STAVANGER -- North sea wildcat well 30/5-3 A proved small amounts of gas, but further evaluation is required, according to StatoilHydro Petroleum. The well is located northwest of the Oseberg C platform.
The purpose of the well was to prove petroleum in Cretaceous reservoir rocks. The drilling activity showed that no such reservoir rocks were present, the company says. However, small amounts of gas were proven in reservoir rocks in the Draupne formation from the Late Jurassic. The thickness of the reservoir has not been determined as technical drilling issues prevented deeper drilling. The proven gas-bearing interval is at least 50 m (164 ft) thick and contains gas-filled sand units separated by shaly intervals. The size of the discovery cannot be evaluated until a potential delineation has been conducted, StatoilHydro says.
The well was not formation tested, but extensive data collection and sampling have been carried out. The semisubmersibleTransocean Winner drilled the well to a vertical depth of 3,991 m (13,094 ft) below the sea surface. It was concluded in the Draupne formation in the Upper Jurassic.