NORWAY · WELLBORES · NPDID 4301
34/7-31 A
Exploration · Appraisal · P&A · Oil · Norsk Hydro Produksjon AS · Vigdis · PL 089
34/7-31 A is an appraisal exploration wellbore in the North Sea, drilled by Norsk Hydro Produksjon AS, entered Apr 13, 2001, to 3,454 m in the Heather Fm.
Discovery 34/7-23 S · On the map →
- 3,454
- m total depth · 2,355.4 m vertical
- 207
- m water depth
- Apr 13, 2001
- entered · completed Apr 25, 2001
- Heather Fm
- at total depth · Middle Jurassic
- —
- m of core
- 89
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED APR 25, 2003
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- SCARABEO 6 · Semisub steel
- Drilling days
- 13
- Kelly bushing elevation
- 26 m
- Maximum inclination
- 131°
- Drilling permit
- 1002-L
- Licensing round
- 8
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.31047° N, 2.06661° E
- Hydrocarbons in
- Intra Draupne Fm Ss · Late Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/7-31 A is a sidetrack to 34/7-31, which found a ca 35 m net column of oil in Intra-Draupne Formation Sandstone. The sidetrack was drilled to map the extent of HC-filled Intra Draupne Formation.
Operations and results
Appraisal well 34/7-31 A was kicked off at 1788 m, just below the 13 3/8" casing in well 34/7-31 on 15 April 2001. The semi-submersible installation Scarabeo 6 was used for the operations. The deviation angle increased throughout the well bore to ca 130 deg at TD, and was between 80 to 90 deg through the Intra-Draupne Formation Sandstone. Only MWD logs are available from the well, no wire line logging was performed. The well was drilled with oil-based mud (Versavert) from kick-off to TD.
The well penetrated 260 m MD of oil-filled Intra-Draupne Formation Sandstone. After that ca 15 m of Draupne Formation shale and 281 m of Heather Formation was penetrated before the younger Cromer Knoll Group was encountered. The eastern development of the Intra Draupne Formation Sandstone was thus mapped practically in-well.
There are no cores from this well bore. No fluid samples were taken.
The well was permanently plugged and abandoned on 25 April 2001as an oil appraisal.
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.
Developers: this page as JSON is GET /v1/data/norway/wells/4301, documented in the API reference.