The Maersk Gallant drilling rig in the North Sea. Image courtesy of Ole Jørgen Bratland/Statoil ASA.
 Norway’s Statoil Petroleum scored a gas and condensate find at its wildcat well 2/4-23 S in the Norwegian North Sea.
The well was drilled in the Staoil operated production license 146, 10 miles northeast of the Ekofisk field, near the King Lear discovery in the southern part of the North Sea, the Norwegian Petroleum Directorate said.
The primary exploration target for the well was to prove petroleum in Upper Jurassic reservoir rocks, within the Ula formation, and in Middle Jurassic reservoir rocks, within the Bryne formation.
The well was also drilled to delineate the 2/4-21 discovery, known as King Lear, that was proven in Upper Jurassic reservoir rocks within the Farsund formation in the summer of 2012.

The secondary exploration target for 2/4-23 S was to prove petroleum in Upper Triassic reservoir rocks, within the Skagerrak formation.

In the primary exploration target, the well encountered 134 feet of gas/condensate-filled sandstone rocks in the Ula formation, with “moderate” reservoir quality.

The petroleum/water contact was not encountered.

Preliminary estimates place the size of the discovery at between 2.5 and 12 million standard cubic meters of recoverable oil equivalents.

The well also encountered 98 gross feet of water-filled sandstone with “poor” reservoir quality in the Bryne formation.

Well 2/4-23 S also encountered a 65 foot thick gas/condensate column in the Farsund formation, in two zones of 16 foot thick reservoir rocks with “moderate/good” reservoir quality, that confirmed pressure communication with the 2/4-21 King Lear discovery.

Before well 2/4-23 S was drilled, Statoil’s resource estimate for King Lear was between 11 and 32 million standard cubic meters of recoverable oil equivalents.

“It is expected that the King Lear volumes will stay within the previously communicated range of 70-200 million barrels of recoverable oil equivalent,” Norway’s Statoil said.

The Skagerrak formation had “poor” reservoir quality and was water-filled.

The well was not formation-tested, but extensive data acquisition and sampling have been carried out.

The licensees will assess the discoveries together, with a view toward an optimal development.

Well 2/4-23 S was drilled to a vertical depth of 18,202 feet below the sea surface, and was terminated in sandstone in the Skagerrak formation in the Upper Triassic.

Water depth at the site is 223 feet.

The well will now be permanently plugged and abandoned.

“The King Lear and Julius discoveries are located in one of the most mature parts of the Norwegian continental shelf – just 20 kilometers north of Ekofisk, the first commercial NCS discovery made 45 years ago. The discoveries confirm Statoil’s view that even such mature areas of the NCS still have an interesting exploration potential,” Statoil vice president for exploration in the North Sea May-Liss Hauknes said.

Well 2/4-23 S was drilled by the Mærsk Gallant, that will now proceed to PL 018 to do well work on the Eldfisk field in the North Sea.

Statoil holds a 77.8 percent operating stake in PL 146.

Total E&P Norge holds the remaining 22.2 percent interest.


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