NORWAY · WELLBORES · NPDID 1673
30/9-11
Exploration · Wildcat · P&A · Dry · Norsk Hydro Produksjon AS · PL 104
30/9-11 is a wildcat exploration wellbore in the North Sea, drilled by Norsk Hydro Produksjon AS, entered Oct 27, 1990, to 2,570 m in the Drake Fm.
- 2,570
- m total depth · 2,568 m vertical
- 109
- m water depth
- Oct 27, 1990
- entered · completed Nov 19, 1990
- Drake Fm
- at total depth · Early Jurassic
- 60
- m of core in 4 cores
- 98
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED NOV 19, 1992
On file for this wellbore
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Drilling
- Drilling facility
- VILDKAT EXPLORER · Semisub steel
- Drilling days
- 24
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 5.30000019°
- Drilling permit
- 652-L
- Licensing round
- 9
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 60.32441° N, 2.92889° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 30/9-11was drilled on the eastern segment of the J-structure on the Oseberg Sør field in the North Sea. Neighbouring wells 30/9-9 on the J-West and 30/9-5 S on the J-Central proved oil and gas, respectively. The primary objective of well 30/9-11 was to prove reservoir sands and oil within the Brent Group of the J-East segment and define oil/water contacts for the Tarbert/Ness and Oseberg-Rannoch-Etive reservoirs. The well was planned to be drilled 50 m into the Dunlin Formation to a total depth of approximately 2540 m.
Operations and results
Wildcat well 30/9-11 was spudded with the semi-submersible installation Vildkat on 27 October 1990 and drilled to TD at 2570 m in the Early Jurassic Drake Formation. No significant problem was encountered in the operations. The well was drilled with spud mud down to 922 m and with KCl/polymer mud from 922 m to TD.
Top Viking Group, Heather Formation was encountered at 2291 m. Top Brent Group, Tarbert Formation was encountered at 2384 m. The Brent Group was entirely water bearing. Poor, patchy shows on thin sandstone lamina in the Heather Formation were the only indications of hydrocarbons in the well.
Four cores were cut with good recovery. Core 1 was cut from 2382 m to 2403 m in the Tarbert and Ness formations, cores 2 and 3 were cut from 2450 to 2464.5 m in the Ness Formation, and core 4 was cut from 2484 m to 2511 m in the Ness and Rannoch formations. RFT water samples were taken at 2493 m in the Ness Formation.
The well was plugged back for sidetracking on 19 November 1990. It is classified as a dry well.
Testing
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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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