9/2-9 S

Exploration · Wildcat · Re-class to dev · Oil · Den norske stats oljeselskap a.s · Yme · PL 114

9/2-9 S is a wildcat exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Jun 29, 1999, to 4,367 m in the Bryne Fm.

Discovery 9/2-9 S · On the map →

4,367: m total depth · 3,386 m vertical
77: m water depth
Jun 29, 1999: entered · completed Sep 17, 1999
Bryne Fm: at total depth · Middle Jurassic
15.7: m of core in 1 core
—: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED SEP 17, 2001

On file for this wellbore

What the Directorate holds from this wellbore. Each opens the section that lists it.

Drilling

Drilling facility: BYFORD DOLPHIN · Semisub steel
Drilling days: 47
Kelly bushing elevation: 25 m
Maximum inclination: 0°
Drilling permit: 948-L
Licensing round: 10-A
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 57.75422° N, 4.35572° E
Hydrocarbons in: Sandnes Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 9/2-9 S was drilled on the Beta West South structure on the Yme field. The objective of the well was to discover hydrocarbons in sandstones of Middle to Upper Jurassic age (Sandnes and Bryne Formations) in two different fault compartments, to establish the oil-water contact, and to get an exact depth of top Bryne Formation.

Operations and results

The deviated wildcat well 9/2-9 S was spudded with the semi-submersible installation "Byford Dolphin" on 29 June 1999, and drilled to TD at 4367 m (3386 m TVD RKB) in the Middle Jurassic Bryne Formation. The well was drilled with seawater and hi-vis pills down to 1944.5 m and with "Ultidrill" oil based mud from 1944.5 m to TD. The base oil in the "Ultidrill" mud system consists of olefins. The wellbore was suspended after setting the 9 5/8x 10 3/4" casing. After performing completion on wellbore 9/2-B-3H, drilling continued from 3878 m. Top Bryne Formation was penetrated at 4365 m. Definite oil/water contact was proved in The Midde Jurassic. The discovered hydrocarbon pool was modest however, and it was decided not to drill more wells on the Yme structures. One core was cut in the Sandnes Formation from 3995 m to 4012 m. A FMT oil sample was taken at 3990 m in the Sandnes Formation. A 7" Liner was run the 17 September 1999, and the well was re-classed to 9/2-B-4H and completed as an oil discovery.

Testing

No drill stem test was performed.

Around this wellbore

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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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