Statoil, operator of production license 303, has completed the drilling of wildcat well 15/6-12, located about 12 kilometers north of Sleipner Vest in the central part of the North Sea.
The purpose of the well was to prove petroleum in Middle Jurassic reservoir rocks (the Hugin formation). The secondary exploration target was to prove hydrocarbons in rocks from the Lower Jurassic and Triassic Ages (the Sleipner formation and the Skagerrak formation).
The well encountered oil in a four-meter column in the Hugin formation in reservoir rocks of poorer reservoir quality than expected. No hydrocarbons were encountered in the Sleipner and Skagerrak formations. The well was not formation-tested, but extensive data acquisition and sampling have been carried out. Preliminary estimates place the size of the discovery between 0.2 and 1 million standard cubic meters (Sm3) of recoverable oil, which is not commercially interesting.
15/6-12 is the fifth wildcat well in production license 303, awarded on December 12, 2003 (APA 2003). The well was drilled to a vertical depth of 3906 meters below sea level, and was terminated in the Skagerrak formation in the Upper Triassic. The water depth at the site is 115 meters. The well has been permanently plugged and abandoned.
Well 15/6-12 was drilled by the Transocean Leader drilling facility, which will now proceed to production license 429 in the Norwegian Sea to drill wildcat well 6407/4-2, with Statoil Petroleum AS as operator.
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