NORWAY · WELLBORES · NPDID 1973
6506/11-3
Exploration · Wildcat · P&A · Shows · Den norske stats oljeselskap a.s · PL 134
6506/11-3 is a wildcat exploration wellbore in the Norwegian Sea, drilled by Den norske stats oljeselskap a.s, entered Jul 8, 1992, to 4,350 m in the Not Fm.
- 4,350
- m total depth · 4,346 m vertical
- 328
- m water depth
- Jul 8, 1992
- entered · completed Oct 2, 1992
- Not Fm
- at total depth · Middle Jurassic
- 127
- m of core in 10 cores
- 127
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED OCT 2, 1994
On file for this wellbore
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Drilling
- Drilling facility
- ROSS RIG (2) · Semisub steel
- Drilling days
- 86
- Kelly bushing elevation
- 24 m
- Maximum inclination
- 0°
- Drilling permit
- 734-L
- Licensing round
- 11-A
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 65.23290° N, 6.37414° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
The well 6506/11-3 is located in the Haltenbanken region, north west of the Smørbukk area. The objectives of well 6506/11-3 were: to prove oil in the Lysing, Lange (Cretaceous) and the Rogn (Jurassic) Formation; to test the hydrocarbon potential of the Nise Formation and the Åre Formation; and to penetrate the Upper Triassic and test the reservoir potential in order to prepare for relinquishment.
Operations and results
Well 6506/11-3 was spudded with the semi-submersible installation Ross Rig on 8 July 1992 and drilled to TD at 4350 m in the Middle Jurassic Not Formation. The well was drilled with seawater and hi-vis pills down to 1020 m, with Gypsum/PAC-Polymer mud from 1020 m to 2020 m, with Gypsum/PAC/Thermopol/Ancotemp mud from 2020 m to 3717 m, and with Ancotherm mud from 3717 m to TD. Due to high pressure the well was terminated at a shallower depth than prognosis
Top Nise Formation was encountered at 2357 m and proved to be 196 m thick. It was predominantly Clay/Claystone with some thin sandstone layers, mostly in the upper part. The Lysing Formation was tested and produced water with minor amounts of gas. Only 2 m Spekk Formation was encountered and the Rogn Formation was not developed. Sandstones of the Jurassic Garn Formation were water bearing. Shows were recorded in the Lysing and Garn Formation.
Post-well geochemical screening of cores showed shales of good potential in the interval 3920 m to 3990 m across the Cenomanian ? Turonian in the Lange Formation. This may possibly be seen as an equivalent to the Blodøks Formation in the North Sea.
Ten cores were cut in the well. Core 1 was cut from 3143.5 m to 3170.5 m in the Lysing Formation. Cores 2, 3, and 4 were cut in the interval 3919 m to 3945.6 m in Upper Cenomanian ? Turonian sediments of the Lange Formation. Cores 5, 6, and 7 were cut in the interval 3976 m to 4003 m in Albian to Cenomanian sediments of the Lange Formation. Cores 8, 9,
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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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