StatoilHydro ASA has located gas in the Harepus prospect in the Norwegian Sea and the Corvus prospect in the Oseberg area of the North Sea, the company announced.
Located in middle Jurassic rocks, the Harepus discovery lies 7km south of the Mikkel field.
So far no formation testing has been done but extensive data and cores have been collected. The discovery well was drilled in 247m of water to a total depth of 3,162m beneath the sea surface and terminated in early Jurassic rocks.
“Preliminary calculations indicate 0.5 to one billion standard cubic meters of recoverable gas,” said head of infrastructure-led exploration on the Halten Bank, Sivert Jorgenvag.
“A tie-back to Asgard together with the Gamma discovery made in the same licence in 2008 will be considered,” he said.
It will now be permanently plugged before Ocean Vanguard leaves the location to drill an exploration well for StatoilHydro on production licence 159D in the Norwegian Sea.
The Corvus exploration well was drilled about 7.5km north-west of Oseberg C and proved small quantities of gas in the upper Jurassic Draupne formation.
The company said that reservoir thickness remains unclear because the well could not be drilled deeper for technical reasons.
The well was drilled from Transocean Winner in 113m of water to a vertical depth of 3,991m and will now be permanently plugged and abandoned.