15/6-12

Exploration · Wildcat · P&A · Oil · Statoil Petroleum AS · PL 303

15/6-12 is a wildcat exploration wellbore in the North Sea, drilled by Statoil Petroleum AS, entered Dec 22, 2010, to 3,930 m in the Skagerrak Fm.

Discovery 15/6-12 (McHenry) · On the map →

3,930: m total depth · 3,930 m vertical
115.5: m water depth
Dec 22, 2010: entered · completed Feb 9, 2011
Skagerrak Fm: at total depth · Late Triassic
—: m of core
127: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED FEB 9, 2013

On file for this wellbore

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

Drilling

Drilling facility: TRANSOCEAN LEADER · Semisub steel
Drilling days: 50
Kelly bushing elevation: 23.5 m
Maximum inclination: 2.4000001°
Drilling permit: 1335-L
Licensing round: TFO2003
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 58.63014° N, 1.73763° E
Hydrocarbons in: Hugin Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 15/6-12 was drilled on the McHenry prospect on the south-western tip of the Gudrun Terrace in the south Viking Graben. The main objective was to test the Hugin Formation. The secondary objectives were to test the Sleipner and

Skagerrak formations. The Hugin Formation was also the main reservoir in the Dagny/Ermintrude discovery wells. The deep oil-water-contact observed in the 15/5-7 well on Dagny (3897 m TVD SS) indicated a possible spill from the Dagny/Ermintrude structure towards McHenry.

Operations and results

Wildcat well 15/6-12 was spudded with the semi-submersible installation on Transocean Leader on 22 December 2010 and drilled to TD at 3930 m in the Triassic Skagerrak Formation. Shallow gas was interpreted close to the well location and a 9 7/8" pilot hole was drilled from the 30" conductor shoe to 1060 m. No shallow gas was observed. Eighteen meter of drill string was lost in the hole prior to the logging job so loggers TD is 3914 m. Otherwise no significant problem occurred in the operations. The well was drilled with sea water and hi-vis pills down to 1104 m, with Performadrill WBM from 1104 m to 2768 m, and with Low-ECD XP-07 oil based mud from 2768 m to TD.

The Hugin Formation was penetrated at 3798 m. It was only 12 m thick and held a 4 m thick oil filled sandstone. The Hugin sand was prognosed to be between 10 and 100 m thick. The pressure measured in the Hugin Formation indicated no communication with the Dagny/Ermintrude discoveries to the south of 15/6-12. Otherwise there were no hydrocarbon indications apart from a 2.5 m thick limestone stringer with top at 2975 m. This limestone showed a significant resistivity increase and a decrease in

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/6518, documented in the API reference.