StatoilHydro plans Kristin field workovers

StatoilHydro has let Aker Solutions a contract for a complete workover system for subsea trees in high-pressure/high-temperature Kristin gas and condensate field in the Norwegian Sea.

By OGJ editors
HOUSTON, Mar. 30 -- StatoilHydro has let Aker Solutions a contract for a complete workover system for subsea trees in high-pressure/high-temperature Kristin gas and condensate field in the Norwegian Sea.

After coming on stream in November 2005, Kristin field produced an average 44,400 boe/d of oil and gas in 2006 and 87,000 boe/d in 2007. In the first quarter of last year, average output reached 109,200 boe/d. But it declined during the year to a fourth-quarter average of 72,100 boe/d—of which 45,100 b/d was light oil.

In January this year, StatoilHydro shut in the field for 16 days for replacement of parts of the platform's lifeboat system.

The Kristin reservoir lies 4,500 m below the seabed in 380 m of water in the southwestern part of Halten Bank. It produces through 12 wells, most of them highly deviated, in four subsea templates tied back to a semisubmersible platform. The reservoir has temperatures and pressures as high as 180° C. and 15,000 psi.

Stabilized condensate moves from the Kristin platform to a storage vessel shared with Aasgard field. Rich gas moves from the platform by pipeline to the gas processing plant at Karsto, Norway.

The new workover system will be the third Aker Solutions has delivered to Kristin. The contract value is 330 million kroner ($50 million).


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