ID: 383
OBJECTID: 383
wlbNpdidWellbore: 388
wlbName: 30/7-5
wlbHistory:

General

Well 30/7-5 was a replacement of the well 30/7-4 which was lost due to "twist off" of the drill pipe. The well is located 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 2.5 km from the UK Border. The main objective of the well was to test Middle and Early Jurassic sandstones (Brent Group and Statfjord Formation) Secondary objectives were possible lower Cretaceous carbonate development, and possible Late Jurassic sandstones.

Operations and results

The semi-submersible installation Polyglomar Drilling was skidded over from the junked 30/7-4 well to the position for 30/7-5 by regulating the length of the anchor chains. Well 30/7-5 was spudded with on 5 February 1977 and drilled the 26" section to TD at 805 m in Miocene sediments. When running the 20" casing, the string parted and 18 joints of casing were left in the hole. Attempts to catch the fish failed and the well was given up. The well was drilled with seawater and gel.

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

The well was permanently abandoned on 13 February 1977 as a junk well, and the rig was prepared for spudding replacement well 30/7-6.

Testing

No drill stem test was performed.

wlbHistoryDateUpdated: 2016-07-06T00:00:00