RWE Dea discovers Zidane natural gas field in the Norwegian Sea, considers subsea tieback

Sources: Norwegian Petroleum Directorate, Noreco

RWE Dea Norge AS, operator of production license 435, has discovered a major natural gas field with its Zidane-1 wildcat well, 6507/7-14 S, in the Norwegian Sea.

The Zidane-1 discovery well proved natural gas in a 150-meter column in the Fangst Group. The Tilje formation is water-bearing. Preliminary estimates place the size of the discovery between 5 and 18 billion standard cubic meters of recoverable gas. The gas/oil ratio is estimated at 20,000-30,000 cubic meters. 

The Zidane-1 well was drilled by the Bredford Dolphin to a vertical depth of 4477 meters below the sea surface, and it was terminated in the Tilje formation in Lower Jurassic reservoir rocks. Water depth at the site is 344 meters. The well will now be permanently plugged and abandoned. 

The well’s primary exploration target was to prove petroleum in Middle Jurassic reservoir rocks (the Fangst group). The secondary exploration target was to prove petroleum in Lower Jurassic reservoir rocks (the Tilje formation). 

Extensive data acquisition and sampling have been carried out, and a successful formation test has been performed. The maximum production rate was 1.2 million cubic meters of natural gas per flow day through a 36/64-inch nozzle. 

Located about 15 kilometers northwest of the Heidrun field and 35 kilometers south of the Skarv field in the Norwegian Sea, the licensees in production license 435 will consider producing the discovery via existing infrastructure. 

The well is the first exploration well in production license 435, which was awarded in APA 2006. RWE Dea is the operator with 40 percent interest. Partners on the license are Noreco with 20 percent, Maersk with 20 percent, and Edison International with 20 percent. 

The Bredford Dolphin will now proceed to production licence 420 in the North Sea to drill wildcat well 35/9-6 S, where RWE Dea Norge AS is the operator.

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