7/12-12 S

Exploration · Wildcat · P&A · Dry · BP Norway Limited U.A. · PL 019

7/12-12 S is a wildcat exploration wellbore in the North Sea, drilled by BP Norway Limited U.A., entered Nov 14, 1995, to 6,079 m in the Vestland Gp.

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6,079: m total depth · 4,067 m vertical
69.5: m water depth
Nov 14, 1995: entered · completed Mar 17, 1996
Vestland Gp: at total depth · Triassic
—: m of core
152: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED MAR 17, 1998

On file for this wellbore

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

Drilling

Drilling facility: ULA DP · Jacket 4 legs
Drilling days: 125
Kelly bushing elevation: 57 m
Maximum inclination: 58.40000153°
Drilling permit: 833-L
Licensing round: 1-A
Plugged and abandoned: Mar 17, 1996
Core samples available: No
Cuttings samples available: No
Position · ED50: 57.11145° N, 2.84750° E

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 7/12-12 S was drilled as a reach-out well from the Ula Platform to a fault block separate from the main Ula Field ca 4 km south-southwest of the Platform location. The primary objective was to test the reservoir and hydrocarbon potential in the Ula Formation. In the event of a discovery the plan was to complete the well as a producer.

Operations and results

Operations on wildcat well 7/12-12 S started on 9 October 1995. The well was drilled from the Ula Platform and was kicked off at 547 m in existing development well 7/12-A-10 the 14th of November 1995. After drilling to 16" hole section TD at 2498 m the hole packed off and the string got stuck. Several attempts were made to retrieve the fish, but failed. A balanced kick-off plug was set and the well was sidetracked (7/12-12 S T2) from 958 m and drilled to final TD at 6079 m (4067 m TVD) in interbedded sands, silts and shales of possible pre-rift age. The well was drilled with Enviromul oil based mud from kick-off to TD. Considerable hole problems occurred during drilling. There is a discrepancy of up to 7 m between drilled and logged depth below 5482 m. Depths given here are drilled depths.

Top Reservoir (Ula Fm) was penetrated at 6018 m MD (4020 m TVD), 118 m TVD deeper than predicted. Base Ula Formation was picked at 6067 m MD (4057 m TVD).Wire line logging and lack of shows proved a dry reservoir. Due to operational problems the planned open hole logging program was restricted to GR/Sonic and Resistivity.

No cores were cut and no wire line fluid samples were taken.

The well was permanently abandoned on 17 March 1996 as a dry well.

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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/2695, documented in the API reference.