34/11-2 S

Exploration · Wildcat · P&A · Gas/condensate · Den norske stats oljeselskap a.s · PL 193

34/11-2 S is a wildcat exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Jan 16, 1996, to 4,743 m in the Statfjord Gp.

Discovery 34/11-2 S (Nøkken) · On the map →

4,743: m total depth · 4,579 m vertical
261: m water depth
Jan 16, 1996: entered · completed May 17, 1996
Statfjord Gp: at total depth · Early Jurassic
173.5: m of core in 9 cores
172: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED MAY 17, 1998

On file for this wellbore

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Drilling

Drilling facility: VILDKAT EXPLORER · Semisub steel
Drilling days: 123
Kelly bushing elevation: 25 m
Maximum inclination: 48°
Drilling permit: 838-L
Licensing round: 14
Plugged and abandoned: Apr 23, 2015
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 61.22590° N, 2.38245° E
Hydrocarbons in: Brent Gp · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 34/11-2 S was drilled on the Tjalve Terrace east of the Gullfaks Field in the northern North Sea. The main objective was to explore the hydrocarbon potential of the Middle Jurassic Brent Group reservoirs within the Beta structure. The secondary objective was to test for hydrocarbons in the Lower Jurassic/Triassic Statfjord Formation.

Operations and results

Wildcat well 34/11-2 S was spudded with the semi-submersible installation Vildcat Explorer on 16 January 1996 and drilled to TD at 4743 m in the Early Jurassic Statfjord Formation. The well was drilled practically vertical down to ca 3139 m, ca 140 m below the 13 3/8" casing shoe, and deviated from this point. The drilling of the well was not performed within the plan due to lost time as a consequence of bad weather, steering and building angle in 12 1/4" hole section, extended logging, extended well and equipment failure. The well was drilled with pre-hydrated bentonite, seawater and bentonite sweeps down to 1170 m, with ANCO 2000 mud with 3.4 to 5.2% glycol from 1170 m to 3766 m, and with a KCl/polymer mud system from 3766 m to TD.

Oil was proven by MDT fluid sampling in a thin sand bed at 3797.5 m (3756.2 m TVD) above the main Brent Group reservoir. The Bathonian age of these sand beds imply that they belong to the upper part of the Brent Group. Sliding or faulting of huge blocks along the foot wall of the main fault could explain the presence of this Allochtonous "Brent Group" above the Heather Formation. Top of the main objective the Brent Group was penetrated at 4068.0 m

(3422.1 m TVD), 252 m deeper than the prognosis. Pressure measurements indicated hydrocarbon fluids present in the entire

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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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