NORWAY · WELLBORES · NPDID 3334
15/9-21 S
Exploration · Appraisal · P&A · Shows · Den norske stats oljeselskap a.s · Sleipner Vest · PL 046
15/9-21 S is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Mar 23, 1998, to 5,126 m in the Sleipner Fm.
Discovery 15/6-3 Sleipner Vest · On the map →
- 5,126
- m total depth · 3,907 m vertical
- 108
- m water depth
- Mar 23, 1998
- entered · completed May 23, 1998
- Sleipner Fm
- at total depth · Middle Jurassic
- 94.3
- m of core in 4 cores
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED MAY 23, 2000
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- WEST EPSILON · Jack-up 3 legs
- Drilling days
- 62
- Kelly bushing elevation
- 48 m
- Maximum inclination
- 55°
- Drilling permit
- 926-L
- Licensing round
- 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 58.41793° N, 1.71794° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 15/9-21 S was drilled from the Sleipner Vest wellhead facility. The well was designed deviated to appraise the oil potential of the Hugin Formation east of the main Sleipner Vest Field. Another objective was to further appraise the Hugin Formation oil in the Sleipner Vest area, which had been discovered in well 15/9-B-4 T2.
Operations and results
The 24" section of well 15/9-21 S was spudded from the batch-set 32" conductor on 23 March 1998. Using the jack up installation West Epsilon the well was drilled to TD at 5126 m in the Middle Jurassic Sleipner Formation. No significant problems were reported from the operations. The well was drilled with PAC/seawater down to 506 m, with Aquadril KCl/glycol mud from 506 m to 3457 m, and with oil based mud from 3457 m to TD.
The target was penetrated approximately 2670 m east of the platform centre, at a depth of 4736.5 m (3592.0 m SS), 19.6 m deep to prognosis. The first 30 m of the target sandstone drilled was Intra Heather Sandstone. The Hugin Formation was penetrated at 4767 m. Only minor hydrocarbons were found. Oil shows, partly masked by the oil based mud, was observed on the cores from the Hugin Formation. The strongest shows were seen in the interval 4784 to 4798 m where oil slowly seeped from the core.
Four cores were cut from 4747 m in the Intra Heather Formation Sandstone to 4843 m in the Hugin Formation. No wire line fluid samples were taken.
The well was permanently abandoned on 23 May 1998 as a dry well.
Testing
No drill stem test was performed
Around this wellbore
This wellbore on Sodir FactPages →
About this data
Norwegian Offshore Directorate (Sodir) FactPages, mirrored nightly and used under the Norwegian Licence for Open Government Data (NLOD). Depths are metres along the wellbore from the kelly bushing unless a row gives its own unit; older cores are filed in feet. A zero the Directorate files for an unmeasured pressure, density, or temperature is shown as a dash.
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