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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6605/1-1

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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.
    6605/1-1
    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
    Press release
    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.
    6605/1-1
    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.
    StatoilHydro 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.
    1213-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.
    59
    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,
    07.12.2008
    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.
    03.02.2009
    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.
    03.01.2011
    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.
    03.01.2011
    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.
    23.5
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    1157.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3947.0
    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).
    3944.5
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    4.9
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    134
    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 CRETACEOUS
    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.
    NISE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    66° 48' 23.7'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    5° 10' 32.6'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7411677.28
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    595608.97
    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.
    5979

  • Wellbore history
    General
    Well 6605/1-1 was drilled in the Vigrid Syncline of the Vøring Basin in the Norwegian Sea. The primary objective of the well was to prove hydrocarbons within the Obelix prospect, a deep marine turbidite system. The main target was two sand lobes from Maastrichtian age, within the Springar Formation (Hvithval Member). The secondary objective was to evaluate the Late Cretaceous Nise Formation. Other objectives in the main reservoir section were to verify the Springar reservoir properties and calibrate the Springar section to the seismic.
    Operations and results
    Wildcat well 6605/1-1 was spudded in 1157 m water depth with the semi-submersible installation Transocean Leader on 7 December 2008 and drilled to TD at 3947 m in the Late Cretaceous Nise Formation. A 12 1/4" pilot hole was drilled to 2260 m, primarily for optimizing the setting depth of the 20" surface casing and for data acquisition, but also to check for shallow water flow. No shallow water flow was observed. The pilot hole was then opened up to 26" and the well was drilled to TD without significant technical problems. It was drilled with Seawater/hi-vis sweeps/Glydril mud down to 2260 m, with Ultradril water based mud from 2260 m to 3133 m, and with Ultradril DW water based mud from 3133 m to TD.
    The well penetrated rocks of Quaternary, Tertiary and Cretaceous age and TD of the well was within the late Cretaceous Nise Formation, at 3947m. The well penetrated the two Springar reservoir (Hvithval Member) sand lobes at 3231.7 m and 3306.5 m. The upper and lower sands constitute 48 and 15 m net reservoir sections, respectively. The upper sand lobe has average porosity of 23.7%, with average permeability of 37 mD. The corresponding lower sand averages are 22.8% and 2.9 mD, respectively. The secondary target, Nise Formation was penetrated at 3853.5 m. Reservoir properties here are poor. All reservoirs were water bearing. Mud gas peaks were recorded when entering the Hvithval Member sand lobes. No oil shows were seen anywhere in the well.
    Two 18 m cores were cut from 3239 to 3269 m in the Springar reservoir with recovery of 74.3% and 80.7% respectively. The MDT tool was run in the Springar Formation for pressure points and fluid samples. Nine valid pressure points were recorded and water samples with gas were collected at 2334.5 m. The samples were highly contaminated with drilling mud and did not give reliable information about the formation water salinity. Temperatures were measured on wire line at roughly three different reference depths. Horner corrections of these three data sets give a reasonably consistent temperature gradient that extrapolates to 134 deg C at final TD.
    The well was permanently abandoned on 3 February 2009 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]
    2270.00
    3947.00

  • 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
    3239.0
    3250.4
    [m ]
    2
    3254.0
    3266.1
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    23.5
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    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
    1270.0
    36
    1270.0
    0.00
    LOT
    SURF.COND.
    20
    2251.0
    26
    2260.0
    1.30
    LOT
    PILOT HOLE
    2260.0
    12 1/4
    2260.0
    0.00
    LOT
    INTERM.
    13 3/8
    3120.0
    17 1/2
    3133.0
    1.48
    LOT
    OPEN HOLE
    3947.0
    12 1/4
    3947.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    HRLA PEX MSIP
    3120
    3634
    HRLA PEX MSIP RR
    3600
    3925
    MDT
    3231
    3323
    MSCT
    3239
    3269
    MWD - POWERPULSE
    1181
    1272
    MWD - POWERPULSE ARC
    1272
    3130
    MWD - TELE ARC
    3818
    3947
    MWD - TELE ARC GVR
    3239
    3818
    MWD - TELE ARC GVR STET
    3130
    3150
    MWD - TELE SON ARC SADN
    1272
    2260
    VSP
    3120
    3634

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    1181
    1181
    1398
    1938
    1938
    2415
    2415
    2615
    2936
    2936
    3232
    3331
    3853

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.55

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    txt
    0.00
    txt
    0.01

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    2260
    1.11
    15.0
    Ultradrill
    2263
    1.11
    14.0
    Ultradrill
    2320
    1.12
    14.0
    Ultradrill
    2320
    1.17
    18.0
    Ultradrill
    2470
    1.13
    13.0
    Ultradrill
    2838
    1.18
    21.0
    Ultradrill
    3130
    1.20
    22.0
    Ultradrill
    3140
    1.22
    24.0
    Ultradrill
    3618
    1.24
    28.0
    Ultradrill
    3819
    1.24
    28.0
    Ultradrill
    3947
    1.24
    29.0
    Ultradrill