30/11-8 A

Exploration · Wildcat · P&A · Oil/gas/condensate · Statoil Petroleum AS · Munin · PL 035

30/11-8 A is a wildcat exploration wellbore in the North Sea, drilled by Statoil Petroleum AS, entered May 20, 2011, to 4,475 m in the Drake Fm.

Discovery 30/11-8 A · On the map →

4,475: m total depth · 4,268 m vertical
107.5: m water depth
May 20, 2011: entered · completed Jul 3, 2011
Drake Fm: at total depth · Middle Jurassic
33.6: m of core in 1 core
143: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUL 3, 2013

On file for this wellbore

What the Directorate holds from this wellbore. Each opens the section that lists it.

Drilling

Drilling facility: OCEAN VANGUARD · Semisub steel
Drilling days: 45
Kelly bushing elevation: 22 m
Maximum inclination: 37.59999847°
Drilling permit: 1360-L
Licensing round: 2-A
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 60.21751° N, 2.48950° E
Hydrocarbons in: Tarbert Fm · Middle Jurassic
Hydrocarbons in: Heather Fm · Late Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 30/11-8 A is a sidetrack to the 30/11-8 S Krafla well in the Fensal Sub-basin between the Frigg and Oseberg fields in the North Sea. Well 30/11-8 S found oil in the Middle Jurassic Tarbert Formation and condensate in the Middle Jurassic Ness Formation. Similar formations and fluids as found in the 30/11-8 S Krafla main structure were also expected in the nearby Krafla West structure and the main objective for the 30/11-8 A sidetrack, was thus to prove commercial hydrocarbon accumulation in the Upper and Middle Tarbert Formation and potentially in Lower Brent Group. The Krafla West reservoir is situated approximately 400 m deeper than the Krafla main.

Operations and results

Well 30/11-8 A was kicked off at 2135 m (2135 m TVD) in main well bore 30/11-8 S on 20 May 2011. It was drilled with the semi-submersible installation Ocean Vanguard to TD at 4475 m (4268 m TVD) in the Early Jurassic Drake Formation. No significant problem was encountered in the operations. The well was drilled with XP-07 OBM from kick-off to TD.

The Viking Group, Heather Formation was encountered at 3671 m (3471.8 m TVD). At 3802 m (3580 m TVD) an Intra-Heather Formation sandstone sequence was encountered with oil down to ca 3825 m (3602 m TVD). The Brent Group, Tarbert Formation was encountered at 3914.6 m (3713.1 m TVD), which was 61.9 m TVD shallower than prognosed. The Upper and Middle Tarbert Formation reservoirs proved to be condensate filled. The condensate-water contact is estimated at 4017 m (3791.6 m TVD). The Ness and Etive Formations were water filled. Apart from shows in the petroleum-bearing reservoirs the cutting shows descriptions from 4065 - 4083 m MD in the Tarbert Formation had strong yellowish direct fluorescence and very slow stre

Around this wellbore

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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.

Developers: this page as JSON is GET /v1/data/norway/wells/6611, documented in the API reference.