Appraisal well confirms significant discovery at Dugong

Neptune Energy will link its North Sea Dugong discovery to nearby infrastructure or pursue a standalone development after appraisal well (34/4-16 S) resulted in an updated recoverable resource volume estimate of 40-108 MMboe (OGJ Online, July 30, 2020; Jan. 7, 2021). The main objective—to delineate the discovery made in the Rannoch formation in wells 34/4-15 S (Dugong) and 34/4-15 A (Sjøpølse) in production license 882—was achieved by establishing the oil water contact.

The well encountered a 25-m oil column in the Rannoch formation, 22 m of which consists of sandstone of primarily moderate reservoir quality. The oil-water contact was encountered at a vertical depth of 3,443 m subsea, the Norwegian Petroleum Directorate noted in a Mar. 30 release following Neptune’s Mar. 29 statement.

The revised estimate is subject to further detailed analysis and review. A drill stem test on the well is planned at a later stage.

Dugong, 158 km west of Florø, Norway, lies at a water depth of 330 m, and is close to existing production facilities of Snorre and Statfjord fields. The reservoir lies at a depth of 3,250-3,500 m.

Well 34/4-15 S proved oil in reservoir rocks from the Middle Jurassic Rannoch formation. Well 34/4-15 A confirmed the oil discovery in the Rannoch formation and also proved an oil column in reservoir rocks from the Late Jurassic (most likely also Rannoch formation), NPD said.

Dugong license partners are Neptune Energy (operator, 45%), Petrolia NOCO (20%), Idemitsu Petroleum Norge (20%), and Concedo (15%).