6406/2-6 A

Exploration · Appraisal · P&A · Gas/condensate · Den norske stats oljeselskap a.s · Kristin · PL 199

6406/2-6 A is an appraisal exploration wellbore in the Norwegian Sea, drilled by Den norske stats oljeselskap a.s, entered May 24, 2000, to 5,251 m in the Tofte Fm.

Discovery 6406/2-6 Ragnfrid · On the map →

5,251: m total depth · 4,842.2 m vertical
302: m water depth
May 24, 2000: entered · completed Jul 6, 2000
Tofte Fm: at total depth · Early Jurassic
21.3: m of core in 1 core
175: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUL 6, 2002

On file for this wellbore

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

Drilling

Drilling facility: TRANSOCEAN ARCTIC · Semisub steel
Drilling days: 44
Kelly bushing elevation: 24 m
Maximum inclination: 42.59999847°
Drilling permit: 975-L
Licensing round: 14
Plugged and abandoned: Jul 6, 2000
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 64.75871° N, 6.38186° E
Hydrocarbons in: Tofte Fm · Early Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

The sidetrack well 6406/2-6 A was drilled in a presumed up-dip position of well 6406/2-6. The primary objective was to appraise the discovery in the Tofte Formation on the Ragnfrid structure. A secondary objective was to test the hydrocarbon potential in the Garn and the Ile Formations.

Operations and results

Appraisal well 6406/2-6 A was side-tracked from re-opened primary well 6406/2-6 on 24 May 2000 from just below the 13 3/8" casing shoe at 2715 m and drilled to a total depth of 5251 m/4842 m TVD, approximately 150 m into the Tofte Formation. Well 6406/2-6 A was drilled without major problems. It was drilled with oil-based mud ("VersaPro") from kick-off point to TD.

In contrast to the expected up-dip position of the side-track, the well proved a down faulted segment and penetrated a significantly thicker Melke Formation and a complete package of Garn Formation, instead of a strongly eroded package according to the prognosis. The proven segment is expected to cover a relatively small area in the central parts of the Ragnfrid structure. The reservoir units proved to be down faulted and a 64 m TVD thick Viking Group was present. The Garn and the Ile Formations proved water bearing except for a possible condensate bearing thin sand in the Ile Formation. The Tofte Formation proved an approximately 4 m condensate in the top of the formation. This was confirmed by an MDT sample taken at 5105. A core was cut in the interval 5123 m to 5151 m in the Tofte Formation. The well was permanently abandoned as a condensate appraisal well on 6 July 2000.

Testing

No drill stem test was performed

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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