Give whole or part of name of wellbore, licence, field, company, discovery etc. E.g. Aker, Statfjord, 24/12, ABP21014. The main content is not searched.
Official name of wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
30/9-24
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 top-hole drilling campaign covering several wellbores.
RE-CLASS TO DEV: Exploration wellbore that is reclassified to a development wellbore and given a new name.
RE-CLASS TO TEST: Exploration wellbore that is reclassified to test production and given a new name.
SUSPENDED: The drilling operation in the wellbore has been temporarily stopped. The current plan is to continue drilling later on.
WILL NEVER BE DRILLED: Wellbore registered with a name and WellID by the Norwegian Offshore Directorate, but which for various reasons will not be drilled.
ONLINE/OPERATIONAL: The wellbore is ongoing, but not completed, may be operations such as drilling, batch-drilling, logging, testing, plugging, preparation for production/injection or temporarily stopped in connection with the operations.
Name of the area on the Norwegian Continental Shelf where the wellbore is located. Legal values: BARENTS SEA, NORWEGIAN SEA, NORTH SEA.
NORTH SEA
Well name
Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
30/9-24
Seismic location
Position of spud location on seismic survey lines. SP: shotpoint.
NH05M01FINAL:inline 3454 & crossline 8687
Drilling operator
Name of the licensee starting the drilling operation on behalf of the active production license. This is usually the operator of the production license.
StatoilHydro Petroleum 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.
1272-L
Production licence at wellhead
Official designation of the production licence the wellbore was drilled or planned to be drilled from (wellhead posistion).
The active production licence of the planned drilling target of the wellbore. This can differ from the production licence the wellbore was drilled from.
Number of days from wellbore entry to wellbore completion.
38
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,
10.09.2009
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.
17.10.2009
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.
17.10.2011
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.
17.10.2011
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.
23.5
Water depth [m]
Depth in metres betweem mean sea level and sea floor.
107.5
Total depth (MD) [m RKB]
Total measured length of wellbore from kelly bushing to total depth (driller's depth).
3767.0
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).
3764.0
Maximum inclination [°]
Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
10.4
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.
LUNDE FM
Geodetic datum
Reference system for coordinates. Example of legal values: ED50.
ED50
NS degrees
Geographic coordinate of the wellhead, north-south degrees.
60° 29' 4.7'' N
EW degrees
Geographic coordinate of the wellhead, east-west degrees.
2° 42' 43.2'' E
NS UTM [m]
Universal Transverse Mercator coordinate of the wellhead, north-south.
6705578.76
EW UTM [m]
Universal Transverse Mercator coordinate of the wellhead, east-west.
Well 30/9-24 was drilled on the Omega Nord Statfjord prospect, a rotated fault block, about 6 km southwest of the Oseberg field centre. The main objective of well 30/9-24 was to prove commercial accumulation of hydrocarbon in the Nansen and Eriksson Members in the Statfjord Formation. A secondary objective was to explore the Lower Statfjord reservoir. The TD of the well was planned to be into the Hegre Group.
Operations and results
Drilling operations were done from the semi-submersible installation Transocean Leader. Based on the site survey, shallow gas could not be excluded in the interval 272 to 480 m. A pilot hole, 30/9-24 U2, was therefore drilled on 10 September 2009 to 581 m, without identifying shallow gas. After the pilot the main well was spudded and drilled with a 17 1/2" hole to 1402 m with 30" conductor at 191 m. It was not possible to run the 13 3/8" casing below 253 m and it had to be pulled. It was also observed that the guideposts /PGB had subsided 4m. The well was therefore plugged, abandoned and named 30/9-24X.
Wildcat well 30/9-24 was finally spudded on 16 September 2009, 29.4 m in direction 135.3 deg from the original location. The 30" conductor was set at 226 m and a 17 1/2" hole was drilled to 1294 m. When pulling out of the hole, the drill string got stuck at 1269 m. The string was cut at 1078 m. A cement plug was set and a 13 3/8" casing was run with shoe at 1014 m. A sidetrack, 30/9-24 T2, was then drilled from 1070 m to final TD at 3767 m in the Triassic Lunde Formation. The well was drilled with sea water and hi-vis pills down to 1294 m in the original hole, and with Versatec oil based mud in the sidetrack from kick-off at 1078 m to final TD.
The well penetrated top of the primary objective, the Nansen Member, at 3150 m, and the secondary objective Lower Statfjord at 3368 m. All reservoirs were water wet. Fluorescence and cut fluorescence, possibly due to the oil based mud, were observed just below Base Cretaceous from 2856 to 2866 m and in the Nansen and Erikson Members from 3150 to 3250 m.
As the well was dry no cores were cut and no wire line fluid samples were taken.
The well was plugged, but attempts to cut the 30" conductor from the rig failed. The rig left location on 17 October 2009. The vessel Island Valiant arrived location on 30 October to cut and retrieve the 30" conductor and the wellhead housing that was left on location after the rig left, and to retrieve pre-laid anchors. Operations were completed on 6 November 2009. Well 30/9-24 is classified as a dry well.
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