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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9/10-1

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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.
    9/10-1
    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
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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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    9/10-1
    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.
    Norske Murphy Oil Company
    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.
    46-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.
    20
    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,
    30.08.1970
    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.
    18.09.1970
    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.
    18.09.1972
    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.
    22.04.2005
    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.
    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.
    29.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    59.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2205.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    0.75
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    57
    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.
    TOR FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    57° 0' 4.02'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    4° 0' 33.52'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6318104.70
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    561313.41
    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.
    183

  • Wellbore history
    General
    Well 9/10-1 is located in the Åsta Graben of the Danish Norwegian Basin in the North Sea. The location was selected to explore the northeast regional limit of Oligocene sands at a non-structural site and to reach the Danian very low on the South flank of the seismic "L" structure. The main objectives were the first and second Oligocene sands, which were gas bearing in the 2/3-1 well. The location, in addition, tested for presence of the Danian section, which had proved to be oil bearing in the Phillips Ekofisk area approximately 40 miles to the Southwest. There was also a possibility of the development of gas bearing zones within the Miocene section.
    Operations and results
    Wildcat well 9/10-1 was spudded with the jack-up installation Gulftide on 30 August 1970 and drilled to TD at 2205 m in the Late Cretaceous Tor Formation. A 38" hole was drilled to 143 m with seawater. After spotting a gel slurry, 36" drive pipe was set at 123 m. Drilling was continued with a 26" bit to 221 m using seawater where lost circulation became excessive. Attempts with a 50-barrel LCM slurry and a 300-sack cement plug were unsuccessful in sealing off the thief zone. The drilling was continued "blind" to 251 m where a 450-sack gel slurry was spotted and 20" casing run to 248 m and cemented. After installing 20" BOP, 17 1/2" hole was drilled to 953 m using a 10.7 lb gel mud. Three attempts were made to log this surface section but hole bridging conditions occurring at 279 m and 457 m would not permit deeper penetration. Went into the hole with the bit, tagged bottom, and then drilled 5 m with no obstruction. The hole was conditioned and logged from 457 m to 88 m. Rigged up BHA and went to bottom with the bit, cleaned out to 957 m, and drilled an additional 6 m. The 13 3/8'' casing was then run and set with no problems to a depth of 960 m. Drilling continued with a 12 1/4" bit from under the 13 3/8'' casing to core point at 2145 m. After coring drilling continued to 2205 m where the pipe became stuck at the collars while making a connection. The free point was determined at 2192 m. It was freed after spotting 50 bbl. of diesel oil mixed with Pipe Lax. No problems were encountered while logging at total depth after conditioning the hole. The well was drilled with seawater and gel down to 498 m, with seawater/Spersene from 498 m to 953 m, and with seawater/Spersene/XP-20 mud from 953 m to TD.
    Sidewall cores and logs showed no sand development in the Miocene and Oligocene. A thin Danian chalk (Ekofisk Formation) was encountered on top of Late Cretaceous chalk (Tor Formation). Fair gas shows were recorded in the Miocene from 1006 m 1097 m, believed to be associated with shales and thin limestone stringers. The Oligocene section and the Danian - Late Cretaceous chalks were water bearing.
    A 30 ft core was cut from 2144.6 m to 2153.7 m in chalk of the Tor Formation. Measured porosity in the core was 18 % to 22 %.  Sidewall cores were taken at 30 selected intervals with a recovery of 21 cores. No fluid sample was taken.
    The well was permanently abandoned on 18 September 1970 as a dry hole.
    Testing
    No drill stem test was performed.

  • 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
    7036.0
    7066.0
    [ft ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    9.1
    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
    123.0
    36
    123.0
    0.00
    LOT
    SURF.COND.
    20
    248.0
    26
    252.0
    0.00
    LOT
    INTERM.
    13 3/8
    960.0
    17 1/2
    963.0
    0.00
    LOT
    OPEN HOLE
    2205.0
    12 1/2
    2205.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC GR
    963
    2201
    GR
    366
    963
    GRN
    427
    1280
    HDT
    963
    2202
    IES
    248
    457
    IES
    964
    2204
    IES GR
    88
    450
    ML MLL C
    1250
    1280
    ML MLL C
    1646
    1695
    ML MLL C
    2088
    2204
    VELOCITY
    486
    2205

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    88
    948
    1874
    1874
    1884
    1957
    2112
    2112
    2116

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.14

  • 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
    1.20
    pdf
    0.86

  • Documents – Norwegian Offshore Directorate papers
    Documents – Norwegian Offshore Directorate papers
    Document name
    Document format
    Document size [MB]
    pdf
    33.18
    pdf
    0.60

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    251
    1.04
    41.0
    seawater
    769
    1.28
    40.0
    waterbased
    963
    1.25
    40.0
    waterbased
    1050
    1.37
    54.0
    waterbased
    1947
    1.36
    52.0
    waterbased
    2204
    1.50
    48.0
    waterbased