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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6507/11-2

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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.
    6507/11-2
    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
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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.
    NORWEGIAN SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    6507/11-2
    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.
    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.
    325-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.
    43
    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,
    18.04.1982
    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.
    30.05.1982
    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.
    30.05.1984
    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.
    28.06.2007
    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.
    33.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    243.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2905.0
    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).
    2905.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    88
    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° 10' 59.7'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 36' 39.84'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7229774.55
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    434952.38
    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.
    51

  • Wellbore history
    General
    Wildcat well 6507/11-2 was drilled as the fourth well offshore Mid-Norway in the Møre/Trøndelag II area. The well was drilled on a symmetric, north-south trending horst called Y-1 in the northeastern part of the block, where seismic line SG 8158-401 indicated a possible minor rollover trending north-south at the Base Cretaceous level. The objective of well 6507/11-2 was to test the stratigraphic sequence below the Top Palaeocene reflector. The targets, represented by expected minor vertical closures, were sandstone reservoirs of Early - Middle Jurassic age. The entrapment of major petroleum accumulations was dependent upon a lateral sealing mechanism in the northern part of the Y-l horst.
    Operations and results
    Well 6507/11-2 was spudded with the semi-submersible installation West Venture on 18 April 1982 and drilled to TD at 2905 m in the Late Triassic Grey Beds. No significant problems were encountered during operations. The well was drilled with seawater and slugs of spud mud down to 412 m, with gypsum mud from 412 m to 857 m, with "Pro-mud" gypsum polymer mud from 857 m to 1775 m, and with Lignosulphonate mud from 1775 m to TD. In the Jurassic and Triassic section from 1898 to TD, sandstones with a total net porous sand thickness of 395 m was found. They were all water bearing. The Net-Gross ratio of the Jurassic interval, 1898-2622 m is 0.45. The Middle/Early Jurassic Ile Formation (1948-2040 m) was fine to medium grained and well sorted sandstone. A net sand thickness of 65 m was defined in Ile, with porosity of 31% and permeabilities ranging from 100 mD to 28 D. The upper part was clean and showed extremely good reservoir rock properties. The lower part of the sand contained significant amounts of mica. Although this part was less permeable than the top, this too was a very good reservoir rock. The Early Jurassic sand (2117 - 2289 m) was less sorted than the Middle Jurassic sand. It was very fine grained and contained some shale. A net thickness of 120 m with an average porosity of 26% was estimated. The permeability was around 60 mD. The sandstones in the Coal Unit (2289-2761 m) and Triassic grey beds (2761-2905 m) had estimated average porosity of 29% and a total net thickness of 210 m.
    The logs showed that the sands in the well were all water wet. No shows were reported from this well. The formation pressures of the Jurassic and Triassic sandstones gave a gradient of 0.44 psi/ft. All sandstones seemed to belong to the same pressure regime.
    Six conventional cores were cut, four in the Middle/Early - and two in Early Jurassic Sandstone reservoirs. A full suit of logs including RFT pressure measurements were run in the Jurassic and Triassic. No fluid samples were collected. The bottom hole temperature at final TD can be estimated to 88 deg C based on Horner corrected wire line BHT's. The Triassic was only partly penetrated by this well.
    The well was permanently abandoned on 30 May 1982 as a dry 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]
    420.00
    2905.00

  • 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
    1965.5
    1975.0
    [m ]
    2
    1976.0
    1977.2
    [m ]
    3
    1991.4
    2001.0
    [m ]
    4
    2002.9
    2014.9
    [m ]
    5
    2119.0
    2124.5
    [m ]
    6
    2126.0
    2127.9
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    39.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1965-1969m
    Core photo at depth: 1969-1972m
    Core photo at depth: 1972-1975m
    Core photo at depth: 1976-1977m
    Core photo at depth: 1991-1994m
    1965-1969m
    1969-1972m
    1972-1975m
    1976-1977m
    1991-1994m
    Core photo at depth: 1994-1998M
    Core photo at depth: 1998-2001M
    Core photo at depth: 2002-2006M
    Core photo at depth: 2006-2010M
    Core photo at depth: 2010-2013m
    1994-1998M
    1998-2001M
    2002-2006M
    2006-2010M
    2010-2013m
    Core photo at depth: 2013-2014m
    Core photo at depth: 2119-2022m
    Core photo at depth: 2122-2124m
    Core photo at depth: 2126-2127m
    Core photo at depth:  
    2013-2014m
    2119-2022m
    2122-2124m
    2126-2127m

  • 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
    410.0
    36
    420.0
    0.00
    LOT
    SURF.COND.
    20
    845.0
    26
    860.0
    1.57
    LOT
    INTERM.
    13 3/8
    1764.0
    17 1/2
    1770.0
    1.82
    LOT
    OPEN HOLE
    2905.0
    12 1/4
    2905.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR BI
    300
    1764
    CHKSHOT
    450
    2900
    CST
    1178
    2904
    HDT
    1763
    2904
    ISF LSS MSFL GR
    410
    856
    ISF LSS MSFL GR
    845
    1768
    ISF LSS MSFL GR
    1764
    2425
    ISF LSS MSFL GR
    2405
    2903
    LDL CNL GR
    410
    857
    LDL CNL GR
    1764
    2425
    LDL CNL GR
    2415
    2904
    LDT CNL GR
    845
    1774
    NGS
    1764
    2406
    PEF NGS PB
    1875
    2160
    RFT
    1955
    2194

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.26
    pdf
    0.99
    pdf
    0.40
    pdf
    4.82

  • 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
    13.51
    pdf
    13.51

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    412
    1.06
    seawater
    1310
    1.12
    38.0
    waterbased
    1800
    1.22
    42.0
    waterbased
    2003
    1.23
    50.0
    waterbased
    2905
    1.23
    50.0
    waterbased