Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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10.11.2024 - 01:25
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35/9-3

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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.
    35/9-3
    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
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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
    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.
    35/9-3
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    NH 9405- INLINE 2925 & CROSSLINE 7511
    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.
    Norsk Hydro Produksjon AS
    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.
    906-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.
    50
    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,
    23.09.1997
    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.
    11.11.1997
    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.
    11.11.1999
    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.
    23.05.2006
    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/GAS
    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.
    LATE CRETACEOUS
    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.
    KYRRE 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 CRETACEOUS
    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.
    AGAT FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    22.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    348.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2783.0
    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).
    2781.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    6
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    91
    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.
    PRE-DEVONIAN
    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.
    BASEMENT
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 28' 51.76'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 58' 30.17'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6816921.17
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    551938.12
    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.
    3206

  • Wellbore history
    General
    Well 35/9-3 is located on the Måløy Slope ca 55 km west off Florø town and ca 11 km North of the Gjøa Discovery. The primary objective of the well was to prove commercial oil and gas resources in the C3 prospect of the Early Cretaceous Agat Formation. Secondary targets were seen in the Late Cretaceous to Early Paleocene.
    Operations and results
    Wildcat well 35/9-3 was spudded with the semi-submersible installation West Vanguard on 23 September 1997 and drilled to TD at 2783 m, 13 m into Basement rock. Due to repeated mud loss during drilling at about 1900 m depth, the well was technically side-tracked (35/9-3 T2) from 1827 m and to TD. The well was drilled with spud mud down to 1150 m and ANCO 2000 mud from 1150 m to TD.
    The well discovered hydrocarbons in reservoir sandstones of the Late Cretaceous, Kyrre Formation and of the Early Cretaceous, Agat Formation. No hydrocarbons were accumulated in the thin sand interval of the Cretaceous Jorsalfare Formation. The main target Agat Formation reservoir contained hydrocarbons in a 44 m sequence of mixed sand and shale layers (2657.5 - 2701.5 m). The uppermost sand layer contained gas with a GOC at 2666.5 m depth. The discovery may relate to an accumulation within a small structural closure at this level.
    MDT samples confirmed formation water in the thin sand intervals in the lower part of the Rødby reservoir zone, except in the lowermost sand interval, where oil was sampled. The MDT test showed low mobility and pressure draw down from barriers in the vicinity of the well in these sand layers. The reservoir interval of the Kyrre Formation consisted of stacked thin sands separated by shale layers in the interval 1868 -1904,5 m. The GWC was found at 1896 m and probably relates to a small structural closure with a fill-spill to the east.
    A total of five cores were cut in the Agat and Kyrre reservoir intervals. Core no 1 was cut in the first well bore, the other four were cut in the sidetrack. MDT gas samples were taken at 1883.6 m, 1870 m, and 1887.9 m in the Kyrre Formation. MDT samples were taken at 2700.6 m (oil), 2683.7 m (oil), 2681.5 m (oil), 2676.5 m (oil), 2670 m (oil), and 2662.5 m (gas). MDT sampling at 2689.2 m and 2693.5 m retrieved water.
    The well was plugged and abandoned on 11 November 1997 as a gas and oil discovery.
    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]
    1150.00
    2783.00

  • 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
    1885.0
    1903.4
    [m ]
    2
    1870.0
    1888.8
    [m ]
    3
    2663.0
    2675.3
    [m ]
    4
    2676.0
    2703.3
    [m ]
    5
    2703.2
    2730.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    104.4
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1870-1875m
    Core photo at depth: 1875-1880m
    Core photo at depth: 1880-1885m
    Core photo at depth: 1885-1880m
    Core photo at depth: 2663-2668m
    1870-1875m
    1875-1880m
    1880-1885m
    1885-1880m
    2663-2668m
    Core photo at depth: 2668-2673m
    Core photo at depth: 2673-2675m
    Core photo at depth: 2676-2681m
    Core photo at depth: 2681-2686m
    Core photo at depth: 2686-2691m
    2668-2673m
    2673-2675m
    2676-2681m
    2681-2686m
    2686-2691m
    Core photo at depth: 2691-2696m
    Core photo at depth: 2696-2700m
    Core photo at depth: 2701-2703m
    Core photo at depth: 2703-2708m
    Core photo at depth: 2708-2713m
    2691-2696m
    2696-2700m
    2701-2703m
    2703-2708m
    2708-2713m
    Core photo at depth: 2713-2718m
    Core photo at depth: 2718-2723m
    Core photo at depth: 2723-2728m
    Core photo at depth: 2728-2730m
    Core photo at depth:  
    2713-2718m
    2718-2723m
    2723-2728m
    2728-2730m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1760.0
    [m]
    DC
    RRI
    1815.0
    [m]
    DC
    RRI
    1825.0
    [m]
    DC
    RRI
    1830.0
    [m]
    DC
    RRI

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.46

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    7.67

  • 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
    34.69

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST GR
    1910
    2657
    FMI DSI NGT AMS
    1786
    2734
    HALS TLD HGNS AMS
    1868
    2779
    HALS TLD HGNS DSI AMS
    370
    1798
    HALS TLD HGNS DSI AMS
    1735
    1926
    MDT GR ACTS
    1869
    1887
    MDT GR ACTS
    2659
    2705
    MDT GR ACTS
    2675
    2700
    MWD - GR RES DIR
    370
    2783
    VSP GR
    1310
    2740

  • 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
    431.0
    36
    432.0
    0.00
    LOT
    OPEN HOLE
    435.0
    24
    435.0
    0.00
    LOT
    SURF.COND.
    13 3/8
    1141.0
    17 1/2
    1150.0
    0.00
    LOT
    INTERM.
    9 5/8
    1798.0
    12 1/4
    1810.0
    0.00
    LOT
    OPEN HOLE
    2783.0
    8 1/2
    2783.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1102
    1.15
    15.0
    WATER BASED
    1150
    1.25
    16.0
    WATER BASED
    1810
    1.26
    19.0
    WATER BASED
    1870
    1.23
    18.0
    WATER BASED
    1902
    1.25
    19.0
    WATER BASED
    1935
    1.22
    18.0
    WATER BASED
    2050
    1.22
    19.0
    WATER BASED
    2262
    1.14
    15.0
    WATER BASED
    2676
    1.14
    16.0
    WATER BASED
    2783
    1.14
    15.0
    WATER BASED

  • Pressure plots
    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.22