Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
sodir.no          Norsk
22.11.2024 - 09:09
Time of last synchronization with Norwegian Offshore Directorate's internal systems

35/9-2

Export: PDF icon PDF
  • General information

    General information
    Attribute Value
    Wellbore name
    Official name of wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    35/9-2
    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).
    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.
    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.
    35/9-2
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    NH 8902 - ROW 816 & KOL. 1229
    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.
    663-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.
    92
    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,
    01.01.1991
    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.
    03.04.1991
    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.
    03.04.1993
    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.
    15.12.2006
    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.
    YES
    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.
    LATE 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.
    SOGNEFJORD FM
    2nd level with HC, age
    Age of lithostratigraphic unit, 2nd level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE.
    MIDDLE JURASSIC
    2nd level with HC, formation
    Name of lithostartigraphic unit, 2nd 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.
    FENSFJORD FM
    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.
    367.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2885.0
    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).
    2877.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    14
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    100
    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.
    PRE-DEVONIAN
    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.
    BASEMENT
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 20' 8.62'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 56' 16.74'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6800705.66
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    550196.62
    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.
    1600
  • Wellbore history

    General
    Well 35/9-2 was designed to drill on the A-Structure in block 35/9 which is located in the northern part of the Horda Platform, in the footwall of the Sogn Graben boundary fault system. The well was drilled as a combined appraisal/wildcat well. The primary objective of the well was to appraise the hydrocarbon potential in the Late Jurassic Sognefjord and Fensfjord Formations, found oil and gas bearing in the 35/9-1 well. Secondary objective was to test the Middle -Early Jurassic sequence.
    The total depth of the well was prognosed to 2830 m RKB, approximately 30 m into the Caledonian basement.
    Operations and results
    Wildcat/Appraisal well 35/9-2 was spudded with the semi-submersible installation Vildkat Explorer on 1 January 1991 and drilled to TD at 2885 m in Caledonian basement. Due to hole angle problems, the well had to be re-spudded twice before drilling proceeded. No shallow gas or boulders were observed while drilling. In order to penetrate the target within the given tolerances, a kick-off was made at 1039 m. This resulted in a deviation of up to 14 deg. at 1287 m and TVD 8 m less than measured depth at final TD. The well was drilled with seawater and hi-vis pills down to 1018 m and with KCl/polymer from 1018 m to TD.
    The well encountered oil and gas bearing sandstones from 2095 m in the Late Jurassic reservoirs. The gas/oil contact was found at 2324 m and oil was found down to 2341 m in the Fensfjord "C" Formation. Net pay gas zone was calculated to 171.26 m and net oil pay zone calculated to 13.13 m. The oil/water contact was not seen, but from extrapolation of RFT pressure gradients the OWC was estimated at 2367 m in the Fensfjord Formation. The best reservoir sand was found in the Sognefjord Formation. The Middle and Early Jurassic formations were penetrated and found water bearing. Above the Late Jurassic reservoirs only two weak shows were recorded in cuttings from thin sandstone stringers in the Tryggvason Formation. Weak patchy shows were recorded in the Fensford Formation at 2366 m to 2379 m, otherwise no shows were seen below OWC of the Late Jurassic reservoirs.
    Nine cores were cut in the Viking Group, 3 in the Brent Group and 5 in the Dunlin Group. RFT fluid samples were taken at 2368.6 m (water and filtrate with small volume of gas), and at 2331.5 m (6.5 l oil and 0.81 Sm3 gas).
    The well was permanently abandoned on 3 April 1991 as a gas/oil discovery.
    Testing
    Four production tests were performed in the Late Jurassic Formations, one oil test and three gas tests. Production test data quoted below refer to maximum rates at the specified choke sizes.
    Production test No. 1 was performed in the interval 2329.9 - 2342.4 m in the Fensfjord "C" Formation. It flowed oil at 289 Sm3/d and gas at 206300 Sm3/d on a 12.7 mm choke. The GOR was 714 Sm3/Sm3. The oil gravity was 0.826 g/cc and the gas gravity was 0.608 (air=l). The wellhead pressure was 144.4 bars with a wellhead temperature of 44.6 deg C. The well produced 0.6% CO2 and no H2S. Bottom hole temperature was 83.8 deg C.
    Production test No. 2 was performed in the interval 2295.5 - 2310.5 in the Fensfjord "C" Formation. It flowed condensate at 206. Sm3/d and gas at 881000 Sm3/d on a 25.4 mm choke. The GOR was 4276 Sm3/Sm3. The condensate density was 0.720 g/cc and the gas gravity was 0.668 (air=l). The wellhead pressure was 112.7 bars and the temperature was 47.3 deg C. The well produced 0.5% CO2 and no H2S. Bottom hole temperature was 83.2 deg C.
    Production test No. 3 was performed in the interval 2187.2 - 2211.2 Fensfjord "D" Formation. It flowed condensate at 206 Sm3/d and gas at 803000 Sm3/d on a 25.4 mm choke. The GOR was 3897 Sm3/Sm3. The condensate density was 0.732 g/cc and the gas gravity was 0.664 (air=l). The wellhead pressure was 106.6 bars and the temperature was 43.3 deg C. The well produced 0.5% CO2 and no H2S. Bottom hole temperature was 79.3 deg C.
    Production test No. 4 was performed in the interval 2100.6 - 2130.6 m in the Sognefjord Formation. It flowed condensate at 202 Sm3/d and gas at 954000 Sm3/d on a 25.4 mm choke. The GOR was 4717 Sm3/Sm3. The condensate density was 0.726 g/cc and the gas gravity was 0.664 (air=l). The wellhead pressure was 118.8 bars and the temperature was 43.8 deg C. The well produced 0.5% CO2 and no H2S. Bottom hole temperature was 76.7 deg C.
  • 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]
    1020.00
    2885.00
  • 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
    2110.5
    2111.2
    [m ]
    2
    2114.0
    2141.9
    [m ]
    3
    2271.0
    2299.0
    [m ]
    4
    2299.0
    2327.0
    [m ]
    5
    2327.0
    2350.2
    [m ]
    6
    2365.0
    2391.9
    [m ]
    7
    2393.0
    2421.0
    [m ]
    8
    2483.0
    2520.6
    [m ]
    9
    2520.6
    2554.3
    [m ]
    10
    2621.0
    2638.6
    [m ]
    11
    2638.6
    2665.6
    [m ]
    12
    2666.0
    2694.0
    [m ]
    13
    2694.0
    2722.3
    [m ]
    14
    2722.3
    2759.0
    [m ]
    15
    2759.8
    2763.0
    [m ]
    16
    2764.5
    2778.0
    [m ]
    17
    2778.3
    2784.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    394.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 2110-2111m
    Core photo at depth: 2114-2119m
    Core photo at depth: 2119-2124m
    Core photo at depth: 2124-2129m
    Core photo at depth: 2129-2134m
    2110-2111m
    2114-2119m
    2119-2124m
    2124-2129m
    2129-2134m
    Core photo at depth: 2134-2139m
    Core photo at depth: 2139-2141m
    Core photo at depth: 2271-2276m
    Core photo at depth: 2276-2281m
    Core photo at depth: 2281-2286m
    2134-2139m
    2139-2141m
    2271-2276m
    2276-2281m
    2281-2286m
    Core photo at depth: 2286-2291m
    Core photo at depth: 2291-2296m
    Core photo at depth: 2296-2299m
    Core photo at depth: 2299-2304m
    Core photo at depth: 2304-2309m
    2286-2291m
    2291-2296m
    2296-2299m
    2299-2304m
    2304-2309m
    Core photo at depth: 2309-2314m
    Core photo at depth: 2314-2319m
    Core photo at depth: 2319-2324m
    Core photo at depth: 2324-2327m
    Core photo at depth: 2327-2332m
    2309-2314m
    2314-2319m
    2319-2324m
    2324-2327m
    2327-2332m
    Core photo at depth: 2332-2337m
    Core photo at depth: 2337-2342m
    Core photo at depth: 2342-2347m
    Core photo at depth: 2347-2350m
    Core photo at depth: 2365-2370m
    2332-2337m
    2337-2342m
    2342-2347m
    2347-2350m
    2365-2370m
    Core photo at depth: 2370-2375m
    Core photo at depth: 2375-2380m
    Core photo at depth: 2380-2385m
    Core photo at depth: 2385-2390m
    Core photo at depth: 2390-2391m
    2370-2375m
    2375-2380m
    2380-2385m
    2385-2390m
    2390-2391m
    Core photo at depth: 2393-2398m
    Core photo at depth: 2398-2403m
    Core photo at depth: 2403-2408m
    Core photo at depth: 2408-2413m
    Core photo at depth: 2413-2418m
    2393-2398m
    2398-2403m
    2403-2408m
    2408-2413m
    2413-2418m
    Core photo at depth: 2418-2421m
    Core photo at depth: 2483-2488m
    Core photo at depth: 2488-2493m
    Core photo at depth: 2493-2498m
    Core photo at depth: 2498-2503m
    2418-2421m
    2483-2488m
    2488-2493m
    2493-2498m
    2498-2503m
    Core photo at depth: 2503-2508m
    Core photo at depth: 2508-2513m
    Core photo at depth: 2513-2518m
    Core photo at depth: 2518-2510m
    Core photo at depth: 2520-2525m
    2503-2508m
    2508-2513m
    2513-2518m
    2518-2510m
    2520-2525m
    Core photo at depth: 2525-2530m
    Core photo at depth: 2530-2535m
    Core photo at depth: 2535-2540m
    Core photo at depth: 2540-2545m
    Core photo at depth: 2545-2550m
    2525-2530m
    2530-2535m
    2535-2540m
    2540-2545m
    2545-2550m
    Core photo at depth: 2550-2554m
    Core photo at depth: 2621-2626m
    Core photo at depth: 2626-2631m
    Core photo at depth: 2631-2636m
    Core photo at depth: 2636-2638m
    2550-2554m
    2621-2626m
    2626-2631m
    2631-2636m
    2636-2638m
    Core photo at depth: 2638-2643m
    Core photo at depth: 2643-2648m
    Core photo at depth: 2648-2653m
    Core photo at depth: 2653-2658m
    Core photo at depth: 2658-2663m
    2638-2643m
    2643-2648m
    2648-2653m
    2653-2658m
    2658-2663m
    Core photo at depth: 2663-2665m
    Core photo at depth: 2666-2671m
    Core photo at depth: 2671-2676m
    Core photo at depth: 2676-2681m
    Core photo at depth: 2681-2686m
    2663-2665m
    2666-2671m
    2671-2676m
    2676-2681m
    2681-2686m
    Core photo at depth: 2686-2691m
    Core photo at depth: 2691-2694m
    Core photo at depth: 2694-2699m
    Core photo at depth: 2704-2709m
    Core photo at depth: 2709-2714m
    2686-2691m
    2691-2694m
    2694-2699m
    2704-2709m
    2709-2714m
    Core photo at depth: 2714-2719m
    Core photo at depth: 2719-2722m
    Core photo at depth: 2722-2727m
    Core photo at depth: 2727-2732m
    Core photo at depth: 2732-2737m
    2714-2719m
    2719-2722m
    2722-2727m
    2727-2732m
    2732-2737m
    Core photo at depth: 2737-2742m
    Core photo at depth: 2742-2747m
    Core photo at depth: 2747-2752m
    Core photo at depth: 2752-2757m
    Core photo at depth: 2757-2759m
    2737-2742m
    2742-2747m
    2747-2752m
    2752-2757m
    2757-2759m
    Core photo at depth: 2759-2763m
    Core photo at depth: 2764-2769m
    Core photo at depth: 2769-2774m
    Core photo at depth: 2774-2778m
    Core photo at depth: 2778-2783m
    2759-2763m
    2764-2769m
    2769-2774m
    2774-2778m
    2778-2783m
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1020.0
    [m]
    DC
    RRI
    1035.5
    [m]
    SWC
    HYDRO
    1050.0
    [m]
    DC
    RRI
    1100.0
    [m]
    DC
    RRI
    1110.0
    [m]
    DC
    RRI
    1130.0
    [m]
    DC
    RRI
    1140.0
    [m]
    DC
    RRI
    1150.0
    [m]
    SWC
    HYDRO
    1170.0
    [m]
    DC
    RRI
    1190.0
    [m]
    DC
    RRI
    1230.0
    [m]
    DC
    RRI
    1250.0
    [m]
    DC
    RRI
    1260.5
    [m]
    SWC
    HYDRO
    1273.0
    [m]
    SWC
    HYDRO
    1290.2
    [m]
    SWC
    HYDRO
    1304.2
    [m]
    SWC
    HYDRO
    1310.5
    [m]
    SWC
    HYDRO
    1321.0
    [m]
    SWC
    HYDRO
    1329.5
    [m]
    SWC
    HYDRO
    1337.5
    [m]
    SWC
    HYDRO
    1348.5
    [m]
    SWC
    HYDRO
    1359.5
    [m]
    SWC
    HYDRO
    1380.0
    [m]
    DC
    RRI
    1400.0
    [m]
    DC
    RRI
    1410.0
    [m]
    DC
    RRI
    1430.0
    [m]
    DC
    RRI
    1440.0
    [m]
    DC
    RRI
    1460.0
    [m]
    DC
    RRI
    1470.0
    [m]
    DC
    RRI
    1490.0
    [m]
    DC
    RRI
    1498.6
    [m]
    SWC
    HYDRO
    1520.0
    [m]
    DC
    RRI
    1530.0
    [m]
    DC
    RRI
    1550.0
    [m]
    DC
    RRI
    1560.0
    [m]
    DC
    RRI
    1580.0
    [m]
    DC
    RRI
    1590.0
    [m]
    DC
    RRI
    1605.0
    [m]
    DC
    RRI
    1620.0
    [m]
    DC
    RRI
    1635.0
    [m]
    DC
    RRI
    1650.0
    [m]
    DC
    RRI
    1665.0
    [m]
    DC
    RRI
    1680.0
    [m]
    DC
    RRI
    1700.0
    [m]
    SWC
    HYDRO
    1710.0
    [m]
    DC
    RRI
    1730.0
    [m]
    DC
    RRI
    1740.0
    [m]
    DC
    RRI
    1755.0
    [m]
    DC
    RRI
    1770.0
    [m]
    DC
    RRI
    1785.0
    [m]
    DC
    RRI
    1800.0
    [m]
    DC
    RRI
    1815.0
    [m]
    DC
    RRI
    1830.0
    [m]
    SWC
    HYDRO
    1845.0
    [m]
    DC
    RRI
    1878.8
    [m]
    SWC
    HYDRO
    1890.0
    [m]
    SWC
    HYDRO
    1892.0
    [m]
    SWC
    HYDRO
    1910.5
    [m]
    SWC
    HYDRO
    1926.2
    [m]
    SWC
    HYDRO
    1937.0
    [m]
    DC
    RRI
    1945.0
    [m]
    SWC
    HYDRO
    1952.0
    [m]
    DC
    RRI
    1970.0
    [m]
    SWC
    HYDRO
    1984.0
    [m]
    SWC
    HYDRO
    1990.0
    [m]
    SWC
    HYDRO
    2010.0
    [m]
    SWC
    HYDRO
    2013.0
    [m]
    SWC
    HYDRO
    2020.5
    [m]
    SWC
    HYDRO
    2025.0
    [m]
    DC
    RRI
    2030.0
    [m]
    SWC
    HYDRO
    2035.0
    [m]
    DC
    RRI
    2042.5
    [m]
    SWC
    HYDRO
    2047.0
    [m]
    DC
    RRI
    2050.0
    [m]
    SWC
    HYDRO
    2053.0
    [m]
    SWC
    HYDRO
    2057.0
    [m]
    DC
    RRI
    2063.0
    [m]
    SWC
    HYDRO
    2067.0
    [m]
    SWC
    HYDRO
    2085.0
    [m]
    SWC
    HYDRO
    2088.0
    [m]
    SWC
    HYDRO
    2094.0
    [m]
    SWC
    HYDRO
    2110.5
    [m]
    C
    RRI
    2128.0
    [m]
    C
    RRI
    2129.0
    [m]
    C
    RRI
    2138.0
    [m]
    C
    RRI
    2141.0
    [m]
    C
    RRI
    2159.0
    [m]
    SWC
    HYDRO
    2170.0
    [m]
    DC
    RRI
    2174.0
    [m]
    SWC
    FUGRO
    2179.0
    [m]
    SWC
    HYDRO
    2187.5
    [m]
    SWC
    HYDRO
    2190.0
    [m]
    DC
    FUGRO
    2192.0
    [m]
    DC
    FUGRO
    2195.0
    [m]
    DC
    FUGRO
    2197.0
    [m]
    DC
    FUGRO
    2197.0
    [m]
    SWC
    FUGRO
    2197.0
    [m]
    SWC
    HYDRO
    2200.0
    [m]
    DC
    FUGRO
    2202.0
    [m]
    DC
    FUGRO
    2205.0
    [m]
    DC
    FUGRO
    2205.0
    [m]
    SWC
    FUGRO
    2205.0
    [m]
    SWC
    HYDRO
    2207.0
    [m]
    DC
    FUGRO
    2210.0
    [m]
    DC
    FUGRO
    2212.0
    [m]
    DC
    FUGRO
    2212.5
    [m]
    C
    FUGRO
    2212.5
    [m]
    SWC
    HYDRO
    2215.0
    [m]
    DC
    FUGRO
    2217.0
    [m]
    DC
    FUGRO
    2220.0
    [m]
    DC
    FUGRO
    2222.0
    [m]
    DC
    FUGRO
    2225.0
    [m]
    DC
    FUGRO
    2227.0
    [m]
    DC
    FUGRO
    2228.0
    [m]
    SWC
    HYDRO
    2230.0
    [m]
    DC
    FUGRO
    2232.0
    [m]
    DC
    FUGRO
    2235.0
    [m]
    DC
    FUGRO
    2237.0
    [m]
    DC
    FUGRO
    2240.0
    [m]
    DC
    FUGRO
    2242.0
    [m]
    DC
    FUGRO
    2243.5
    [m]
    C
    FUGRO
    2245.0
    [m]
    DC
    FUGRO
    2246.0
    [m]
    C
    FUGRO
    2246.0
    [m]
    SWC
    HYDRO
    2247.0
    [m]
    DC
    FUGRO
    2250.0
    [m]
    DC
    FUGRO
    2252.0
    [m]
    DC
    FUGRO
    2255.0
    [m]
    DC
    FUGRO
    2257.0
    [m]
    DC
    FUGRO
    2257.5
    [m]
    C
    FUGRO
    2257.5
    [m]
    SWC
    HYDRO
    2260.0
    [m]
    DC
    FUGRO
    2262.0
    [m]
    DC
    FUGRO
    2265.0
    [m]
    DC
    FUGRO
    2267.0
    [m]
    DC
    FUGRO
    2270.0
    [m]
    DC
    FUGRO
    2272.0
    [m]
    C
    ROBERTSO
    2282.6
    [m]
    C
    FUGRO
    2287.0
    [m]
    C
    ROBERTSO
    2287.1
    [m]
    C
    FUGRO
    2292.0
    [m]
    C
    FUGRO
    2302.8
    [m]
    C
    FUGRO
    2304.0
    [m]
    C
    ROBERTSO
    2306.4
    [m]
    C
    FUGRO
    2310.9
    [m]
    C
    FUGRO
    2315.0
    [m]
    C
    ROBERTSO
    2316.7
    [m]
    C
    FUGRO
    2319.5
    [m]
    C
    FUGRO
    2322.8
    [m]
    C
    FUGRO
    2323.0
    [m]
    C
    ROBERTSO
    2325.6
    [m]
    C
    FUGRO
    2326.7
    [m]
    C
    FUGRO
    2329.7
    [m]
    C
    FUGRO
    2332.9
    [m]
    C
    FUGRO
    2333.0
    [m]
    C
    ROBERTSO
    2338.8
    [m]
    C
    FUGRO
    2340.0
    [m]
    C
    ROBERTSO
    2349.0
    [m]
    C
    ROBERT
    2349.9
    [m]
    C
    FUGRO
    2365.0
    [m]
    C
    ROBERTSO
    2369.7
    [m]
    C
    FUGRO
    2373.0
    [m]
    C
    ROBERTSO
    2380.5
    [m]
    C
    FUGRO
    2382.0
    [m]
    C
    ROBERTSO
    2387.7
    [m]
    C
    FUGRO
    2388.0
    [m]
    C
    ROBERTSO
    2390.9
    [m]
    C
    ROBERTSO
    2392.0
    [m]
    C
    ROBERT
    2398.0
    [m]
    C
    ROBERTSO
    2398.3
    [m]
    C
    FUGRO
    2399.5
    [m]
    C
    FUGRO
    2401.3
    [m]
    C
    FUGRO
    2408.0
    [m]
    C
    ROBERTSO
    2408.6
    [m]
    C
    FUGRO
    2411.8
    [m]
    C
    FUGRO
    2415.3
    [m]
    C
    FUGRO
    2418.9
    [m]
    C
    FUGRO
    2420.0
    [m]
    C
    ROBERTSO
    2420.6
    [m]
    C
    FUGRO
    2422.0
    [m]
    DC
    FUGRO
    2425.0
    [m]
    DC
    FUGRO
    2427.0
    [m]
    DC
    FUGRO
    2430.0
    [m]
    DC
    FUGRO
    2432.0
    [m]
    DC
    FUGRO
    2435.0
    [m]
    DC
    FUGRO
    2437.0
    [m]
    DC
    FUGRO
    2437.0
    [m]
    C
    FUGRO
    2437.0
    [m]
    SWC
    HYDRO
    2440.0
    [m]
    DC
    FUGRO
    2442.0
    [m]
    DC
    FUGRO
    2445.0
    [m]
    DC
    FUGRO
    2447.0
    [m]
    DC
    FUGRO
    2450.0
    [m]
    DC
    FUGRO
    2452.0
    [m]
    DC
    FUGRO
    2455.0
    [m]
    DC
    FUGRO
    2457.0
    [m]
    DC
    FUGRO
    2457.0
    [m]
    C
    FUGRO
    2457.0
    [m]
    SWC
    HYDRO
    2460.0
    [m]
    DC
    FUGRO
    2462.0
    [m]
    DC
    FUGRO
    2465.0
    [m]
    DC
    FUGRO
    2467.0
    [m]
    DC
    FUGRO
    2470.0
    [m]
    DC
    FUGRO
    2472.0
    [m]
    DC
    FUGRO
    2475.0
    [m]
    DC
    FUGRO
    2477.0
    [m]
    DC
    FUGRO
    2477.0
    [m]
    C
    FUGRO
    2480.0
    [m]
    DC
    FUGRO
    2482.0
    [m]
    DC
    FUGRO
    2484.0
    [m]
    C
    ROBERTSO
    2485.0
    [m]
    DC
    FUGRO
    2487.0
    [m]
    DC
    FUGRO
    2487.1
    [m]
    C
    FUGRO
    2489.0
    [m]
    C
    ROBERTSO
    2489.2
    [m]
    C
    FUGRO
    2490.0
    [m]
    DC
    FUGRO
    2498.6
    [m]
    C
    FUGRO
    2501.0
    [m]
    C
    ROBERTSO
    2502.2
    [m]
    C
    FUGRO
    2511.0
    [m]
    C
    ROBERTSO
    2511.2
    [m]
    C
    FUGRO
    2514.5
    [m]
    C
    FUGRO
    2515.3
    [m]
    C
    FUGRO
    2516.2
    [m]
    C
    FUGRO
    2517.6
    [m]
    C
    FUGRO
    2519.2
    [m]
    C
    FUGRO
    2520.5
    [m]
    C
    FUGRO
    2521.0
    [m]
    C
    HYDRO
    2524.0
    [m]
    C
    ROBERTSO
    2536.0
    [m]
    C
    ROBERT
    2541.0
    [m]
    C
    ROBERT
    2548.0
    [m]
    C
    ROBERT
    2554.3
    [m]
    C
    ROBERT
    2562.0
    [m]
    DC
    FUGRO
    2565.0
    [m]
    DC
    FUGRO
    2567.0
    [m]
    DC
    FUGRO
    2567.5
    [m]
    C
    FUGRO
    2567.5
    [m]
    SWC
    HYDRO
    2570.0
    [m]
    DC
    ROBERTSO
    2572.0
    [m]
    DC
    FUGRO
    2575.0
    [m]
    DC
    FUGRO
    2577.0
    [m]
    DC
    FUGRO
    2578.0
    [m]
    SWC
    HYDRO
    2580.0
    [m]
    DC
    FUGRO
    2582.0
    [m]
    DC
    FUGRO
    2585.0
    [m]
    DC
    FUGRO
    2587.0
    [m]
    DC
    FUGRO
    2588.0
    [m]
    SWC
    HYDRO
    2590.0
    [m]
    DC
    FUGRO
    2590.0
    [m]
    DC
    ROBERTSO
    2592.0
    [m]
    DC
    FUGRO
    2595.0
    [m]
    DC
    FUGRO
    2600.0
    [m]
    DC
    FUGRO
    2600.0
    [m]
    DC
    ROBERTSO
    2602.0
    [m]
    DC
    FUGRO
    2605.0
    [m]
    DC
    FUGRO
    2606.5
    [m]
    SWC
    HYDRO
    2607.0
    [m]
    DC
    FUGRO
    2610.0
    [m]
    DC
    FUGRO
    2612.0
    [m]
    DC
    FUGRO
    2613.0
    [m]
    C
    FUGRO
    2613.0
    [m]
    SWC
    HYDRO
    2615.0
    [m]
    DC
    FUGRO
    2617.0
    [m]
    DC
    FUGRO
    2620.0
    [m]
    DC
    FUGRO
    2621.8
    [m]
    C
    HYDRO
    2624.6
    [m]
    C
    HYDRO
    2627.1
    [m]
    C
    HYDRO
    2629.9
    [m]
    C
    HYDRO
    2630.0
    [m]
    DC
    ROBERTSO
    2632.7
    [m]
    C
    HYDRO
    2633.9
    [m]
    C
    HYDRO
    2634.5
    [m]
    C
    HYDRO
    2636.1
    [m]
    C
    HYDRO
    2640.0
    [m]
    DC
    ROBERTSO
    2654.1
    [m]
    C
    HYDRO
    2657.2
    [m]
    C
    HYDRO
    2662.6
    [m]
    C
    HYDRO
    2663.1
    [m]
    C
    HYDRO
    2664.8
    [m]
    C
    HYDRO
    2667.7
    [m]
    C
    HYDRO
    2670.9
    [m]
    C
    HYDRO
    2672.9
    [m]
    C
    HYDRO
    2674.8
    [m]
    C
    HYDRO
    2676.8
    [m]
    C
    HYDRO
    2679.6
    [m]
    C
    HYDRO
    2682.5
    [m]
    C
    HYDRO
    2682.6
    [m]
    C
    HYDRO
    2685.5
    [m]
    C
    HYDRO
    2688.5
    [m]
    C
    HYDRO
    2690.0
    [m]
    DC
    ROBERTSO
    2691.6
    [m]
    C
    HYDRO
    2694.4
    [m]
    C
    HYDRO
    2694.4
    [m]
    C
    HYDRO
    2697.3
    [m]
    C
    HYDRO
    2699.2
    [m]
    C
    HYDRO
    2700.0
    [m]
    DC
    ROBERTSO
    2700.1
    [m]
    C
    HYDRO
    2702.4
    [m]
    C
    HYDRO
    2712.5
    [m]
    C
    HYDRO
    2712.6
    [m]
    C
    HYDRO
    2716.5
    [m]
    C
    HYDRO
    2719.8
    [m]
    C
    HYDRO
    2720.4
    [m]
    C
    HYDRO
    2724.3
    [m]
    C
    HYDRO
    2733.4
    [m]
    C
    HYDRO
    2740.0
    [m]
    DC
    ROBERTSO
    2742.6
    [m]
    C
    HYDRO
    2750.0
    [m]
    DC
    ROBERTSO
    2750.6
    [m]
    C
    HYDRO
    2759.9
    [m]
    C
    HYDRO
    2770.0
    [m]
    DC
    ROBERTSO
    2772.0
    [m]
    DC
    ROBERT
    2776.7
    [m]
    C
    HYDRO
    2779.5
    [m]
    C
    HYDRO
    2783.7
    [m]
    C
    HYDRO
    2785.0
    [m]
    DC
    ROBERTSO
    2789.5
    [m]
    SWC
    HYDRO
    2789.5
    [m]
    SWC
    HYDRO
    2805.0
    [m]
    SWC
    HYDRO
    2813.0
    [m]
    SWC
    HYDRO
  • Oil samples at the Norwegian Offshore Directorate

    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    TEST-1
    2342.00
    2330.00
    23.02.1991 - 02:45
    YES
    DST
    TEST-2
    2295.50
    2310.50
    11.03.1991 - 03:55
    YES
    DST
    TEST-3
    2187.20
    2211.20
    CONDENSATE
    19.03.1991 - 02:25
    YES
    DST
    TEST- 4
    2130.00
    2100.00
    CONDENSATE
    27.03.1991 - 16:00
    YES
  • Lithostratigraphy

  • Geochemical information

    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.72
  • 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
    24.25
  • Drill stem tests (DST)

    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2330
    2342
    12.7
    2.0
    2295
    2310
    25.4
    3.0
    2187
    2211
    25.4
    4.0
    2100
    2130
    25.4
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    14.400
    83
    2.0
    11.200
    3.0
    10.600
    4.0
    11.900
    Drill stem tests (DST)
    Test number
    Oil
    [Sm3/day]
    Gas
    [Sm3/day]
    Oil density
    [g/cm3]
    Gas grav. rel.air
    GOR
    [m3/m3]
    1.0
    289
    2063000
    0.826
    0.608
    714
    2.0
    206
    881000
    0.720
    0.668
    4276
    3.0
    205
    803000
    0.732
    0.664
    3897
    4.0
    202
    954000
    0.726
    0.664
    4717
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST GR
    1035
    1952
    CST GR
    1962
    2813
    DIL BHC GR SP
    1003
    1950
    DIL DITE GR SP AMS
    1937
    2884
    DIL GR SP
    392
    614
    DLL MSFL GR SP AMS
    2075
    2400
    DSI NGS
    1895
    2887
    FMS4 GR
    1937
    2887
    LDL CNL GR
    1937
    2884
    LDL GR
    1003
    1950
    MWD LWD - GR RES DIR
    392
    2885
    RFT AMS
    2103
    2835
    RFT AMS
    2367
    2368
    VSP GR
    1280
    2870
  • 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
    477.0
    36
    479.0
    0.00
    LOT
    INTERM.
    13 3/8
    1003.0
    17 1/2
    1018.0
    1.37
    LOT
    INTERM.
    9 5/8
    1939.0
    12 1/4
    1953.0
    1.40
    LOT
    LINER
    7
    2434.0
    8 1/2
    2885.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    464
    1.20
    1.0
    1.0
    WATER BASED
    03.01.1991
    477
    1.20
    1.0
    1.0
    WATER BASED
    07.01.1991
    477
    1.20
    1.0
    1.0
    WATER BASED
    03.01.1991
    478
    1.05
    1.0
    1.0
    WATER BASED
    08.01.1991
    478
    1.05
    1.0
    1.0
    WATER BASED
    09.01.1991
    479
    1.05
    1.0
    1.0
    WATER BASED
    11.01.1991
    1018
    1.05
    1.0
    1.0
    WATER BASED
    14.01.1991
    1018
    1.11
    19.0
    14.0
    WATER BASED
    14.01.1991
    1018
    1.12
    19.0
    14.0
    WATER BASED
    14.01.1991
    1060
    1.12
    10.0
    7.0
    WATER BASED
    15.01.1991
    1297
    1.13
    11.0
    11.0
    WATER BASED
    16.01.1991
    1310
    1.14
    10.0
    11.0
    WATER BASED
    17.01.1991
    1336
    1.18
    11.0
    10.0
    WATER BASED
    18.01.1991
    1646
    1.19
    8.0
    12.0
    WATER BASED
    21.01.1991
    1759
    1.20
    15.0
    11.0
    WATER BASED
    21.01.1991
    1918
    1.20
    15.0
    11.0
    WATER BASED
    21.01.1991
    1953
    1.22
    14.0
    10.0
    WATER BASED
    23.01.1991
    1953
    1.22
    16.0
    11.0
    WATER BASED
    25.01.1991
    2106
    1.22
    14.0
    11.0
    WATER BASED
    25.01.1991
    2111
    1.23
    15.0
    9.0
    WATER BASED
    29.01.1991
    2142
    1.22
    16.0
    11.0
    WATER BASED
    29.01.1991
    2181
    1.22
    10.0
    6.0
    WATER BASED
    26.03.1991
    2181
    1.22
    10.0
    6.0
    WATER BASED
    26.03.1991
    2181
    1.22
    10.0
    6.0
    WATER BASED
    27.03.1991
    2181
    1.22
    10.0
    6.0
    WATER BASED
    26.03.1991
    2272
    1.22
    13.0
    12.0
    WATER BASED
    29.01.1991
    2293
    1.22
    9.0
    8.0
    WATER BASED
    18.03.1991
    2293
    1.22
    9.0
    8.0
    WATER BASED
    18.03.1991
    2293
    1.22
    10.0
    6.0
    WATER BASED
    20.03.1991
    2293
    1.22
    10.0
    6.0
    WATER BASED
    20.03.1991
    2293
    1.22
    10.0
    6.0
    WATER BASED
    21.03.1991
    2293
    1.22
    10.0
    6.0
    WATER BASED
    22.03.1991
    2293
    1.22
    10.0
    6.0
    WATER BASED
    26.03.1991
    2311
    1.22
    10.0
    7.0
    WATER BASED
    15.03.1991
    2311
    1.22
    10.0
    7.0
    WATER BASED
    18.03.1991
    2311
    1.22
    10.0
    7.0
    WATER BASED
    15.03.1991
    2311
    1.22
    10.0
    7.0
    WATER BASED
    13.03.1991
    2311
    1.22
    10.0
    7.0
    WATER BASED
    14.03.1991
    2327
    1.22
    13.0
    11.0
    WATER BASED
    30.01.1991
    2350
    1.22
    13.0
    10.0
    WATER BASED
    30.01.1991
    2382
    1.22
    10.0
    8.0
    WATER BASED
    05.03.1991
    2382
    1.22
    8.0
    8.0
    WATER BASED
    05.03.1991
    2382
    1.22
    9.0
    7.0
    WATER BASED
    05.03.1991
    2382
    1.22
    9.0
    7.0
    WATER BASED
    06.03.1991
    2382
    1.22
    8.0
    7.0
    WATER BASED
    07.03.1991
    2382
    1.22
    8.0
    7.0
    WATER BASED
    08.03.1991
    2393
    1.22
    12.0
    10.0
    WATER BASED
    31.01.1991
    2421
    1.22
    15.0
    10.0
    WATER BASED
    01.02.1991
    2434
    1.22
    12.0
    8.0
    WATER BASED
    19.02.1991
    2434
    1.22
    12.0
    6.0
    WATER BASED
    19.02.1991
    2434
    1.22
    12.0
    6.0
    WATER BASED
    20.02.1991
    2436
    1.22
    13.0
    5.0
    WATER BASED
    19.02.1991
    2436
    1.22
    13.0
    5.0
    WATER BASED
    19.02.1991
    2436
    1.22
    10.0
    8.0
    WATER BASED
    01.03.1991
    2483
    1.22
    11.0
    9.0
    WATER BASED
    05.02.1991
    2537
    1.22
    12.0
    8.0
    WATER BASED
    05.02.1991
    2564
    1.22
    12.0
    9.0
    WATER BASED
    05.02.1991
    2621
    1.22
    13.0
    8.0
    WATER BASED
    05.02.1991
    2666
    1.22
    12.0
    10.0
    WATER BASED
    06.02.1991
    2694
    1.22
    12.0
    11.0
    WATER BASED
    07.02.1991
    2732
    1.22
    13.0
    10.0
    WATER BASED
    08.02.1991
    2732
    1.22
    13.0
    10.0
    WATER BASED
    08.02.1991
    2765
    1.22
    13.0
    9.0
    WATER BASED
    12.02.1991
    2778
    1.22
    11.0
    11.0
    WATER BASED
    12.02.1991
    2856
    1.22
    12.0
    11.0
    WATER BASED
    12.02.1991
    2885
    1.22
    13.0
    10.0
    WATER BASED
    12.02.1991
    2885
    1.22
    13.0
    10.0
    WATER BASED
    13.02.1991
    2885
    1.22
    13.0
    10.0
    WATER BASED
    14.02.1991
    2885
    1.22
    12.0
    10.0
    WATER BASED
    15.02.1991
    3436
    1.22
    12.0
    6.0
    WATER BASED
    21.02.1991
    3436
    1.22
    12.0
    6.0
    WATER BASED
    22.02.1991
    3436
    1.22
    12.0
    6.0
    WATER BASED
    26.02.1991
    3436
    1.22
    12.0
    6.0
    WATER BASED
    26.02.1991
    3436
    1.22
    11.0
    6.0
    WATER BASED
    26.02.1991
    3436
    1.22
    11.0
    6.0
    WATER BASED
    26.02.1991
    3436
    1.22
    10.0
    8.0
    WATER BASED
    27.02.1991
    3436
    1.22
    10.0
    8.0
    WATER BASED
    28.02.1991
  • Thin sections at the Norwegian Offshore Directorate

    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    2508.46
    [m ]
    2506.50
    [m ]
    2490.45
    [m ]
    2380.23
    [m ]
    2366.49
    [m ]
    2334.50
    [m ]
    2326.48
    [m ]
    2306.25
    [m ]
    2301.50
    [m ]
    2282.75
    [m ]
    2273.50
    [m ]
    2132.42
    [m ]
    2127.72
    [m ]
    2111.05
    [m ]
    2278.50
    [m ]
    2639.28
    [m ]
    2698.10
    [m ]
    2707.08
    [m ]
    2715.62
    [m ]
  • 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
    0.23