NORWAY · WELLBORES · NPDID 4438
25/8-13
Exploration · Wildcat · P&A · Dry · Esso Exploration and Production Norway A/S · PL 027 B
25/8-13 is a wildcat exploration wellbore in the North Sea, drilled by Esso Exploration and Production Norway A/S, entered Oct 31, 2001, to 2,276 m in the Statfjord Gp.
- 2,276
- m total depth · 2,276 m vertical
- 127.6
- m water depth
- Oct 31, 2001
- entered · completed Nov 20, 2001
- Statfjord Gp
- at total depth · Early Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED NOV 20, 2003
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- WEST ALPHA · Semisub steel
- Drilling days
- 21
- Kelly bushing elevation
- 18 m
- Maximum inclination
- 0°
- Drilling permit
- 1023-L
- Licensing round
- 2-A
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 59.36175° N, 2.36336° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 25/8-13 was drilled on Production License 027B, near the Ringhorne and Jotun fields. The primary targets were the Early Paleocene Ty and Heimdal Formation sands.
Operations and results
Wildcat well 25/8-13 was spudded with the semi-submersible installation "West Alpha" on 31 October 2001 and drilled to TD at 2258 m in the Early Jurassic Statfjord Formation. The well was drilled with seawater and bentonite sweeps down to 1038 m and with "Versavert" oil based mud from 1038 m to TD.
The Heimdal Formation sand was not developed in this well. The best reservoir sands were encountered in the Ty Formation from 2099 m to 2182.5 m and in the Statfjord Formation from 2235 m to TD. All reservoir sands in the well were found water bearing. An anomaly on the resistivity logs in the uppermost 3 m of the Ty reservoir section could indicate residual hydrocarbons in this interval, but this is not supported by other data and it is therefore believed that the anomaly is due to mud invasion from the OBM.
Eleven pressure points were successfully collected with a TD MDT logging run in the Paleocene, Jurassic and Triassic. From this data it appears that the massive Ty Fm sands and the Jurassic Vestland Group lie on the same pressure gradient while the Statfjord sands are not in pressure communication, lying on a gradient at about 5 bars higher. No coring (sidewall or conventional) was undertaken in this well. No fluid samples were taken. The well was permanently abandoned on 20 November 2001 as a dry well.
Testing
No drill stem test was performed.
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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