Statoil hits oil, gas southwest of Johan Castberg
STAVANGER, Norway -- Statoil Petroleum AS, operator of production license 532, has completed the drilling of wildcat well 7220/7-3 S. The well has been drilled in the Barents Sea, about 15 km southwest of the 7220/8-1 Johan Castberg discovery and 230 km northwest of Hammerfest.
The well' s primary exploration target was to prove petroleum in reservoir rocks from the Middle and Early Jurassic Age (the StØ and Nordmela formations). The secondary exploration target was to prove petroleum in reservoir rocks from the Late Triassic Age (the Fruholmen formation).
The well encountered a 68-m gross gas column in the StØ formation and an 86-m gross oil column in the StØ and Nordmela formations. The reservoir quality in the StØ formation is very good. The reservoir quality in the Nordmela formation is variable, but about half of the oil zone was encountered in sandstone with very good reservoir quality. The Fruholmen formation has poor reservoir properties, and is aquiferous.
Preliminary calculations of the size of the discovery are between seven and ten million standard cubic metres of recoverable oil equivalents.
The well was not formation tested, but extensive data acquisition and sampling have been carried out. The discovery will be considered for tie-in to 7220/8-1 Johan Castberg.
This is the seventh exploration well in production license 532. The license was awarded in the 20th licensing round in 2009.
The well was drilled to a vertical depth of 2,029 m below the sea surface and was terminated in the Fruholmen formation from the Late Triassic. Water depth at the site is 345 m. The well will now be permanently plugged and abandoned.
Well 7220/7-3 S was drilled by the West Hercules drilling facility, which will move on to assignments outside the Norwegian shelf.