6406/9-2

Exploration · Appraisal · P&A · Gas · A/S Norske Shell · PL 255

6406/9-2 is an appraisal exploration wellbore in the Norwegian Sea, drilled by A/S Norske Shell, entered Feb 5, 2007, to 5,348 m in the Åre Fm.

Discovery 6406/9-1 Linnorm · On the map →

5,348: m total depth · 5,347 m vertical
299: m water depth
Feb 5, 2007: entered · completed Jul 1, 2007
Åre Fm: at total depth · Early Jurassic
91.9: m of core in 4 cores
184: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED JUL 1, 2009

On file for this wellbore

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

Drilling

Drilling facility: WEST ALPHA · Semisub steel
Drilling days: 147
Kelly bushing elevation: 18 m
Maximum inclination: 4.69999981°
Drilling permit: 1129-L
Licensing round: 16
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 64.47634° N, 6.80263° E
Hydrocarbons in: Garn Fm · Middle Jurassic
Hydrocarbons in: Ile Fm · Middle Jurassic
Hydrocarbons in: Tofte Fm · Early Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

The Onyx South West Appraisal Well 6406/9-2 was drilled to appraise the Onyx South West gas discovery made in 2005. Onyx is situated west of the Draugen and north-west of the Njord Fields in the southern Haltenbanken area. The well was drilled about 3.5 km NNW of the Onyx SW Exploration Well 6406/9-1, which discovered gas in a Lower to Middle Jurassic fault block. The main objective of this well was to decrease the volumetric uncertainty of the Onyx SW gas discovery by penetrating the expected FWL of the Ile Formation and deeper reservoirs at structural spill point.

Operations and results

Well 6406/9-2 was spudded with the semi-submersible installation West Alpha on 5 February 2007 and drilled to TD at 5348 m in Early Jurassic sediments of the Åre Formation. Prior to logging in the 12 1/4" hole there was an incident onboard the rig with fire in the engine room. The well was shut in on the Shear rams and wedge locked. After a full muster was achieved, the fire was put out with Inergen and the situation brought under control. Apart from this there were no serious technical problems in the operations. The well was drilled with spud mud down to 1450 m, with Ultradril KCl/glycol mud from 1450 m to 2410 m, and with oil based Paratherm mud from 2410 m to TD.

Wire line logs were successfully acquired in the 17 1/2" section over the Kai, Brygge and Tare formations, with some noteworthy results. The neutron density indicated exceptionally high porosity in the base of the Kai -approaching 50 %. This is higher than should be normally possible, and implies the rock is not grain supported. The relationship between compressional and shear sonic changes dramatically in the Brygge relative to the Kai and Tare formations.

Top Viking Group was encountered at 4325 m with 70 m Spekk Formation and 242 m of Melke Formation. The Fangst Group was encountered at 4637 m. The Garn formation is not a reservoir in the area. Low r

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/5454, documented in the API reference.