NORWAY · WELLBORES · NPDID 327
15/9-8
Exploration · Appraisal · P&A · Gas/condensate · Den norske stats oljeselskap a.s · Sleipner Vest · PL 046
15/9-8 is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Mar 5, 1981, to 3,730 m in the Smith Bank Fm.
Discovery 15/6-3 Sleipner Vest · On the map →
- 3,730
- m total depth · 3,729 m vertical
- 103
- m water depth
- Mar 5, 1981
- entered · completed May 25, 1981
- Smith Bank Fm
- at total depth · Triassic
- 45
- m of core in 4 cores
- 128
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED MAY 25, 1983
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- NORTRYM · Semisub steel
- Drilling days
- 82
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 2.75°
- Drilling permit
- 279-L
- Licensing round
- 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 58.38217° N, 1.77453° E
- Hydrocarbons in
- Hugin Fm · Middle Jurassic
- Hydrocarbons in
- Sleipner Fm · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 15/9-8 was drilled on the Delta structure in the southeastern part of the Sleipner West Field in the North Sea. The primary objective was to delineate the hydrocarbon accumulation encountered in the 15/9-4 well on the same structure, and to get further information about the sand distribution in the area. The primary target was Callovian sandstones. Paleocene sandstone was the secondary target.
Operations and results
Appraisal well 15/9-8 was spudded with the semi-submersible installation Nortrym on 5 March 1981 and drilled to TD at 3730 m in the Triassic Smith Bank Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 495 m, with gypsum/polymer mud from 495 m to 2845 m, and with a gel/lignosulphonate mud from m 2845 m to TD.
The sandstones in Paleocene were water bearing. Top of the Callovian sandstone, Hugin Formation, was encountered at 3446 m, while top Sleipner Formation was encountered at 3493 m. Bothe formations proved to be gas/condensate bearing with a gas-water contact at 3564 m based on pressure gradients and well logs. No shows were recorded outside of the hydrocarbon bearing Hugin and Sleipner Formation.
A total of 46.5 m core was recovered in four cores from the interval 3448 to 3499 m. Segregated RFT fluid samples were taken at 3460 m (gas, condensate and mud filtrate), 3561.5 m (gas, condensate and mud filtrate), and 3566.5 m (mud filtrate and a smaller quantity of gas).
The well was permanently abandoned on 25 May 1981 as a gas/condensate appraisal well.
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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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