French oil and energy group Total said on Monday it had made a major gas discovery on the Glendronach prospect, located off the coast of the Shetland islands in the North Sea.
Total said preliminary tests on the new gas discovery confirmed good reservoir quality, permeability and well production deliverability, with recoverable resources estimated at about one trillion cubic feet (1 tcf).
It said Glendronach, located near its Edradour field, will be tied back to the existing infrastructure and developed quickly and at low cost.
Total said the discovery will extend the life of the West of Shetland infrastructure and production hub which includes the Laggan, Tormore, Edradour & Glenlivet fields, as well as the Shetland Gas plant, all of which contribute to about 7 percent of the UK gas consumption.
"Glendronach is a significant discovery for Total which gives us access to additional gas resources in one of our core areas and validates our exploration strategy," Arnaud Breuillac, President of Total's Exploration & Production division, said in a statement.
Wood Mackenzie North Sea research analyst Kevin Swann said it was the largest conventional discovery in the United Kingdom since Culzean in 2008, and it could contribute as much as 10 percent of the UK's annual gas production in its early years.
"Exploration in the UK has been a huge concern so far in 2018 with just five exploration wells spudded to date – on track for lowest levels of activity since the 1960s. So this discovery is welcome news," Swann said in a statement.
He said that although the West of Shetland region was under-explored, it was core for oil majors BP, Shell , Total and Chevron, and large development projects were expected to boost production from it through to the mid-2020s.
Total has a 60 percent stake in Glendronach, while Ineos E&P UK Ltd and SSE E&P UK Limited each hold 20 percent stakes.
Total shares were up 0.9 percent by 1418 GMT.
(Reporting by Sudip Kar-Gupta and Bate Felix; Editing by Emelia Sithole-Matarise/Keith Weir)
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