30/7-6 R

Exploration · Wildcat · P&A · Gas/condensate · Norsk Hydro Produksjon AS · Martin Linge · PL 040

30/7-6 R is a wildcat exploration wellbore in the North Sea, drilled by Norsk Hydro Produksjon AS, entered Apr 18, 1978, to 4,115 m in the Drake Fm.

Discovery 30/7-6 Martin Linge · On the map →

4,115: m total depth · 4,115 m vertical
116: m water depth
Apr 18, 1978: entered · completed Jun 3, 1978
Drake Fm: at total depth · Early Jurassic
—: m of core
127: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUN 3, 1980

On file for this wellbore

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

Drilling

Drilling facility: TREASURE SEEKER · Semisub steel
Drilling days: 47
Kelly bushing elevation: 24 m
Maximum inclination: 0°
Drilling permit: 173-L3
Licensing round: 3
Plugged and abandoned: Jun 3, 1978
Core samples available: No
Cuttings samples available: No
Position · ED50: 60.49162° N, 2.05726° E
Hydrocarbons in: Tarbert Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 30/7-6 R was originally named 30/7-6 Phase II by the operator group. It is a re-entry of well 30/7-6, which was suspended at a final depth of 3711 m after taking a massive gas kick at the base of the Heather Formation. The well is located on the East Shetland Basin in the North Sea close to the UK border. The main objective of the re-entry was Early and Middle Jurassic sandstones.

Operations and results

Wildcat well 30/7-6 was re-entered with the semi-submersible installation Treasure Seeker on 18 April 1978. The 7" liner shoe at 3707 m was drilled out with a 6" bit using 1.92 sp.gr. mud. A small influx of gas was encountered while drilling into the high-pressured reservoir sand at 3810 m. The gas influx was circulated out and the mud weight increased to 1.98 sp.gr. After several circulations, the mud density was raised to 2.04 sp.gr. Two days elapsed in conditioning and stabilizing the well. Further drilling proceeded without significant problems to TD at 4115 m in the Early Jurassic Drake Formation. The well was drilled with a fresh water gel/chromium-lignosulphonate mud system from 3707 m to TD.

The 30/7-6 well encountered the gas condensate bearing sandstones of Middle Jurassic age (Tarbert Formation) at 3792 m. The reservoir continued with interbeds of shales and coals down to the deepest sandstone at 3892 m in the top of the Ness Formation. Net sandstone in the interval is 75 m based on wire line log evaluation. No hydrocarbon-water contact was penetrated in the well. Average porosity is calculated to 19.4% and average water saturation to 20%. No shows were described below the hydrocarbon bearing reservoir.

No conventional cores were cut in the well. RFT

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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