Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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16.07.2024 - 01:28
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15/9-21 S

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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.
    15/9-21 S
    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).
    APPRAISAL
    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
    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.
    NORTH 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.
    15/9-21
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    Geo. 58.25.1.24 N 2.45.52.23 E
    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.
    Den norske stats oljeselskap a.s
    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.
    926-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.
    62
    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,
    23.03.1998
    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.
    23.05.1998
    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.
    23.05.2000
    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.
    18.01.2007
    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.
    APPRAISAL
    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.
    SHOWS
    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.
    48.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    108.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    5126.0
    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).
    3907.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    55
    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.
    MIDDLE JURASSIC
    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.
    SLEIPNER FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    58° 25' 4.55'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 43' 4.57'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6476103.15
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    425102.30
    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.
    3334
  • Wellbore history

    General
    Well 15/9-21 S was drilled from the Sleipner Vest wellhead facility. The well was designed deviated to appraise the oil potential of the Hugin Formation east of the main Sleipner Vest Field. Another objective was to further appraise the Hugin Formation oil in the Sleipner Vest area, which had been discovered in well 15/9-B-4 T2.
    Operations and results
    The 24" section of well 15/9-21 S was spudded from the batch-set 32" conductor on 23 March 1998. Using the jack up installation West Epsilon the well was drilled to TD at 5126 m in the Middle Jurassic Sleipner Formation. No significant problems were reported from the operations. The well was drilled with PAC/seawater down to 506 m, with Aquadril KCl/glycol mud from 506 m to 3457 m, and with oil based mud from 3457 m to TD.
    The target was penetrated approximately 2670 m east of the platform centre, at a depth of 4736.5 m (3592.0 m SS), 19.6 m deep to prognosis. The first 30 m of the target sandstone drilled was Intra Heather Sandstone. The Hugin Formation was penetrated at 4767 m. Only minor hydrocarbons were found. Oil shows, partly masked by the oil based mud, was observed on the cores from the Hugin Formation. The strongest shows were seen in the interval 4784 to 4798 m where oil slowly seeped from the core.
    Four cores were cut from 4747 m in the Intra Heather Formation Sandstone to 4843 m in the Hugin Formation. No wire line fluid samples were taken.
    The well was permanently abandoned on 23 May 1998 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]
    3460.00
    5126.00
  • 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
    4747.0
    4752.3
    [m ]
    2
    4753.0
    4784.0
    [m ]
    3
    4784.0
    4815.0
    [m ]
    4
    4816.0
    4843.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    94.3
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 4747-4752m
    Core photo at depth: 4752-4752m
    Core photo at depth: 4753-4758m
    Core photo at depth: 4758-4763m
    Core photo at depth: 4763-4768m
    4747-4752m
    4752-4752m
    4753-4758m
    4758-4763m
    4763-4768m
    Core photo at depth: 4768-4773m
    Core photo at depth: 4773-4778m
    Core photo at depth: 4778-4783m
    Core photo at depth: 4783-4784m
    Core photo at depth: 4784-4789m
    4768-4773m
    4773-4778m
    4778-4783m
    4783-4784m
    4784-4789m
    Core photo at depth: 4789-4794m
    Core photo at depth: 4794-4799m
    Core photo at depth: 4799-4804m
    Core photo at depth: 4804-4809m
    Core photo at depth: 4809-4814m
    4789-4794m
    4794-4799m
    4799-4804m
    4804-4809m
    4809-4814m
    Core photo at depth: 4814-4815m
    Core photo at depth: 4816-4821m
    Core photo at depth: 4821-4826m
    Core photo at depth: 4826-4830m
    Core photo at depth: 4831-4836m
    4814-4815m
    4816-4821m
    4821-4826m
    4826-4830m
    4831-4836m
    Core photo at depth: 4836-4841m
    Core photo at depth: 4841-4843m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    4836-4841m
    4841-4843m
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    4400.0
    [m]
    DC
    U.OSH
    4406.0
    [m]
    DC
    U.OSH
    4424.0
    [m]
    DC
    U.OSH
    4430.0
    [m]
    DC
    U.OSH
    4433.0
    [m]
    DC
    U.OSH
    4439.0
    [m]
    DC
    U.OSH
    4451.0
    [m]
    DC
    U.OSH
    4457.0
    [m]
    DC
    U.OSH
    4463.0
    [m]
    DC
    U.OSH
    4469.0
    [m]
    DC
    U.OSH
    4475.0
    [m]
    DC
    U.OSH
    4481.0
    [m]
    DC
    U.OSH
    4487.0
    [m]
    DC
    U.OSH
    4496.0
    [m]
    DC
    U.OSH
    4502.0
    [m]
    DC
    U.OSH
    4508.0
    [m]
    DC
    U.OSH
    4514.0
    [m]
    DC
    U.OSH
    4520.0
    [m]
    DC
    U.OSH
    4526.0
    [m]
    DC
    U.OSH
    4532.0
    [m]
    DC
    U.OSH
    4538.0
    [m]
    DC
    U.OSH
    4544.0
    [m]
    DC
    U.OSH
    4550.0
    [m]
    DC
    U.OSH
    4556.0
    [m]
    DC
    U.OSH
    4562.0
    [m]
    DC
    U.OSH
    4568.0
    [m]
    DC
    U.OSH
    4574.0
    [m]
    DC
    U.OSH
    4580.0
    [m]
    DC
    U.OSH
    4586.0
    [m]
    DC
    U.OSH
    4592.0
    [m]
    DC
    U.OSH
    4598.0
    [m]
    DC
    U.OSH
    4604.0
    [m]
    DC
    U.OSH
    4610.0
    [m]
    DC
    U.OSH
    4619.0
    [m]
    DC
    U.OSH
    4625.0
    [m]
    DC
    U.OSH
    4631.0
    [m]
    DC
    U.OSH
    4637.0
    [m]
    DC
    U.OSH
    4643.0
    [m]
    DC
    U.OSH
    4649.0
    [m]
    DC
    U.OFS
    4853.0
    [m]
    DC
    U.OSH
    4859.0
    [m]
    DC
    U.OSH
    4865.0
    [m]
    DC
    U.OSH
    4870.0
    [m]
    DC
    U.OSH
    4877.0
    [m]
    DC
    U.OSH
    4883.0
    [m]
    DC
    U.OSH
    4889.0
    [m]
    DC
    U.OSH
    4895.0
    [m]
    DC
    U.OSH
    4901.0
    [m]
    DC
    U.OSH
    4907.0
    [m]
    DC
    U.OSH
    4913.0
    [m]
    DC
    U.OSH
    4922.0
    [m]
    DC
    U.OSH
    4928.0
    [m]
    DC
    U.OSH
    4934.0
    [m]
    DC
    U.OSH
    4940.0
    [m]
    DC
    U.OSH
    4946.0
    [m]
    DC
    U.OSH
    4952.0
    [m]
    DC
    U.OSH
    4958.0
    [m]
    DC
    U.OSH
    4964.0
    [m]
    DC
    U.OSH
    4970.0
    [m]
    DC
    U.OSH
    4976.0
    [m]
    DC
    U.OSH
    4982.0
    [m]
    DC
    U.OSH
    4988.0
    [m]
    DC
    U.OSH
    4994.0
    [m]
    DC
    U.OSH
    5000.0
    [m]
    DC
    U.OSH
    5006.0
    [m]
    DC
    U.OSH
    5012.0
    [m]
    DC
    U.OSH
    5018.0
    [m]
    DC
    U.OSH
    5024.0
    [m]
    DC
    U.OSH
    5030.0
    [m]
    DC
    U.OSH
    5036.0
    [m]
    DC
    U.OSH
    5039.0
    [m]
    DC
    U.OSH
    5045.0
    [m]
    DC
    U.OSH
    5051.0
    [m]
    DC
    U.OSH
    5057.0
    [m]
    DC
    U.OSH
    5063.0
    [m]
    DC
    U.OSH
    5069.0
    [m]
    DC
    U.OSH
    5075.0
    [m]
    DC
    U.OSH
    5081.0
    [m]
    DC
    U.OSH
    5087.0
    [m]
    DC
    U.OSH
    5093.0
    [m]
    DC
    U.OSH
    5099.0
    [m]
    DC
    U.OSH
    5105.0
    [m]
    DC
    U.OSH
    5111.0
    [m]
    DC
    U.OSH
    5117.0
    [m]
    DC
    U.OSH
    5120.0
    [m]
    DC
    U.OSH
    5126.0
    [m]
    DC
    U.OSH
  • Lithostratigraphy

  • 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
    2.98
    pdf
    18.99
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CDR MEMORY
    4843
    5126
    CHT GR FMT TTRM DSL CN ZDL HEXDI
    4272
    5120
    MWD
    266
    506
    MWD CDR
    506
    4747
    TTRM DGR MAC HDIL
    4272
    5125
  • 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
    32
    266.0
    36
    267.0
    0.00
    LOT
    SURF.COND.
    18 5/8
    501.0
    24
    506.0
    1.65
    LOT
    INTERM.
    13 3/8
    2248.0
    17 1/2
    2253.0
    1.75
    LOT
    INTERM.
    9 5/8
    3452.0
    12 1/4
    3457.0
    1.75
    LOT
    OPEN HOLE
    5126.0
    8 1/2
    5126.0
    0.00
    LOT
  • 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