The world’s second largest crane vessel was contracted this week by Statoil to lift and transport the 10,600 ton topsides module into position atop the Gudrun jacket in the Norwegian North Sea. The vessel departed Aibel’s shipyard in Haugesund and arrived on station 25 hours later.
“The operation has been safe and efficient with favourable sea conditions,” commented Ã˜yvind Haugsdal, transport and installation manager for the Gudrun project. “It was an incredible feeling to watch it all go as planned.”
Haugsdal has been planning this lifting operation for the last three and a half years.
After the topsides were positioned in place, the platform’s distinctive flare tower was installed which reached into the sky 232.5 meters above the sea.
Statoil plans to start up production at this facility in the first quarter of 2014, at which point they will start paying off the NOK 19 billion investment they will have made into the development of the field. They note that this price is NOK 2 billion less than planned however.
“We were given good prices when we awarded the contracts in 2010, in a market characterised by the financial crisis,” says Margaret Ã˜vrum, executive vice president for Technology, Projects and Drilling in Statoil.
Discovered in 1975, Gudrun is an oil and gas field situated in the middle of the Norwegian part of the North Sea (license area PL025). The field is situated approximately 55 kilometers north of the Sleipner installations.
The extractable reserve is 126.5 million barrels of oil equivalent (around 2/3 oil, 1/3 gas and NGL)
Gudrun has a process facility for partial stabilisation of oil and gas. Transport of oil and gas to the Sleipner A platform Oil is transported to KÃ¥rstÃ¸ while the gas is transported to the European markets via gas pipes connected to Sleipner.
The reservoir is situated at a depth of 4,200-4,700 metres and dates back to the Jurassic period. The pressure in the reservoir reaches as much as 860 bar, with a temperature of up to 150 degrees Celsius.
The platform is equipped with 16 well slots and a total of 7 production wells will be drilled. Available slots may be used for further wells to further increase production from Gudrun or wells from other fields.
110 kilometres of pipelines (two pipelines of 55 kilometres each) have been laid in the sea bed between Gudrun and Sleipner, as well as 55 kilometres of power cable.