30/11-9 S

Exploration · Wildcat · P&A · Gas · Statoil Petroleum AS · Munin · PL 272

30/11-9 S is a wildcat exploration wellbore in the North Sea, drilled by Statoil Petroleum AS, entered Sep 22, 2013, to 3,735 m in the Ness Fm.

Discovery 30/11-9 S (Askja) · On the map →

3,735: m total depth · 3,658.6 m vertical
110: m water depth
Sep 22, 2013: entered · completed Nov 13, 2013
Ness Fm: at total depth · Middle Jurassic
—: m of core
133: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED NOV 13, 2015

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: 53
Kelly bushing elevation: 22 m
Maximum inclination: 21°
Drilling permit: 1482-L
Licensing round: NST2001
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 60.10302° N, 2.58707° E
Hydrocarbons in: Tarbert Fm · Middle Jurassic
Hydrocarbons in: Heather Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 30/11-9 S was drilled on the Askja West prospect in the Fensal Sub-basin, about 35 km south of the Oseberg Sør installation in the North Sea. The primary objective was to prove petroleum in Late to Middle Jurassic reservoir rocks (lower part of the Heather Formation and the Tarbert Formation). The secondary exploration target was to prove petroleum in reservoir rocks in the Middle Jurassic (Ness and Etive formations).

Operations and results

Wildcat well 30/11-9 S was spudded with the semi-submersible installation Ocean Vanguard on 22 September 2013. While drilling the 26" hole section, the accelerator twisted off and a part of the BHA was lost at 840 m. Several unsuccessful fishing attempts were made before it was decided to plug back and make a technical sidetrack. Sidetrack wellbore 30/11-9 ST2 was kicked off at 427 m and drilled to final TD at 3735 m in the Middle Jurassic Ness Formation. The sidetrack was drilled as an S shaped well. The deviated section, from 1470 to 3215 m, was drilled with a maximum angle of 21 degrees. The final 8 1/2" section was vertical. The first well bore was drilled with spud mud, while the 30/11-9 ST2 technical sidetrack was drilled with KCl/polymer from kick-off point to 1798 m and with XP-07 from 1798 m to TD. The content of the XP-07 base oil is C10 to C14 n-alkanes with traces of light adamantanes and light aromatics.

The top of the primary target reservoir was picked at 3269 m (3193 m TVD), 50 m shallower than prognosed. The whole reservoir was found to be Tarbert Formation including the top section, which pre-drill was prognosed to be Lower Heather Formation. Based on the fluid sampling, gas was found in two differently pressured compartments in t

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/7280, documented in the API reference.