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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6507/11-1

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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.
    6507/11-1
    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.
    NORWEGIAN 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.
    6507/11-1
    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.
    301-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.
    89
    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,
    13.09.1981
    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.
    10.12.1981
    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.
    10.12.1983
    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.
    13.12.2005
    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.
    GAS/CONDENSATE
    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.
    YES
    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.
    ILE FM
    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.
    TILJE FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    33.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    298.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3139.0
    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).
    3138.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.8
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    111
    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.
    GREY BEDS (INFORMAL)
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    65° 4' 43.95'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 29' 23.31'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7218274.44
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    428996.14
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    32
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    68

  • Wellbore history
    General
    Wildcat well 6507/11-1 is located in the Haltenbanken area and was the third well to be drilled off shore Mid Norway. The purpose of drilling the well was to test the whole stratigraphic sequence between seabed and 500 metres below the Near-Base Jurassic reflector or into the Triassic, whichever came first.
    The specific targets, represented by vertical closures, were Middle Jurassic sandstone, below the Base Cretaceous Unconformity, and Early Jurassic sandstone below the Middle Jurassic Unconformity. A possible flatspot was identified at this level. In addition, any horizon below these reflectors will, according to Saga's interpretation, be closed, and represent a possible reservoir.
    The well is Type Well for the Tilje Formation.
    Operations and results
    Well 6507/11-1 was spudded with the semi-submersible installation West Venture on 13 September 1981 and drilled to TD at 3139 m in the Late Triassic Grey Beds. Two gas kicks occurred in the 12 1/4" section at 2125 m and 2128 m with up to 600 000 ppm gas readings observed at surface. The blow out was killed by circulating increasing mud weight in steps from 11.0 ppg to 13.2 ppg. The well was drilled with spud mud down to 460 m, with gypsum mud from 460 m to 815 m, with gypsum/polymer mud from 815 m to 1615 m, and with a lignosulphonate/causticized-lignite mud through the 12 1/4" section from 1615 m to 2300 m. In this section a number of mud additives were used in the kill well operations. The section from 2300 m to TD was drilled with a lignosulphonate mud.
    The well proved the existence of a lithological sequence ranging in age from Late Triassic (Early Rhaetian) to Quaternary. The Cenozoic succession was 1794 m thick. The dominant lithology of the Nordland and Hordaland Group was clay stone, but the former was less consolidated and contained more poorly sorted sand and rock fragments. An argillaceous sandstone of Oligocene/Miocene age was encountered at 1634 m. A possible fault zone penetrated the Rogaland Group in the interval 2097 m to 2120 m, just above the Base Tertiary Unconformity. High gas readings were recorded in this fault zone. At 2351 m a 5 m interval of the Melke Formation was encountered. At 2356 m a 54 m thick Ile Formation sandstone section was penetrated followed by the Ror Formation at 2410 m and a second sandstone section, the Tilje Formation at 2498 m. The zone from 2508 m to 2523 reach core porosities well above 30% and permeabilities in the several Darcies range is typical. Both the Ile and the Tilje Formations were gas/condensate-bearing with a gas/water contact at 2526 m. RFT pressure gradients indicated a common pressure system for the two reservoir sandstone sections. A 374 m thick coal unit (the Åre Formation) consisting of interbedded sand-, silt- and clay stone and coal/carbonaceous clay stone was found overlying the Triassic Grey Beds, which extend down to TD.
    Five conventional cores were cut in the interval 2502.1 m to 2544.0 m in the Tilje Formation. A number of reservoir fluid samples were taken by means of the RFT tool. Only the samples from the depths 2401.5 m and 2526.0 m were found nearly representative. They contained gas and condensate at a GCR of ca 17000 Sm3/Sm3 and 15000 Sm3/Sm3 respectively. The sample at 2532 m, which was taken just below the estimated GWC, consisted of water with only traces of gas as expected.
    The well was permanently abandoned on 10 December 1981 as a gas/condensate discovery.
    Testing
    Perforation of the lower part of the Middle Jurassic Sandstone, 2396 - 2402 m, yielded 764.000 m3 gas and 138 m3 of condensate per day through a 51/64 inch choke. The testing equipment limited the production rate.

  • 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]
    470.00
    3139.00

  • 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
    2502.7
    2508.8
    [m ]
    2
    2509.8
    2511.4
    [m ]
    3
    2514.3
    2517.0
    [m ]
    4
    2520.0
    2524.0
    [m ]
    5
    2527.7
    2543.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    29.7
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2502-2507m
    Core photo at depth: 2507-2508m
    Core photo at depth: 2509-2511m
    Core photo at depth: 2514-2517m
    Core photo at depth: 2520-2524m
    2502-2507m
    2507-2508m
    2509-2511m
    2514-2517m
    2520-2524m
    Core photo at depth: 2527-2532m
    Core photo at depth: 2532-2537m
    Core photo at depth: 2537-2542m
    Core photo at depth: 2542-2543m
    Core photo at depth:  
    2527-2532m
    2532-2537m
    2537-2542m
    2542-2543m

  • 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
    456.0
    36
    457.0
    1.19
    LOT
    SURF.COND.
    20
    807.0
    26
    815.0
    1.10
    LOT
    INTERM.
    13 3/8
    1600.0
    17 1/2
    1615.0
    1.81
    LOT
    INTERM.
    9 5/8
    2286.0
    12 1/4
    2300.0
    1.87
    LOT
    LINER
    7
    2625.0
    8 1/2
    3139.0
    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
    2396
    2402
    16.0
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    14.000
    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
    765000

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC GR CAL
    807
    1613
    CBL VDL CCL GR
    1570
    1983
    CORIBAND
    2350
    2720
    CST
    1623
    2295
    CST
    2305
    3120
    CYBERLOOK
    2350
    2720
    DIL BHC GR SP
    330
    812
    DLL MSFL GR
    2284
    2726
    FDC CNL GR
    456
    813
    GR
    330
    457
    HDT
    1598
    2299
    HDT
    2284
    3137
    ISF BHC GR
    2284
    2728
    ISF BHC MSFL GR SP
    1598
    2298
    ISF MSFL BHC GR
    2280
    3137
    ISF MSFL BHC SP
    807
    1613
    LDL CNL GR
    1598
    2299
    LDL CNL GR
    2384
    2527
    LDL CNL GR
    2680
    3138
    NGT
    2284
    3138
    RDC GR
    807
    1614
    RFT
    0
    0
    RFT
    0
    0
    RFT
    2325
    2606
    VELOCITY
    340
    3134

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.47

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.73
    pdf
    4.12

  • 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
    8.27
    pdf
    2.13

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    730
    1.13
    52.0
    seawater
    800
    1.10
    42.0
    seawater
    2220
    1.58
    52.0
    seawater
    2470
    1.46
    10.0
    seawater

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1820.0
    [m]
    DC
    OD
    1830.0
    [m]
    DC
    OD
    2008.4
    [m]
    C
    2012.7
    [m]
    C
    2026.5
    [m]
    C
    2048.3
    [m]
    C
    2056.0
    [m]
    C
    2071.4
    [m]
    C
    2094.0
    [m]
    C
    2100.0
    [m]
    C
    2100.0
    [m]
    DC
    OD
    2100.5
    [m]
    C
    2110.0
    [m]
    DC
    2119.0
    [m]
    DC
    2119.0
    [m]
    DC
    OD
    2124.0
    [m]
    DC
    2128.0
    [m]
    DC
    2132.0
    [m]
    DC
    2137.0
    [m]
    DC
    2140.0
    [m]
    DC
    2140.0
    [m]
    DC
    OD
    2146.0
    [m]
    DC
    2158.0
    [m]
    DC
    2158.0
    [m]
    DC
    OD
    2162.3
    [m]
    C
    2170.0
    [m]
    DC
    2182.0
    [m]
    DC
    2182.0
    [m]
    DC
    OD
    2186.0
    [m]
    DC
    2194.0
    [m]
    DC
    2200.0
    [m]
    DC
    2200.0
    [m]
    DC
    OD
    2205.0
    [m]
    DC
    2206.0
    [m]
    DC
    2212.0
    [m]
    DC
    2218.0
    [m]
    DC
    2218.0
    [m]
    DC
    OD
    2224.0
    [m]
    DC
    2236.0
    [m]
    DC
    2239.0
    [m]
    DC
    2242.0
    [m]
    DC
    OD
    2245.0
    [m]
    DC
    2245.0
    [m]
    DC
    2250.0
    [m]
    DC
    2254.0
    [m]
    DC
    2260.0
    [m]
    DC
    2260.0
    [m]
    DC
    OD
    2263.0
    [m]
    DC
    2281.0
    [m]
    DC
    2281.0
    [m]
    DC
    OD
    2287.0
    [m]
    DC
    2293.0
    [m]
    DC
    2299.0
    [m]
    DC
    2302.0
    [m]
    DC
    OD
    2308.0
    [m]
    DC
    2317.0
    [m]
    DC
    2320.0
    [m]
    DC
    2320.0
    [m]
    DC
    OD
    2326.0
    [m]
    DC
    2335.0
    [m]
    DC
    2341.0
    [m]
    DC
    2341.0
    [m]
    DC
    OD
    2344.0
    [m]
    DC
    2347.5
    [m]
    C
    2351.3
    [m]
    C
    2353.0
    [m]
    DC
    2356.0
    [m]
    DC
    2362.0
    [m]
    DC
    2362.0
    [m]
    DC
    OD
    2371.0
    [m]
    DC
    2374.0
    [m]
    DC
    2380.0
    [m]
    DC
    2380.0
    [m]
    DC
    OD
    2383.0
    [m]
    DC
    2389.0
    [m]
    DC
    2398.0
    [m]
    DC
    2398.0
    [m]
    DC
    2400.0
    [m]
    DC
    2401.0
    [m]
    DC
    OD
    2407.0
    [m]
    DC
    2416.0
    [m]
    DC
    2419.0
    [m]
    DC
    2423.0
    [m]
    DC
    2425.0
    [m]
    DC
    2434.0
    [m]
    DC
    2440.0
    [m]
    DC
    2440.4
    [m]
    C
    2461.0
    [m]
    DC
    2466.0
    [m]
    DC
    2479.0
    [m]
    DC
    2484.5
    [m]
    C