NORWAY · WELLBORES · NPDID 468
6506/12-3
Exploration · Wildcat · P&A · Oil/gas · Den norske stats oljeselskap a.s · Åsgard · PL 094
6506/12-3 is a wildcat exploration wellbore in the Norwegian Sea, drilled by Den norske stats oljeselskap a.s, entered Mar 2, 1985, to 4,360 m in the Tilje Fm.
Discovery 6506/12-3 Smørbukk Sør · On the map →
- 4,360
- m total depth · 4,359 m vertical
- 301
- m water depth
- Mar 2, 1985
- entered · completed Jul 17, 1985
- Tilje Fm
- at total depth · Early Jurassic
- 308.5
- m of core in 15 cores
- 152
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUL 17, 1987
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ROSS ISLE · Semisub steel
- Drilling days
- 138
- Kelly bushing elevation
- 22 m
- Maximum inclination
- 4.4000001°
- Drilling permit
- 456-L
- Licensing round
- 8
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 65.02530° N, 6.89093° E
- Hydrocarbons in
- Lysing Fm · Late Cretaceous
- Hydrocarbons in
- Fangst Gp · Middle Jurassic
- Hydrocarbons in
- Tilje Fm · Early Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Wildcat well 6506/12-3 is a replacement well for 6506/12-2, which was abandoned at 955 m due to technical problems. The new well was designed to test the hydrocarbon potential of the Beta structure in the southeast part of the
block. The main object was Middle Jurassic sandstones, secondary targets were possible Cretaceous sands, Early Jurassic sandstones and sandstones within the Coal Beds.
Operations and results
Well 6506/12-3 was spudded with the semi-submersible installation Ross Isle, 47 m from the junked well 6506/12-2. It was spudded on 2 March 1985 and drilled to TD at 4360 m in the Early Jurassic Tilje Formation (formerly called the Aldra Formation). No significant technical problems occurred during the operations. From 0600 hours on 15 June, during the testing phase, the rig was on strike for 13 days. The well was drilled with seawater/gel down to 955 m, with gypsum/lignosulphonate mud from 955 m to 3831 m, and with gel/lignosulphonate mud from 3831 m to TD. The shallow gas present at 572 m in 6506/12-2 was not encountered in 6506/12-3.
Top Middle Jurassic Garn Formation (formerly Tomma Formation) came in at 3822 m, 80 m above the prognosis. The Early Jurassic Tilje Formation sandstone (Aldra Formation) came in at 4147 m. Hydrocarbons were encountered both in the Middle and the Early Jurassic sandstones, with a hydrocarbon/water contact at 4216 m in the Tilje Formation. Late Cretaceous Lysing sandstones at the top of the Cromer Knoll Group (Finnvær Group) was also hydrocarbon bearing. A total of 242 m of hydrocarbon bearing sands was proven. Shows were only recorded in association with the hydrocarbon bearing sections.
A total of 289 m core was recovered in 15 cores from the Garn, Not, Ile, Ror, and Tilje Formations between 3836 and 4269 m. Six RFT runs were completed in the Early - Middle Jurassic section in well 6506/12-3. A total of 47 pressure tests gave reliable results. In addition, segreg
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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