NORWAY · WELLBORES · NPDID 7469
35/9-11 A
Exploration · Appraisal · P&A · Oil/gas · RWE Dea Norge AS · PL 420
35/9-11 A is an appraisal exploration wellbore in the North Sea, drilled by RWE Dea Norge AS, entered Apr 15, 2014, to 3,860 m in the Statfjord Gp.
Discovery 35/9-6 S · On the map →
- 3,860
- m total depth · 3,820 m vertical
- 367.5
- m water depth
- Apr 15, 2014
- entered · completed May 21, 2014
- Statfjord Gp
- at total depth · Early Jurassic
- 82.4
- m of core in 5 cores
- 129
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED MAY 21, 2016
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- LEIV EIRIKSSON · Semisub steel
- Drilling days
- 36
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 21.79999924°
- Drilling permit
- 1522-L
- Licensing round
- TFO2006
- Plugged and abandoned
- Jul 12, 2015
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.35707° N, 3.67905° E
- Hydrocarbons in
- Intra Heather Fm Ss · Late Jurassic
- Hydrocarbons in
- Brent Gp · Middle Jurassic
- Hydrocarbons in
- Cook Fm · Early Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 35/9-11 A is a sidetrack to well 35/9-11 S. The well bores were drilled on the northern tip of the Ryggsteinen Ridge, west of the Gjøa Field. The two well bores had the same general objective: to appraise the 35/9-6 Titan Discovery. The 35/9-11 S well verified the Titan discovery. This initiated 35/9-11 A to perform data acquisition including coring, pressure measurement and fluid sampling.
Operations and results
Appraisal well 35/9-11 A was kicked off at 3065 m in 35/9-11 S on 15 April 2014. It was drilled with the semi-submersible installation Leiv Eiriksson to TD at 3860 m in the Early Jurassic Statfjord Group. The sidetrack well was drilled parallel to the primary well bore at a distance ca 25 m from the primary well bore. No significant problem was encountered in the operations. The well was drilled with Glydril mud from kick-off to TD.
A 21 m thick sequence of Callovian sandstones was penetrated from 3270 m to 3291. These sandstones were absent in 33/9-11 S, just 25 m away. The rest of the Jurassic reservoir targets were also present in well 35/9-11 A. According to the petrophysical evaluation, hydrocarbons were proven in six different stratigraphic levels (Callovian-, Tarbert-, Etive-, Cook-, Johansen- and Statfjord-Formation).
The data acquisition in 35/9-11 A included MWD/LWD, 11 wireline runs including formation pressure/fluid sampling and 5 coring runs with a total recovery 83.6 m. Three cores were cut in the Tarbert Formation from 3440 to 3454 m; these should be shifted + 3.0 m to match the wire line logs. One core was cut in the Etive/Rannoch formations from 3497 to 3527 m; this core should be shifted +2.9 m to match the logs. One core was cut in in the Cook
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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