NORWAY · WELLBORES · NPDID 8979
30/6-31 S
Exploration · Wildcat · P&A · Dry · Equinor Energy AS · PL 053
30/6-31 S is a wildcat exploration wellbore in the North Sea, drilled by Equinor Energy AS, entered Apr 4, 2020, to 2,852 m in the Ness Fm.
- 2,852
- m total depth · 2,830 m vertical
- 107
- m water depth
- Apr 4, 2020
- entered · completed Apr 25, 2020
- Ness Fm
- at total depth · Middle Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED APR 25, 2022
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- WEST HERCULES · Semisub steel
- Drilling days
- 22
- Kelly bushing elevation
- 31 m
- Maximum inclination
- 0°
- Drilling permit
- 1804-L
- Licensing round
- 4
- Plugged and abandoned
- Apr 25, 2020
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 60.55358° N, 2.87007° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 30/6-31 S was drilled to test the Helleneset prospect between the Oseberg and Brage fields on the Oseberg Fault block in the North Sea. The primary objective was to test the hydrocarbon potential in Callovian Intra-Heather Formation sandstones.
Operations and results
A shallow gas pilot hole 30/6-U-28 was spudded 18 m south of the main well location on 9 March 2020. Due to weather and other problems, this well was aborted after drilling down to 511 m. A second pilot hole (drilled with 8 ½” BHA) was then drilled from 30/6-31 S well location down to 1120 m. Based on the log interpretation, flow checks, sonar and ROV observations, there were no shallow gas observed from these pilot holes.
Wildcat well 30/6-31 S was spudded with the semi-submersible installation West Hercules on 4 April 2020 and drilled to TD at 2852 m (2830.4 m TVD) in the Middle Jurassic Ness Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 1120 m, with Versatec oil-based mud from 1120 m to 2649 m, and with Exploradrill oil-based mud from 2649 m to TD.
High formation gas levels were observed in limestones within Shetland Group in the 12 ¼” section. The limestones are correlated with Shetland limestone in Oseberg Main Field. A gas chimney is observed in the seismic, showing potential leak to overburden and which may charge the Shetland limestone at the well location.
The targeted Jurassic Callovian syn-rift reservoir was poorly developed and appear as thin cemented sands without any indication of hydrocarbons from the logs, gas, or cuttings. A thin Tarbert Formation was drilled, and no
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.
Developers: this page as JSON is GET /v1/data/norway/wells/8979, documented in the API reference.