ID: 379
OBJECTID: 379
wlbNpdidWellbore: 384
wlbName: 30/7-1
wlbHistory:

General

Well 30/7-1 was drilled in the eastern part of the East Shetland Basin in the North Sea. The well location is due west of the Oseberg Field and ca 3.5 km from the UK Border. The primary objective was to investigate structural closure at Eocene and Paleocene with possible sand development.

Operations and results

Wildcat well 30/7-1 was drilled with the semi-submersible installation Polyglomar Driller. Polyglomar Driller was accepted in Verdal on June 28, and left for its first location on June 30, 1975 at 1500 hrs. The rig was on location ready to spud on July 4, after a period of 4 days for movement to location and for anchoring. During the drilling of the 36" hole the drilling template tilted and the entire assembly had to be picked up. The rig was moved 50 ft due east and a new spudding attempt was made on July 5, 1975. Drilling then proceeded without significant problems to 1007 m, which became TD of the well. While pulling out of the hole to set the 13 3/8" casing the pipe stuck in the hole with the bit at 420 m. Numerous attempts to free the pipe were unsuccessful and it was decided to abandon the well. The well was drilled with seawater/sweeps and gel from surface to TD.

The penetrated sediments are interpreted as recent to Miocene in age.

No logs were run in the well. No cores were cut and no wire line fluid samples were taken.

During abandonment the drilling template was found to be stuck and the attempts to recover it were unsuccessful. Divers were jumped to inspect the drilling template and they reported the template had sunk 10 ft below the sea bed. Permission was obtained to fill the cavity above the ba
wlbHistoryDateUpdated: 2016-07-06T00:00:00