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02/12/2009 Marathon Petroleum Norge AS has completed the drilling of wildcat well 25/4-10 A. The well, which encountered gas, was drilled about six kilometres south of the production vessel on the Alvheim field in the North Sea.
The objective of the well was to prove petroleum in Paleocene reservoir rocks (the Heimdal formation). The well encountered gas in two sandstone layers which were six metres thick in total in the Lista Formation. The reservoir rock is significantly thinner than expected and the size of the discovery is not commercially interesting at this time.
No formation testing was conducted in the well, but limited data acquisition has been carried out. The licensees in the production licence will evaluate the discovery together with the 25/4-3 Gekko oil and gas discovery proven in 1974 and located just east of this well.
Well 25/4-10 A is the seventh exploration well in production licence 203, awarded in the 15th licensing round in 1996. 25/4-10 A was drilled to a vertical depth of 2167 metres below the sea surface, and was terminated in Paleocene rocks (the Heimdal Formation). The water depth is 126 metres. The well has been permanently plugged and abandoned.
The well was drilled by the Transocean Winner drilling facility, which will now proceed to production licence 338 in the North Sea to drill appraisal well 16/1-13 where Lundin Norway AS is the operator.
Contact in the NPD
Eldbjørg Vaage Melberg, tel.+ 47 51 87 61 00