6407/6-5

Exploration · Appraisal · P&A · Gas · Den norske stats oljeselskap a.s · Mikkel · PL 092

6407/6-5 is an appraisal exploration wellbore in the Norwegian Sea, drilled by Den norske stats oljeselskap a.s, entered Nov 15, 1999, to 2,759 m in the Tilje Fm.

Discovery 6407/6-3 Mikkel · On the map →

2,759: m total depth · 2,757.5 m vertical
225: m water depth
Nov 15, 1999: entered · completed Dec 27, 1999
Tilje Fm: at total depth · Early Jurassic
107.3: m of core in 2 cores
111: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED DEC 27, 2001

On file for this wellbore

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

Drilling

Drilling facility: BYFORD DOLPHIN · Semisub steel
Drilling days: 43
Kelly bushing elevation: 25 m
Maximum inclination: 5.0999999°
Drilling permit: 967-L
Licensing round: 8
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 64.64300° N, 7.66774° E
Hydrocarbons in: Fangst Gp · Middle Jurassic
Hydrocarbons in: Tofte Fm · Early Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

The main objective of well 6407/6-5 was to appraise hydrocarbons in the Fangst Group and to enhance the understanding of the hydrocarbon characteristics, contact and distribution within the Mikkel structure. Block 6407/6 is situated in the fault zone separating the Trøndelag Platform and the Halten Terrace. The fault zone where the structural element Mikkel is situated is called the Bremstein Fault Complex. Secondary targets were to investigate the degree of communication with the gas proven in well 6407/6-3, and to investigate the presence of hydrocarbons in the Tofte and Tilje Formations of the Båt Group.

Operations and results

Appraisal well 6407/6-5 was spudded with the semi-submersible installation "Byford Dolphin" on 15 November 1999 and drilled without major problems to a total depth of 2759 m in the Early Jurassic Tilje Formation. The well was drilled with seawater and bentonite down to 423 m, with KCl/PAC mud from 423 m to 1202 m, and with oil based mud ("Versavert") from 1202 m to TD. Oil and gas were encountered in the Fangst Group. The GOC was defined at 2543 m TVD MSL and an OWC was found at 2563 m TVD MSL, based on pressure gradients. This coincided with the hydrocarbon contacts proven in well 6407/6-3. MDT sampling gave gas samples from the Garn Formation (2382 m), oil from the Tofte Formation (2581 m), and water from the Tofte Formation (2626 m). Two cores were cut in the Ile, Ror, and Tofte Formations in the interval 2490 m to 2598 m. Recovery was 100 %. The well was permanently abandoned as a gas appraisal well on 27 December 1999.

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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