the Early Jurassic Burton Formation. As in other wells drilled in the area the pore pressure was close to the formation integrity in the pressure transition zone. Lost circulation combined with high gas readings, was experienced on several occasions in this zone between ca 1730 and 1760 m. Apart from that, the drilling was carried out without any specific problems. The well was drilled with seawater and high viscosity slugs down to 845 m, and with a gel/lignosulphonate mud system from 845 m to TD. From the well site sample description diesel was added to the mud in the interval 1260 to 1350 m.
    The Brent Group, Ness formation was encountered at 1833 m, directly underlying the Late Cretaceous Kyrre Formation. The Brent Group was hydrocarbon bearing down to base Rannoch Formation at 1945 m with ca 97 m net hydrocarbon bearing sands. The Cook Formation was hydrocarbon bearing with an oil/water contact at 2118 m. First trace of oil shows, fluorescence, was seen at 1220 m. Weak shows on claystone and limestone were recorded from this depth to 1500 m. Stronger oil shows with "oil streaks over shaker" and oil-smell were recorded from 1690 m to 1720 m in the Lista Formation.
    Four cores were cut in the well. Core 1 was cut from 1850 to 1868 m in the Etive Formation, while cores 2 to 4 were cut from 2089 m to 2130 m in the Cook Formation. The Formation interval tester (FIT) was run in the well for fluid sampling. One sample was recovered from the Brent formation at 1840 m. The sample contained hydrocarbons. The other sample was taken in the Cook Formation at 2132 m. This sample contained water.
    The well was suspended on 9 May 1980 for further drilling and testing in a later re-entry. It is classified as an oil appraisal well.
    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]
    290.00
    2410.00

  • 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
    1850.0
    1863.5
    [m ]
    2
    2089.0
    2093.2
    [m ]
    3
    2094.0
    2109.5
    [m ]
    4
    2112.0
    2129.4
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    50.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1850-1852m
    Core photo at depth: 1852-1855m
    Core photo at depth: 1855-1858m
    Core photo at depth: 1858-1860m
    Core photo at depth: 1860-1863m
    1850-1852m
    1852-1855m
    1855-1858m
    1858-1860m
    1860-1863m
    Core photo at depth: 2089-2091m
    Core photo at depth: 2091-2093m
    Core photo at depth: 2094-2096m
    Core photo at depth: 2096-2099m
    Core photo at depth: 2099-2102m
    2089-2091m
    2091-2093m
    2094-2096m
    2096-2099m
    2099-2102m
    Core photo at depth: 2102-2104m
    Core photo at depth: 2104-2107m
    Core photo at depth: 2107-2109m
    Core photo at depth: 2112-2114m
    Core photo at depth: 2114-2117m
    2102-2104m
    2104-2107m
    2107-2109m
    2112-2114m
    2114-2117m
    Core photo at depth: 2117-2120m
    Core photo at depth: 2120-2122m
    Core photo at depth: 2122-2125m
    Core photo at depth: 2125-2128m
    Core photo at depth: 2128-2129m
    2117-2120m
    2120-2122m
    2122-2125m
    2125-2128m
    2128-2129m
    Core photo at depth: 2400-2400m
    Core photo at depth: 2400-2403m
    Core photo at depth: 2403-2404m
    Core photo at depth:  
    Core photo at depth:  
    2400-2400m
    2400-2403m
    2403-2404m

  • 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
    2078.00
    2084.00
    YES
    DST
    DST 2A
    2084.00
    2090.00
    21.06.1980 - 13:00
    YES
    DST
    DST 3
    1906.00
    1910.00
    24.06.1980 - 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
    288.0
    36
    289.5
    0.00
    LOT
    SURF.COND.
    20
    830.0
    26
    845.0
    1.59
    LOT
    INTERM.
    13 3/8
    1441.0
    17 1/2
    1455.0
    1.76
    LOT
    INTERM.
    9 5/8
    1715.0
    12 1/4
    1722.0
    1.90
    LOT
    INTERM.
    9 5/8
    1718.0
    12 1/4
    1722.0
    1.90
    LOT
    LINER
    7
    2199.0
    8 1/2
    2200.0
    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
    2078
    2084
    9.5
    2.0
    2059
    2065
    9.5
    3.0
    1879
    1885
    12.7
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    32.000
    15.000
    2.0
    33.000
    32.000
    3.0
    31.000
    30.000
    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
    35
    2715
    0.854
    77
    2.0
    751
    48428
    0.847
    65
    3.0
    727
    42480
    0.866
    62

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL GR
    712
    2206
    CDL VDL GR
    1800
    1896
    CDL VDL GR
    2050
    2124
    CYBERDIP
    1718
    2428
    DLL MSFL GR
    1800
    2202
    FDC CNL GR CAL
    1718
    2428
    FDC GR CAL
    831
    1725
    GEODIP
    2350
    2428
    HDT
    1718
    2428
    ISF SON GR
    218
    2427

  • Lithostratigraphy

  • Documents – reported by the production licence (period for duty of secrecy expired)

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    350
    1.04
    waterbased
    650
    1.10
    waterbased
    825
    1.09
    waterbased
    1050
    1.20
    waterbased
    1275
    1.30
    waterbased
    1490
    1.55
    waterbased
    1630
    1.67
    waterbased
    1755
    1.82
    waterbased
    1820
    1.80
    waterbased