Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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21.11.2024 - 01:28
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7117/9-1

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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.
    7117/9-1
    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
    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.
    BARENTS SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    7117/9-1
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    79409 SP 128
    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.
    323-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.
    88
    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,
    20.04.1982
    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.
    16.07.1982
    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.
    16.07.1984
    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.
    17.12.2004
    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.
    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.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    261.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3200.0
    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).
    3196.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    7.5
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    112
    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.
    EARLY 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.
    KOLMULE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    71° 22' 51.05'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    17° 56' 5.76'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7922625.97
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    604554.55
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    33
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    49

  • Wellbore history
    General
    The wildcat 7117/9-1 was the first well to be drilled in the western part of the Troms I area. It is located on the western margin of the Tromsø Basin close to the Senja High. The primary objectives of the well were to test two possible sandstone reservoirs of assumed Late Cretaceous age. Flat spots indicating fluid contacts were noted in each of these two target horizons. A secondary objective was to test sandstones of assumed Middle to Early Jurassic age. Planned TD was 2500 m in sediments of Triassic age.
    Operations and results
    The location survey showed the area to be covered with iceberg scars with depths from l m to 10 m. The dominant direction of these scars is ENE-WSW and most of them are filled with sand and silt. The quaternary sediments were about 280 m thick and layered in three main zones. There were no indications of shallow gas in the area.
    Exploration well 7117/9-1 was spudded with the semi-submersible installation Treasure Scout on 20 April 1982. Due to excessive hole deviation while drilling to 303 m the rig had to be moved to respud the well on 24 April. In this attempt high torque in extremely hard top layers caused the drill string to twist off at 299 m. The third hole was spudded on 30 April. The drilling progressed without further problems. The last section was drilled with 8 3/8" bit and the well reached TD at 3200 m in Early Cretaceous (Middle Albian to ?Aptian) clay stone. The well was drilled with seawater and hi-vis pills down to 348 m, with seawater/bentonite from 348 m to 817 m, and with gypsum / lignosulphonate from 817 m to 1220 m. From 1220 m the mud was changed to a gel lignosulphonate system as the reactive clays disappeared and the rest of the well was drilled with this mud system.
    The more shallow of the two Late Cretaceous target reservoirs was found to be a low velocity clay stone interval of Paleocene age, between 1277 m and 1328.5 m. The flat spot (at 1.4 sec TWT) could be due to horizontal bands of amorphous silica (chert) within the claystones, as seen in the core cut between 1355 m and 1370 m. The deepest of the Late Cretaceous targets turned out to be a Paleocene clay stone interval without reservoir properties. The flat spot (at 1.7 sec TWT) was not seen on wire line logs or as a change in lithology. It may reflect a similar feature as the one at 1.4 sec, but no core was taken in this interval to support this. The secondary objective interpreted as Middle to Early Jurassic sediments were found to be Cretaceous silty claystones at 1903 m, dated as Cenomanian to Albian. Three sandstone intervals were encountered in the upper part of the well. Thin Pliocene sandstone beds, 2-4 m thick were encountered in the interval 840-870 m. 11 m thick Pliocene sandstone was penetrated between 1026-1037 m. In Oligocene to Eocene a net sandstone thickness of 46 m was encountered in the interval 1139 m to 1196 m. These sandstones were all water bearing and no structural closure was mapped at these levels. The seismic reflector originally interpreted as top Jurassic proved to be an unconformity at base Paleocene level and is seen on logs at 1809 m. Another unconformity, at Cenomanian level, is evident on the logs at 1875 m.
    In a few cuttings samples between 2310 and 2475 m (Cenomanian ? Albian) traces of very poor shows were reported from siltstones and rare sandstones. These shows were described as generally no direct fluorescence except for a trace of yellow white fluorescence at 2395 m and 2408 m, trace to 20% slow to fast streaming, bluish white to yellow white fluorescence cut. No visible cut or residue was detected. There was no increase in ditch gas recordings associated with these shows, which are rated very poor. One core was cut from 1355 m to 1370 m. No fluid sample was taken.
    The well was permanently abandoned on 16 July 1982 as a dry hole.
    Testing
    No drill stem test was performed

  • Cuttings at the Norwegian Offshore Directorate
    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    NO
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    350.00
    3200.00

  • 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
    1355.0
    1365.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    10.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1355-1358m
    Core photo at depth: 1358-1360m
    Core photo at depth: 1360-1363m
    Core photo at depth: 1363-1365m
    Core photo at depth:  
    1355-1358m
    1358-1360m
    1360-1363m
    1363-1365m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    814.0
    [m]
    SWC
    IKU
    826.0
    [m]
    SWC
    IKU
    840.0
    [m]
    SWC
    IKU
    855.0
    [m]
    SWC
    IKU
    870.0
    [m]
    SWC
    IKU
    886.0
    [m]
    SWC
    IKU
    906.9
    [m]
    SWC
    IKU
    923.0
    [m]
    SWC
    IKU
    935.0
    [m]
    SWC
    IKU
    950.0
    [m]
    DC
    OD
    950.0
    [m]
    SWC
    IKU
    965.0
    [m]
    SWC
    IKU
    980.0
    [m]
    SWC
    IKU
    995.0
    [m]
    SWC
    IKU
    1010.0
    [m]
    SWC
    IKU
    1027.0
    [m]
    SWC
    IKU
    1040.0
    [m]
    SWC
    IKU
    1055.0
    [m]
    SWC
    IKU
    1068.0
    [m]
    SWC
    IKU
    1080.0
    [m]
    SWC
    IKU
    1110.0
    [m]
    SWC
    IKU
    1123.0
    [m]
    SWC
    IKU
    1140.0
    [m]
    SWC
    IKU
    1148.0
    [m]
    SWC
    IKU
    1155.0
    [m]
    SWC
    IKU
    1198.0
    [m]
    SWC
    IKU
    1205.0
    [m]
    SWC
    IKU
    1232.0
    [m]
    SWC
    IKU
    1290.0
    [m]
    SWC
    IKU
    1330.0
    [m]
    SWC
    IKU
    1365.5
    [m]
    C
    IKU
    1395.0
    [m]
    SWC
    IKU
    1425.0
    [m]
    SWC
    IKU
    1460.0
    [m]
    SWC
    IKU
    1486.0
    [m]
    SWC
    IKU
    1521.0
    [m]
    SWC
    IKU
    1560.0
    [m]
    SWC
    IKU
    1745.0
    [m]
    SWC
    IKU
    1776.0
    [m]
    SWC
    IKU
    1795.0
    [m]
    SWC
    IKU
    1805.0
    [m]
    SWC
    IKU
    1816.0
    [m]
    SWC
    IKU
    1825.0
    [m]
    SWC
    IKU
    1840.0
    [m]
    SWC
    IKU
    1875.0
    [m]
    SWC
    IKU
    1887.0
    [m]
    SWC
    IKU
    1922.0
    [m]
    SWC
    IKU
    1935.0
    [m]
    SWC
    IKU
    1980.0
    [m]
    SWC
    IKU
    2017.0
    [m]
    SWC
    IKU
    2031.0
    [m]
    SWC
    IKU
    2090.0
    [m]
    SWC
    IKU
    2100.0
    [m]
    SWC
    IKU
    2113.0
    [m]
    SWC
    IKU
    2128.0
    [m]
    SWC
    IKU
    2130.0
    [m]
    SWC
    IKU
    2141.0
    [m]
    SWC
    IKU
    2165.0
    [m]
    SWC
    IKU
    2180.0
    [m]
    SWC
    IKU
    2190.0
    [m]
    SWC
    IKU
    2206.0
    [m]
    SWC
    IKU
    2223.0
    [m]
    SWC
    IKU
    2236.0
    [m]
    SWC
    IKU
    2255.0
    [m]
    SWC
    IKU
    2270.0
    [m]
    SWC
    IKU
    2280.0
    [m]
    SWC
    IKU
    2290.0
    [m]
    SWC
    IKU
    2308.0
    [m]
    SWC
    IKU
    2327.0
    [m]
    SWC
    IKU
    2347.0
    [m]
    SWC
    IKU
    2359.0
    [m]
    SWC
    IKU
    2365.0
    [m]
    SWC
    IKU
    2381.0
    [m]
    SWC
    IKU
    2391.0
    [m]
    SWC
    IKU
    2400.0
    [m]
    SWC
    IKU
    2410.0
    [m]
    SWC
    IKU
    2420.0
    [m]
    SWC
    IKU
    2432.0
    [m]
    SWC
    IKU
    2443.0
    [m]
    SWC
    IKU
    2456.0
    [m]
    SWC
    IKU
    2472.0
    [m]
    SWC
    IKU
    2485.0
    [m]
    SWC
    IKU
    2498.0
    [m]
    SWC
    IKU
    2510.0
    [m]
    SWC
    IKU
    2520.0
    [m]
    SWC
    IKU
    2537.0
    [m]
    SWC
    IKU
    2553.0
    [m]
    SWC
    IKU
    2560.0
    [m]
    DC
    OD
    2562.0
    [m]
    SWC
    IKU
    2570.0
    [m]
    DC
    OD
    2573.0
    [m]
    SWC
    IKU
    2580.0
    [m]
    DC
    OD
    2580.0
    [m]
    SWC
    IKU
    2590.0
    [m]
    DC
    OD
    2591.0
    [m]
    SWC
    IKU
    2600.0
    [m]
    DC
    OD
    2605.0
    [m]
    SWC
    IKU
    2610.0
    [m]
    DC
    OD
    2620.0
    [m]
    DC
    OD
    2622.0
    [m]
    SWC
    IKU
    2630.0
    [m]
    DC
    OD
    2645.0
    [m]
    SWC
    IKU
    2660.0
    [m]
    SWC
    IKU
    2674.0
    [m]
    SWC
    IKU
    2686.0
    [m]
    SWC
    IKU
    2700.0
    [m]
    SWC
    IKU
    2726.0
    [m]
    SWC
    IKU
    2748.0
    [m]
    SWC
    IKU
    2805.0
    [m]
    SWC
    IKU
    2824.0
    [m]
    SWC
    IKU
    2859.0
    [m]
    SWC
    IKU
    2883.0
    [m]
    SWC
    IKU
    2897.0
    [m]
    SWC
    IKU
    2920.0
    [m]
    SWC
    IKU
    2940.0
    [m]
    SWC
    IKU
    2959.0
    [m]
    SWC
    IKU
    2985.0
    [m]
    SWC
    IKU
    3015.0
    [m]
    SWC
    IKU
    3034.0
    [m]
    SWC
    IKU
    3045.0
    [m]
    SWC
    IKU
    3070.0
    [m]
    SWC
    IKU
    3088.0
    [m]
    SWC
    IKU
    3110.0
    [m]
    SWC
    IKU
    3127.0
    [m]
    SWC
    IKU
    3140.0
    [m]
    SWC
    IKU
    3155.0
    [m]
    SWC
    IKU
    3166.0
    [m]
    SWC
    IKU

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    284
    1139
    1139
    1809
    1809
    1875
    1875

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.42

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.87

  • 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
    10.68

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL
    852
    1204
    CBL VDL
    1000
    2688
    CST
    814
    1215
    CST
    1232
    2562
    CST
    1290
    2700
    CST
    2090
    2573
    CST
    2711
    3194
    HDT CYBERDIP
    800
    3197
    ISF LSS GR
    284
    3197
    LDT CNL GR CAL
    1204
    3194
    LDT GR CAL
    345
    1217
    VSP
    350
    2705
    VSP
    2500
    3195

  • 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
    345.0
    36
    348.0
    0.00
    LOT
    SURF.COND.
    20
    800.0
    26
    817.0
    1.59
    LOT
    INTERM.
    13 3/8
    1204.0
    17 1/2
    1220.0
    1.60
    LOT
    INTERM.
    9 5/8
    2688.0
    12 1/4
    2707.0
    1.86
    LOT
    OPEN HOLE
    3200.0
    8 3/8
    3200.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    346
    1.05
    WATER BASED
    817
    1.24
    45.0
    WATER BASED
    1223
    1.30
    50.0
    WATER BASED
    2100
    1.33
    66.0
    WATER BASED
    2400
    1.48
    55.0
    WATER BASED
    2707
    1.49
    60.0
    WATER BASED
    3200
    1.53
    60.0
    WATER BASED

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    1357.70
    [m ]
    1364.14
    [m ]