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Equinor's Mariner field offshore UK flows first oil

After reportedly delaying start-up to perform platform safety checks in April, Equinor ASA and its partners said the Mariner field in the U.K. North Sea has produced first oil, according to an Aug. 15 release.

The Mariner field is located on the East Shetland Platform in U.K. Block 9/11a in the northern North Sea, about 150 kilometers east of the Shetland Islands. The field is expected to produce annual average plateau rates of about 55,000 barrels of oil per day and up to 70,000 bbl/d at peak.

Equinor expects the Mariner field to produce more than 300 million bbl of oil over the next 30 years and said it is one of the largest industrial projects in the U.K. in recent years, with a gross investment of over $7.7 billion. More than $1.3 billion worth of contracts have been awarded to U.K. suppliers since the project started, the release said.

"The start-up of Mariner, the first Equinor-operated oil field on the [U.K. Continental Shelf], establishes our foothold in the U.K. and reinforces our commitment to be a long-term energy partner," Equinor Senior Vice President for U.K. and Ireland Offshore Hedda Felin said.

Equinor operates the field with a 65.11% stake. Other partners include JX Nippon Exploration and Production (U.K.) Ltd with a 20% interest, Siccar Point Energy Ltd. with an 8.89% stake and ONE-Dyas BV with a 6% stake.