Norway’s Statoil has had a double success on the Norwegian Continental Shelf (NCS).
Wildcat well 34/8/15 S on production license (PL) 120 proved gas and an appraisal well on the Johan Sverdrup field in PL265 confirmed the extent of the reservoir along the western margin of the field.
The 34/8/15 S well was drilled on the northeast flank of Visund in the northern North Sea using the COSL Pioneer drilling unit.
The well, drilled in partnership with Petoro, ConocoPhillips and Total, encountered a gas column of about 50m in the Brent Group in reservoir rocks with good reservoir quality.
Statoil estimated the discovery to be between 0.7 and 1.6 million cu m of recoverable oil equivalents, which it plans to tie in to existing infrastructure in the Visund area.
The PL265 well on the western part of the Johan Sverdrup field was drilled by the Ocean Vanguard rig.
The main wellbore found a gross 82m oil column in Jurassic sandstones and tested at nearly 6000 bo/d.
A sidetrack 16/2-17B, named Cliffhanger South, did not encounter Jurassic reservoir, and was classified as dry. It had been defined as a separate target in PL265 to Johan Sverdrup.
"Statoil still sees potential in the Cliffhanger North area based on seismic data and our geological models, and will test it with a dedicated well later this summer," says Gro G. Haatvedt, senior vice president exploration Norway.
Sidetrack 16/2-17B also tested also a secondary basement target. Core samples were taken which contained oil shows, but these were confirmed to be non-producible.
Johan Sverdrup (previously known as Aldous/Avaldsnes) is one of the largest discoveries on the Norwegian shelf since the mid-1980s, and was one of the largest discoveries in the world in 2010/2011.
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