Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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26.11.2024 - 01:27
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7321/9-1

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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.
    7321/9-1
    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
    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
    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.
    7321/9-1
    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.
    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.
    594-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.
    35
    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,
    25.10.1988
    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.
    28.11.1988
    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.
    28.11.1990
    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.
    06.01.2005
    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.
    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.
    23.5
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    459.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    1800.0
    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).
    1799.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    3.8
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    44
    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 TRIASSIC
    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.
    SNADD FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    73° 16' 7.34'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    21° 41' 0.68'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    8138267.66
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    329361.05
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    35
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    1339

  • Wellbore history
    General
    Well 7321/9-1 was drilled on a rotated fault block on the southern margin of the Fingerdjupet Sub-basin in the Bjørnøya East area. The main objective was to test the hydrocarbon potential of the structure, with Late Triassic to Middle Jurassic sandstones as primary target horizon with Early Cretaceous and Triassic (Snadd Formation) sandstones as secondary targets. The wildcat well should also gather as much geological information as possible regarding reservoir, source and cap rock intervals. The well was positioned so that it should avoid faults that could disturb the seismic tie and at the same time would leave a minimum of untested potential up-dip from the well location.
    Operations and results
    Wildcat well 7321/9-1 was spudded with the semi-submersible rig Ross Rig 25 October 1988 and drilled to TD at 1800 m in the Late Triassic Snadd Formation. Drilling proceeded to TD without any significant problems, but on the way out of the hole the string got stuck at 1501 m. After several unsuccessful attempts, the string was shot off at 1377 m. As a result of this, and because LWD logs were run only to 1507 m (Baroid "Recorded Lithology Logging" -tool, RLL), the hole below 1507 m was not logged. There were also mechanical problems during plugging. In total as much as 40% of the rig time was thus classified as down time. The well was drilled with seawater and hi-vis sweeps down to 680 m and with KCl / polymer mud from 680 m to TD. There was no shallow gas in the hole.
    The secondary target, a prognosed sandstone above the Barremian unconformity, was not developed. Instead of a reservoir sandstone a new possible source rock with high organic content was encountered in the Barremian interval from 961 m to 986 m. The primary target reservoir interval (Stø, Nordmela and Fruholmen Formations) was penetrated at 1378.8 m. Approx. 116 m of reservoir rock was found with 35.8 m net sand. The reservoirs were water bearing with only weak indications of hydrocarbons. The prognosed Triassic target in the Snadd Formation did not contain hydrocarbon shows nor significant gas. On this basis it was interpreted as water bearing.
    Shows were recorded on cuttings from claystones in several intervals from 920 m down to 1500 m. Shows were also recorded in sandstones in the cores in the interval 1373 m to 1398 m and on cuttings from the interval 1730 m to 1750 m.
    Two cores were cut in the interval 1365 - 1398.2 m, through lower part of the Hekkingen Formation, throughout the Fuglen Formation and most of the Stø Formation. Nineteen attempts of RFT pressure testing were done with only one good measurement at 1359 m. The formation pressure here was measured to be 0.83 SG. No fluid samples were taken. From approximately 1000 m to 670 m the quality of the MSFL and sonic logs was bad due to severe washout of the hole.
    The well was permanently abandoned on 28 November 1988 as dry with minor shows in the Cretaceous and Jurassic.
    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]
    690.00
    1800.00

  • 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
    1365.0
    1384.1
    [m ]
    2
    1385.2
    1398.2
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    32.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1365-1370m
    Core photo at depth: 1370-1375m
    Core photo at depth: 1375-1380m
    Core photo at depth: 1380-1384m
    Core photo at depth: 1385-1390m
    1365-1370m
    1370-1375m
    1375-1380m
    1380-1384m
    1385-1390m
    Core photo at depth: 1390-1395m
    Core photo at depth: 1395-1398m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    1390-1395m
    1395-1398m

  • 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
    543.0
    36
    546.0
    0.00
    LOT
    INTERM.
    13 3/8
    668.0
    17 1/2
    680.0
    1.38
    LOT
    OPEN HOLE
    1800.0
    12 1/4
    1800.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST
    547
    677
    CST
    690
    1362
    DIL LSS SP GR MSFL
    540
    1371
    LDL CNL NGL CAL GR
    658
    1371
    MWD - GR RES DIR
    547
    1362
    MWD - RLL
    1351
    1506
    MWD - RLL EWR
    1351
    1496
    RFT
    937
    1365
    SHDT
    663
    1366
    VSP
    483
    1365

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.18

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.39
    pdf
    4.29

  • 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
    11.59

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    500
    1.14
    15.0
    7.0
    WATER BASED
    29.11.1988
    529
    1.05
    WATER BASED
    31.10.1988
    546
    1.05
    WATER BASED
    31.10.1988
    562
    1.05
    WATER BASED
    31.10.1988
    622
    1.14
    15.0
    7.0
    WATER BASED
    24.11.1988
    680
    1.05
    WATER BASED
    01.11.1988
    680
    1.05
    WATER BASED
    02.11.1988
    680
    1.05
    WATER BASED
    31.10.1988
    680
    1.08
    13.0
    6.0
    WATER BASED
    03.11.1988
    1008
    1.14
    14.0
    7.0
    WATER BASED
    04.11.1988
    1213
    1.14
    16.0
    7.0
    WATER BASED
    07.11.1988
    1330
    1.14
    16.0
    7.0
    WATER BASED
    07.11.1988
    1365
    1.14
    16.0
    7.0
    WATER BASED
    07.11.1988
    1387
    1.14
    17.0
    10.0
    WATER BASED
    10.11.1988
    1398
    1.14
    17.0
    9.0
    WATER BASED
    11.11.1988
    1427
    1.14
    17.0
    7.0
    WATER BASED
    14.11.1988
    1550
    1.14
    16.0
    11.0
    WATER BASED
    15.11.1988
    1723
    1.14
    18.0
    8.0
    WATER BASED
    15.11.1988
    1800
    1.14
    18.0
    8.0
    WATER BASED
    18.11.1988
    1800
    1.14
    18.0
    8.0
    WATER BASED
    15.11.1988
    1800
    1.14
    17.0
    8.0
    WATER BASED
    15.11.1988
    1800
    1.14
    18.0
    8.0
    WATER BASED
    16.11.1988
    1800
    1.14
    16.0
    7.0
    WATER BASED
    21.11.1988
    1800
    1.11
    15.0
    7.0
    WATER BASED
    21.11.1988
    1800
    1.11
    15.0
    7.0
    WATER BASED
    22.11.1988

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    547.0
    [m]
    SWC
    HYDRO
    552.0
    [m]
    SWC
    HYDRO
    557.0
    [m]
    SWC
    HYDRO
    560.0
    [m]
    SWC
    HYDRO
    563.0
    [m]
    SWC
    HYDRO
    566.0
    [m]
    SWC
    HYDRO
    590.0
    [m]
    SWC
    HYDRO
    608.0
    [m]
    SWC
    HYDRO
    632.0
    [m]
    SWC
    HYDRO
    650.0
    [m]
    SWC
    HYDRO
    674.0
    [m]
    SWC
    HYDRO
    690.0
    [m]
    SWC
    HYDRO
    710.0
    [m]
    SWC
    HYDRO
    730.0
    [m]
    DC
    GEAR
    752.0
    [m]
    SWC
    HYDRO
    770.0
    [m]
    DC
    GEAR
    800.0
    [m]
    SWC
    HYDRO
    830.0
    [m]
    DC
    GEAR
    850.0
    [m]
    SWC
    HYDRO
    860.0
    [m]
    SWC
    HYDRO
    870.0
    [m]
    SWC
    HYDRO
    880.0
    [m]
    DC
    GEAR
    890.0
    [m]
    SWC
    HYDRO
    900.0
    [m]
    SWC
    HYDRO
    900.0
    [m]
    DC
    GEAR
    920.0
    [m]
    DC
    GEAR
    925.0
    [m]
    SWC
    HYDRO
    940.0
    [m]
    DC
    GEAR
    950.0
    [m]
    SWC
    HYDRO
    955.0
    [m]
    SWC
    HYDRO
    960.0
    [m]
    SWC
    HYDRO
    960.0
    [m]
    DC
    GEAR
    962.5
    [m]
    SWC
    HYDRO
    965.0
    [m]
    SWC
    HYDRO
    967.0
    [m]
    SWC
    HYDRO
    970.0
    [m]
    SWC
    HYDRO
    974.0
    [m]
    SWC
    HYDRO
    975.5
    [m]
    SWC
    HYDRO
    977.0
    [m]
    SWC
    HYDRO
    979.0
    [m]
    SWC
    HYDRO
    980.0
    [m]
    DC
    GEARHART
    982.0
    [m]
    SWC
    HYDRO
    984.0
    [m]
    SWC
    HYDRO
    985.0
    [m]
    SWC
    HYDRO
    987.0
    [m]
    SWC
    HYDRO
    990.0
    [m]
    SWC
    HYDRO
    995.0
    [m]
    SWC
    HYDRO
    1000.0
    [m]
    DC
    GEARHART
    1000.0
    [m]
    SWC
    HYDRO
    1020.0
    [m]
    DC
    GEARHART
    1040.0
    [m]
    DC
    GEARHA
    1050.0
    [m]
    SWC
    HYDRO
    1060.0
    [m]
    DC
    GEARHART
    1080.0
    [m]
    DC
    GEARHA
    1100.0
    [m]
    DC
    GEARHA
    1120.0
    [m]
    DC
    GEARHA
    1140.0
    [m]
    DC
    GEARHA
    1150.0
    [m]
    SWC
    HYDRO
    1160.0
    [m]
    DC
    GEARHART
    1180.0
    [m]
    DC
    GEARHA
    1200.0
    [m]
    DC
    GEARHA
    1200.0
    [m]
    SWC
    HYDRO
    1220.0
    [m]
    DC
    GEARHART
    1240.0
    [m]
    DC
    GEARHA
    1250.0
    [m]
    SWC
    HYDRO
    1260.0
    [m]
    DC
    GEARHART
    1280.0
    [m]
    DC
    GEARHA
    1290.0
    [m]
    SWC
    HYDRO
    1300.0
    [m]
    SWC
    HYDRO
    1300.0
    [m]
    DC
    GEARHART
    1302.5
    [m]
    SWC
    HYDRO
    1307.0
    [m]
    SWC
    HYDRO
    1308.0
    [m]
    SWC
    HYDRO
    1311.0
    [m]
    SWC
    HYDRO
    1312.0
    [m]
    DC
    GEARHART
    1313.0
    [m]
    SWC
    HYDRO
    1315.0
    [m]
    SWC
    HYDRO
    1316.0
    [m]
    SWC
    HYDRO
    1320.0
    [m]
    SWC
    HYDRO
    1320.0
    [m]
    DC
    GEARHART
    1322.0
    [m]
    SWC
    HYDRO
    1325.0
    [m]
    DC
    GEARHART
    1325.0
    [m]
    SWC
    HYDRO
    1328.0
    [m]
    SWC
    HYDRO
    1330.0
    [m]
    SWC
    HYDRO
    1335.0
    [m]
    DC
    GEARHART
    1336.0
    [m]
    SWC
    HYDRO
    1339.0
    [m]
    SWC
    HYDRO
    1344.0
    [m]
    SWC
    HYDRO
    1345.0
    [m]
    DC
    GEARHART
    1347.5
    [m]
    SWC
    HYDRO
    1350.0
    [m]
    SWC
    HYDRO
    1355.0
    [m]
    DC
    GEARHART
    1355.0
    [m]
    SWC
    HYDRO
    1360.0
    [m]
    SWC
    HYDRO
    1362.0
    [m]
    SWC
    HYDRO
    1365.0
    [m]
    DC
    GEARHART
    1367.9
    [m]
    C
    OD
    1375.0
    [m]
    DC
    GEARHART
    1377.5
    [m]
    C
    OD
    1378.8
    [m]
    C
    ICHRON
    1379.6
    [m]
    C
    OD
    1381.6
    [m]
    C
    OD
    1382.5
    [m]
    C
    ICHRON
    1385.0
    [m]
    DC
    GEARHART
    1390.8
    [m]
    C
    OD
    1391.7
    [m]
    C
    ICHRON
    1395.0
    [m]
    DC
    GEARHART
    1395.7
    [m]
    C
    OD
    1398.0
    [m]
    C
    OD
    1405.0
    [m]
    DC
    GEARHART
    1415.0
    [m]
    DC
    GEARHA
    1425.0
    [m]
    DC
    GEARHA
    1435.0
    [m]
    DC
    GEARHA
    1445.0
    [m]
    DC
    GEARHA
    1455.0
    [m]
    DC
    GEARHA
    1465.0
    [m]
    DC
    GEARHA
    1475.0
    [m]
    DC
    GEARHA
    1485.0
    [m]
    DC
    GEARHA
    1495.0
    [m]
    DC
    GEARHA
    1505.0
    [m]
    DC
    GEARHA
    1515.0
    [m]
    DC
    GEARHA
    1525.0
    [m]
    DC
    GEARHA
    1535.0
    [m]
    DC
    GEARHA
    1545.0
    [m]
    DC
    GEARHA
    1557.0
    [m]
    DC
    GEARHA
    1567.0
    [m]
    DC
    GEARHA
    1587.0
    [m]
    DC
    GEARHA
    1600.0
    [m]
    DC
    GEARHA
    1610.0
    [m]
    DC
    GEARHA
    1620.0
    [m]
    DC
    GEARHA
    1630.0
    [m]
    DC
    GEARHA
    1640.0
    [m]
    DC
    GEARHA
    1650.0
    [m]
    DC
    GEARHA
    1660.0
    [m]
    DC
    GEARHA
    1670.0
    [m]
    DC
    GEARHA
    1680.0
    [m]
    DC
    GEARHA
    1690.0
    [m]
    DC
    GEARHA
    1700.0
    [m]
    DC
    GEARHA
    1710.0
    [m]
    DC
    GEARHA
    1720.0
    [m]
    DC
    GEARHA
    1730.0
    [m]
    DC
    GEARHA
    1740.0
    [m]
    DC
    GEARHA
    1750.0
    [m]
    DC
    GEARHA
    1760.0
    [m]
    DC
    GEARHA
    1770.0
    [m]
    DC
    GEARHA
    1780.0
    [m]
    DC
    GEARHA
    1792.0
    [m]
    DC
    GEARHA
    1797.0
    [m]
    DC
    GEARHA

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    1379.50
    [m ]
    1380.75
    [m ]
    1388.50
    [m ]
    1397.75
    [m ]