Gudrun jacket installed

The steel support structure for the Gudrun platform is now in place on the North Sea field, completing the first phase of the extensive installation work being carried out there.

”The entire operation has been carried out according to plan and in a secure manner,” reports Anders Opedal, senior vice president for projects in Statoil’s Technology, Projects and Drilling business area.

“We’ve passed an important milestone for coming on stream at the right time and to budget. With the jacket solidly positioned on the seabed, we’ll be able to start drilling in the fourth quarter as planned.”

Installation of the steel structure began on 24 July, and the job of attaching it to the seabed was completed on 2 August when the last of 12 60-metre piles was driven home.

Saipem 7000, the world’s second-largest crane vessel, has been used to carry out the installation work on Gudrun.

Weighing some 7,000 tonnes all told, the traditional jacket comprises two main structures of almost 2,300 tonnes each, tied together by six horizontal frames and various bracings.

Important contribution
“Gudrun is the first of a number of new installations in an area of the Norwegian North Sea which is both highly interesting and mature,” observes Ivar Aasheim, senior vice president for field development in the Development and Production Norway business area.

“By exploiting existing infrastructure for processing and transport, we’re ensuring production from new fields. Gudrun will also make an important contribution to maintaining high production levels going forward.”

The next development milestone is the start of pre-drilling production wells on the field. These will be tied back to the platform for partial processing and oil and gas export.

Final processing of Gudrun’s output will take place on Sleipner A, with the gas piped to the adjacent Sleipner T platform for carbon dioxide removal.

In addition, electricity to operate the Gudrun installation once it comes on stream in two years’ time will be supplied from Sleipner A.

Gudrun ranks as one of Statoil’s largest development projects on the Norwegian continental shelf, and contains some 127 million barrels of oil equivalent.

About Gudrun
Oil and gas field in production licence 025 in the central Norwegian North Sea, about 55 kilometres north of the Sleipner installations
Licensees in PL 025: Statoil (operator) 75%, GdF Suez 25%
Developed with a jacket-supported production platform
Process facilities for partial stabilisation of oil and gas
40-berth living quarters
Transport of oil and gas to Sleipner A
Power supplied by cable from Sleipner A
Total investment framework of roughly NOK 21 billion
Oil and gas will be produced from Jurassic reservoir rocks
Located 4,200-4,700 metres down, the reservoir has pressures up to 820 bar
The platform will have 16 well slots. Plans call for seven production wells. The other slots can be used for further drilling to boost Gudrun output or for wells on other fields
Due to come on stream in 2014