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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30/9-2

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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.
    30/9-2
    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.
    SUSPENDED
    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.
    30/9-2
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    ST 8006 - 117 SP 1505
    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.
    370-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.
    103
    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,
    01.04.1983
    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.
    12.07.1983
    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.
    12.07.1985
    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.
    28.05.2003
    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.
    OIL/GAS
    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
    1st level with HC, age
    Age of lithostratigraphic unit, 1st level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE. See also Norwegian Offshore Directorate bulletins.
    MIDDLE JURASSIC
    1st level with HC, formation
    Name of lithostartigraphic unit, 1st level, where hydrocarbons were encountered. Shown only for released wells. Examples of legal values: BASEMENT, COOK FM, EKOFISK FM, HEIMDAL FM, SANDNES FM, SOGNEFJORD FM, TARBERT FM, BRENT GP. See also Norwegian Offshore Directorate bulletins.
    BRENT GP
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    105.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2830.0
    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).
    2830.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    12
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    107
    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 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.
    DRAKE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    60° 27' 53'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 49' 13.03'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6703339.30
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    490116.41
    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.
    11

  • Wellbore history
    General
    The wildcat 30/9-2 was planned as the first well on the Gamma structure in block 30/9. Well 30/6-9 had previously penetrated the structure but this well failed to encounter the oil/water contact. The primary objectives of 30/9-2 were to verify the reserve estimate for the main part of the gamma structure and penetrate the oil/water contact in the lower part of the Brent Group. Additional objectives were to obtain core material from the oil zone in the Etive Formation and perform a water injection test in this, obtain information on the quality of the reservoir in the water zone and stratigraphical information on the southern part of the Gamma structure.& The well was temporarily abandoned for about one year and then re-entered for an extended test.
    Operations and results
    Wildcat well 30/9-2 was spudded with the semi-submersible installation "Nortrym" on 1 April 1983 and drilled to a total depth of 2830 m in the Early Jurassic Dunlin Group. The well was drilled using water-based mud down to the 12 1/4" hole at 1715 m. The 12 1/4" hole was drilled to TD using oil based mud ("ENVIROMUL" and "IL 2832 oil" as oil base). While running the 13 3/8" casing, this got stuck at 1334 m. The casing was worked free using diesel in the mud and the casing was set at 1680 m. After drilling the 12 1/4" hole to 2203 m the drill pipe got stuck with the bit at 2170 m. Several unsuccessful attempts were made to free the pipe. The drill pipe was then backed off and the well was cemented back and sidetracked from 1482.5 m.
    The Brent Group sandstones (2578-2767 m) RKB were hydrocarbon bearing down to 2737m where an oil/water contact was encountered within the Etive Formation sandstones (2698-2767m).& No additional hydrocarbon bearing reservoirs were encountered by this well. Poor hydrocarbon shows reported from Upper Cretaceous limestones were considered uninteresting. The Ness Formation (2578-2698 m) consisted of very fine to coarse-grained sandstones with interbedded shales, coals and occasional siltstones.& The Etive Formation consisted of very fine to predominantly medium grained homogeneous sandstones with pebble beds in the upper part.& The sandstones were locally micaceous and carbonaceous and contained stringers with abundant calcareous cement.& Twelve conventional cores were cut continuously from 2591 m near the top of the Ness Formation and down into the top of the Drake Formation shales at 2777 m. FMT pressure recordings and sampling were performed in the well.& Samples of oil and gas were obtained from the FMT samples at 2599.5 m (Ness Formation) and 2728 m (Etive Formation).& Samples of water/filtrate were obtained from the samples at 2639.5 m (Ness Formation) and 2755 m (Etive Formation).
    The well was temporarily abandoned as an oil and gas appraisal on 12 July 1983. The well was re-entered as 30/9-2 R on 1 June 1986 for a test production. The re-entry was formally completed on 7 July, and subsequently re-classified to 30/9-T-2 for the test production.&
    Testing
    Four DST's were performed in the well, two in the Etive Formation (DST1 from 2738 m to 2737 m and DST2 from 2704 m to 2728 m) and two in the Ness Formation (DST3 2685 m to 2693 m and DST4 from 2595 m to 2604 m). The DST performed in the lower part of the Etive Formation was a combined production and injection test, which produced water. The other DST's produced oil and gas.

  • 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]
    230.00
    2155.00

  • 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
    2591.0
    2594.0
    [m ]
    2
    2594.0
    2611.4
    [m ]
    4
    2614.0
    2632.0
    [m ]
    5
    2632.0
    2650.4
    [m ]
    6
    2650.5
    2668.8
    [m ]
    7
    2669.0
    2687.0
    [m ]
    8
    2687.0
    2704.3
    [m ]
    9
    2705.0
    2722.5
    [m ]
    10
    2723.0
    2738.2
    [m ]
    11
    2741.0
    2757.0
    [m ]
    12
    2759.0
    2776.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    176.7
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2591-2594m
    Core photo at depth: 2594-2599m
    Core photo at depth: 2598-2604m
    Core photo at depth: 2604-2609m
    Core photo at depth: 2609-2612m
    2591-2594m
    2594-2599m
    2598-2604m
    2604-2609m
    2609-2612m
    Core photo at depth: 2614-2619m
    Core photo at depth: 2619-2624m
    Core photo at depth: 2624-2629m
    Core photo at depth: 2629-2632m
    Core photo at depth: 2632-2637m
    2614-2619m
    2619-2624m
    2624-2629m
    2629-2632m
    2632-2637m
    Core photo at depth: 2637-2642m
    Core photo at depth: 2642-2647m
    Core photo at depth: 2647-2651m
    Core photo at depth: 2650-2655m
    Core photo at depth: 2655-2660m
    2637-2642m
    2642-2647m
    2647-2651m
    2650-2655m
    2655-2660m
    Core photo at depth: 2660-2665m
    Core photo at depth: 2665-2669m
    Core photo at depth: 2669-2674m
    Core photo at depth: 2674-2679m
    Core photo at depth: 2679-2684m
    2660-2665m
    2665-2669m
    2669-2674m
    2674-2679m
    2679-2684m
    Core photo at depth: 2684-2687m
    Core photo at depth: 2687-2692m
    Core photo at depth: 2692-2697m
    Core photo at depth: 2697-2702m
    Core photo at depth: 2702-2705m
    2684-2687m
    2687-2692m
    2692-2697m
    2697-2702m
    2702-2705m
    Core photo at depth: 2705-2710m
    Core photo at depth: 2710-2715m
    Core photo at depth: 2715-2720m
    Core photo at depth: 2720-2723m
    Core photo at depth: 2723-2728m
    2705-2710m
    2710-2715m
    2715-2720m
    2720-2723m
    2723-2728m
    Core photo at depth: 2728-2733m
    Core photo at depth: 2733-2738m
    Core photo at depth: 2738-2739m
    Core photo at depth: 2741-2746m
    Core photo at depth: 2746-2751m
    2728-2733m
    2733-2738m
    2738-2739m
    2741-2746m
    2746-2751m
    Core photo at depth: 2751-2755m
    Core photo at depth: 2756-2757m
    Core photo at depth: 2759-2764m
    Core photo at depth: 2764-2769m
    Core photo at depth: 2769-2774m
    2751-2755m
    2756-2757m
    2759-2764m
    2764-2769m
    2769-2774m
    Core photo at depth: 2774-2777m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    2774-2777m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2486.0
    [m]
    SWC
    RRI
    2499.4
    [m]
    SWC
    RRI
    2508.9
    [m]
    SWC
    RRI
    2515.9
    [m]
    SWC
    RRI
    2524.0
    [m]
    SWC
    RRI
    2534.5
    [m]
    SWC
    RRI
    2542.0
    [m]
    SWC
    RRI
    2566.0
    [m]
    SWC
    RRI
    2577.5
    [m]
    SWC
    RRI
    2584.0
    [m]
    SWC
    RRI
    2591.7
    [m]
    C
    RRI
    2593.1
    [m]
    C
    OD
    2593.8
    [m]
    C
    OD
    2603.5
    [m]
    C
    RRI
    2609.8
    [m]
    C
    OD
    2610.6
    [m]
    C
    OD
    2610.7
    [m]
    C
    RRI
    2617.8
    [m]
    C
    RRI
    2627.9
    [m]
    C
    RRI
    2639.0
    [m]
    C
    RRI
    2647.8
    [m]
    C
    RRI
    2658.2
    [m]
    C
    RRI
    2667.5
    [m]
    C
    RRI
    2670.3
    [m]
    C
    OD
    2677.1
    [m]
    C
    RRI
    2678.7
    [m]
    C
    OD
    2684.0
    [m]
    C
    RRI
    2695.8
    [m]
    C
    OD
    2697.3
    [m]
    C
    RRI
    2697.7
    [m]
    C
    OD
    2703.3
    [m]
    C
    RRI
    2703.4
    [m]
    C
    OD
    2710.8
    [m]
    C
    RRI
    2720.2
    [m]
    C
    RRI
    2732.7
    [m]
    C
    RRI
    2742.1
    [m]
    C
    RRI
    2744.7
    [m]
    C
    RRI
    2748.8
    [m]
    C
    OD
    2750.4
    [m]
    C
    RRI
    2752.0
    [m]
    C
    RRI
    2753.4
    [m]
    C
    OD
    2764.4
    [m]
    C
    OD
    2770.0
    [m]
    C
    OD
    2795.0
    [m]
    C
    RRI
    2825.5
    [m]
    C
    RRI

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.43

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.86
    pdf
    1.33

  • 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
    2.75
    pdf
    17.72

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL
    1250
    1680
    CDL CAL GR
    900
    1689
    CDL CNL CAL GR
    1479
    2828
    DIFL LS BHC GR
    1482
    2830
    DIFL LS BHC SP GR
    218
    900
    DIFL LS BHC SP GR
    900
    1700
    FMT
    2305
    2765
    FMT
    2639
    2690
    FMT SAMPLE
    2728
    2728
    FMT SAMPLE
    2755
    2755
    HDT
    1900
    2826
    SPECTRALOG
    2550
    2790
    SWC
    2230
    2825
    TEMP
    930
    1250
    VSP
    1268
    2830

  • 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
    219.0
    36
    220.0
    0.00
    LOT
    SURF.COND.
    20
    901.0
    26
    915.0
    1.78
    LOT
    INTERM.
    13 3/8
    1680.0
    17 1/2
    1715.0
    1.81
    LOT
    INTERM.
    9 5/8
    2830.0
    12 1/4
    2830.0
    0.00
    LOT
    OPEN HOLE
    4083.0
    8 1/2
    4083.0
    0.00

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    2582
    1.16
    1.0
    WATER BASED
    2594
    1.16
    1.0
    WATER BASED
    2710
    1.16
    1.0
    WATER BASED
    2722
    1.16
    1.0
    WATER BASED
    2724
    1.16
    1.0
    WATER BASED

  • 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