ID: 3
OBJECTID: 3
wlbNpdidWellbore: 4
wlbName: 30/6-12
wlbHistory:

General

The appraisal well 30/6-12 was drilled in a down flank position on the Alpha block east of the 30/6-1 Oseberg Discovery well, which tested gas in the Middle Jurassic Brent Group. The main objectives of the well were to confirm the reserves of hydrocarbons, to prove oil in the Etive Formation, to define and refine the geological model for the Alpha structure, to obtain core from the Brent Group, and to do a water injection test in the oil zone. The well was planned to be drilled 50 m into the Drake Formation to a total depth of 2764+/- 50 m.

Operations and results

Well 30/6-12 was spudded with the semi-submersible installation Treasure Seeker on 20 February 1983. Drilling operations went without significant problems down to 615 m. The 20" casing was set with shoe at 600 m. During the subsequent landing of the BOP on the well head, the ball joint parted, and the BOP fell down on the wellhead. The wellhead was so badly damaged that the well had to be abandoned: Final TD of the well thus became 615 m in Pliocene sediments; prospective depth was not reached.

Top Pliocene was encountered at 350 m.

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

The well was permanently abandoned on 9 March 1983 as a junk well. Replacement well 30/6-13 was spudded two days later on a location ca 40 m to the south-west of 30/6-12

Testing

No drill stem test was performed.

wlbHistoryDateUpdated: 2016-05-19T00:00:00