NORWAY · WELLBORES · NPDID 9204
15/12-26
Exploration · Wildcat · P&A · Dry · Chrysaor Norge AS · PL 973
15/12-26 is a wildcat exploration wellbore in the North Sea, drilled by Chrysaor Norge AS, entered Mar 28, 2021, to 2,787 m in the Zechstein Gp.
- 2,787
- m total depth · 2,786 m vertical
- 87
- m water depth
- Mar 28, 2021
- entered · completed May 13, 2021
- Zechstein Gp
- at total depth · Early Permian
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED FEB 28, 2023
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- COSLInnovator · Semisub steel
- Drilling days
- 47
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 4.19999981°
- Drilling permit
- 1842-L
- Licensing round
- TFO2018
- Plugged and abandoned
- May 13, 2021
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 58.13862° N, 1.92675° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 15/12-26 was drilled to test the Ilder prospect between the Grevling and Varg discoveries in the Ling depression in the North Sea. The primary objective was to find hydrocarbons in the Late Jurassic Ula formation. The secondary objective was to test the Triassic Skagerrak Formation.
Operations and results
A 9 7/8" pilot hole was drilled down to 1270 m with no shallow gas observed.
Wildcat well 15/12-26 was spudded with the semi-submersible installation COSLInnovator on 12 May 2021. The 17 1/2" hole was drilled to 1270 m. Due to severe hole instability problems BOP was set at 1123 m. When starting to clean out the long rat hole from 1123 m to 1270 m, severe hole stability issues quickly became prominent. The decision was made to cement back and make a side-track. The 12 1/4" section was kicked off as a technical side-track 15/12-26 T2 at 1140 m within the Nordland Group and drilled down to a TD at 2625 m, 15 m into the Late Jurassic Draupne Formation. Prior to running in hole with 8-1/2" BHA #9, a problem was observed with the BOP. The BOP was pulled and after a week of pulling, repair and testing, the BOP was run back in hole. The 8 1/2" section was drilled to final TD at 2787 m (2786 m TVD), 3 m into Zechstein anhydrite. The primary well was drilled with seawater and hi-vis pills down to 1270 m while the side-track was drilled with Aquadril mud from 1140 m to TD. Altogether 14.6 days NPT was spent on the well.
The Ula Formation reservoir was encountered at 2709 m (2708 m TVD) with good to very good reservoir sand. The Ula Formation was confirmed water bearing by logs and pressure points. In addition, the well encountered a ca 8 m thick Hugin For
Around this wellbore
This wellbore on Sodir FactPages → · Press release →
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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