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The Vallhall field. Image courtesy of Aker BP.

Aker BP said on Thursday that production at the Valhall field has climbed past the 1 billion barrel mark.

Aker said that Valhall and Hod have now produced over one billion barrels of oil equivalents.

That figure is more than three times the amount that the area was expected to produce when the field opened in 1982.

Hod produces via Valhall and has delivered over 75 million barrels of oil equivalents, or more than twice the estimated oil at field start-up in 1990.

Hod is normally an unmanned wellhead platform that is remotely controlled from Valhall.

Production ceased from the Hod platform in 2012.

The Hod licence currently produces from wells drilled from Valhall Flank South Platform.

Valhall’s oil and gas is produced from chalk reservoirs sitting about 8,200 feet below the seabed in the southern part of the North Sea.

Aker said that the activity level on the field has been high, with almost continuous drilling since start-up.

The company added that seismic and well technologies have been “key leavers” for developing the field.

The current well stock comprises 55 active wells out of a total of nearly 150 productive wells drilled since field discovery.

Aker has also acquired 18 seismic 4D seabed surveys of the area since 2003.

The Valhall complex currently consists of six separate steel platforms connected by footbridges.

The field also has two unmanned flank platforms.

Oil production capacity at Valhall is currently 120,000 barrels per day with daily average production hitting 45,000 boepd in 2016.

Gas handling capacity at Valhall  stands at 4 million standard cubic meters per day.

Aker BP operates Valhall with a 35.9 percent stake and Hess Norway holds a 64.1 percent stake.

“In 1995, work was performed with the goal to extend the field lifetime and recover more than one billion barrels of oil equivalents. We have now achieved this goal 15 years ahead of what was thought at the time. Our new ambition is to further produce at least another 500 million barrels of oil equivalents,” Aker BP senior vice president of operations Eldar Larsen said.