30/11-8 S

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

30/11-8 S is a wildcat exploration wellbore in the North Sea, drilled by Statoil Petroleum AS, entered Mar 20, 2011, to 4,043 m in the Drake Fm.

Discovery 30/11-8 S Munin · On the map →

4,043: m total depth · 3,844 m vertical
107.5: m water depth
Mar 20, 2011: entered · completed May 20, 2011
Drake Fm: at total depth · Early Jurassic
83.1: m of core in 2 cores
133: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED MAY 20, 2013

On file for this wellbore

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Drilling

Drilling facility: OCEAN VANGUARD · Semisub steel
Drilling days: 62
Kelly bushing elevation: 22 m
Maximum inclination: 46.90000153°
Drilling permit: 1339-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: Ness Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 30/11-8 S was drilled on the Krafla prospect in the Fensal Sub-basin between the Frigg and Oseberg fields in the North Sea. The Krafla prospect is a horst structure with multiple reservoir levels. The main objective of the well was to prove a commercial hydrocarbon accumulation in the Upper and Middle Tarbert Formation with potential also for finding hydrocarbon accumulations in the deeper Etive and Ness Formations. A secondary well objective was to test a lead within the Paleocene Sele Formation (Hermod Sandstone). A geological sidetrack to the Krafla West structure would be considered if hydrocarbons and producible reservoir in the Brent Group were proven in the main well.

Operations and results

Well 30/11-8 S was spudded with the semi-submersible installation Ocean Vanguard on 20 March 2011 and drilled to TD at 4043 m (3844 m TVD) in the Early Jurassic Drake Formation. No significant problem was encountered in the operations. No shallow gas was detected. The well was drilled with seawater and hi-vis pills down to 813 m, with Performadrill WBM from 813 m to 2214 m, and with XP-07 OBM from 2214 m to TD.

The Viking Group, Heather Formation came in at 3473 m (3285 m TVD). The upper part of Heather had water filled sandstones with oil shows. The Brent Group was encountered at 3528.9 m (3339.0 m TVD) which was 17 m TVD deeper than prognosed. The Upper and Middle Tarbert Formation reservoirs proved to be oil filled, but no OWC was encountered. The Ness Formation came in at 3732 m (3538 m TVD) and proved to be both condensate and water filled, but no contact was found. The Etive Formation was water filled without shows. Also the lead in the Sele Formation (Hermod Sandstone) proved to be water filled.

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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.

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