NORWAY · WELLBORES · NPDID 4147
31/4-11
Exploration · Wildcat · P&A · Oil/gas · Norsk Hydro Produksjon AS · Brage · PL 055
31/4-11 is a wildcat exploration wellbore in the North Sea, drilled by Norsk Hydro Produksjon AS, entered Jul 27, 2000, to 3,271 m in the Statfjord Gp.
Discovery 31/4-11 · On the map →
- 3,271
- m total depth · 2,765 m vertical
- 183
- m water depth
- Jul 27, 2000
- entered · completed Sep 12, 2000
- Statfjord Gp
- at total depth · Early Jurassic
- 179.4
- m of core in 16 cores
- 108
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED SEP 12, 2002
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- SCARABEO 6 · Semisub steel
- Drilling days
- 48
- Kelly bushing elevation
- 26 m
- Maximum inclination
- 58.70000076°
- Drilling permit
- 981-L
- Licensing round
- 4
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 60.61183° N, 3.10048° E
- Hydrocarbons in
- Viking Gp · Late Jurassic
- Hydrocarbons in
- Brent Gp · Middle Jurassic
- Hydrocarbons in
- Statfjord Gp · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 31/4-11 was drilled on the Bowmore structure in the northern part of the Brage Field as a combined appraisal/exploration well. The Bowmore structure is situated about 6-8 km NNE of the Brage platform. It is a NE-SW trending wedge shaped horst, rising and tapering towards the SW. The primary objective was to prove hydrocarbons in the Middle - Late Jurassic Fensfjord Formation. The secondary objectives were to prove hydrocarbons in sandstones of the Late Jurassic Sognefjord and Draupne formations and in the Middle Jurassic Brent Group. During drilling of the well, it was decided to extend the well and explore the hydrocarbon potential in the Statfjord Formation.
Operations and results
Wildcat well 31/4-11 was spudded with the semi-submersible installation Scarabeo 6 on 27 July 2000 and drilled to TD at 3271 m (2765 m TVD) in the Early Jurassic Statfjord Group. This is a deviated well. It was drilled vertical down to 1410 m and deviated from there with up to 58.7 deg inclination. The well was drilled with sea water and hi-vis pills down to 283 m and with Glydril mud from 283 m to TD.
Top Draupne Formation was encountered at 2130 m. Intra Draupne sandstones interbedded with claystones, shale and siltstone were penetrated from 2149 m to top Sognefjord Formation at 2201 m. The Draupne Formation sandstones were gas saturated while only water was sampled in the underlying Sognefjord Formation. However, geochemical analyses of cores indicated an oil column from 2189 m to 2217 m.
The Fensfjord Formation was penetrated from 2351 m to 2426 m. Moveable oil was proven with an ODT at 2376 m.
The Brent Group was encountered with top T
Around this wellbore
This wellbore on Sodir FactPages → · Press release →
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.
Developers: this page as JSON is GET /v1/data/norway/wells/4147, documented in the API reference.