NORWAY · WELLBORES · NPDID 495
34/10-9 R
Exploration · Appraisal · P&A · Oil · Den norske stats oljeselskap a.s · Gullfaks · PL 050
34/10-9 R is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered May 29, 1980, to 2,421 m in the Statfjord Gp.
Discovery 34/10-1 Gullfaks · On the map →
- 2,421
- m total depth · 2,421 m vertical
- 202
- m water depth
- May 29, 1980
- entered · completed Jul 3, 1980
- Statfjord Gp
- at total depth · Early Jurassic
- 4.1
- m of core in 2 cores
- 95
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUL 3, 1982
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- DEEPSEA SAGA · Semisub steel
- Drilling days
- 36
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 4.5°
- Drilling permit
- 248-L2
- Licensing round
- Awarded additionally to round 3
- Plugged and abandoned
- Jul 3, 1980
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.21537° N, 2.25015° E
- Hydrocarbons in
- Brent Gp · Middle Jurassic
- Hydrocarbons in
- Cook Fm · Early Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/10-9 R is a re-entry of well 34/10-9 on the central part of the Gullfaks Field. Well 34/10-9 drilled to 2200 m in the Early Jurassic Burton Formation and proved oil in the Brent Group and Cook Formation. The objective of the re-entry was to drill further to the Statfjord Formation and to conduct drill stem tests in the Brent Group and Cook Formation.
Operations and results
Appraisal well 34/10-9 was re-entered with the semi-submersible installation Deepsea Saga on 29 May1980 and drilled from 2200 m to final TD at 2421 m in the Nansen Member of the Early Jurassic Statfjord Formation. Drilling and testing were carried out without any specific problems. The well was drilled with a gel/lignosulphonate mud system from 2200 m to TD.
The Statfjord Formation proved to be water bearing.
Two cores were cut from 2400 m to 2405.5 m in the Nansen Member of the Statfjord Formation with 74% total recovery. No wire line fluid samples were taken.
The well was permanently abandoned 3 July 1980 as an oil appraisal well.
Testing
Three drill stem tests were performed in the re-entry.
DST 1 tested the interval 2103 to 2109 m in the Cook Formation. The well produced 34.2 API oil at unstable conditions. The average flow rate on a 20/64" choke was 42 Sm3/day with a GOR of 69 Sm3/Sm3 and traces of water. The maximum temperature recorded down hole at the gauge was 84.4 deg C.
DST 2 tested the interval 20
Around this wellbore
This wellbore on Sodir FactPages →
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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