Respol Sinopec is expected to resume investigations today after a supply boat vessel spotted an oil sheen near its Montrose Alpha and Arbroath platforms in the UKCS North Sea.
Production will remain shut-in for the fourth day, after the alarm was raised on 10am Saturday.
A spokesman said: “The investigation is continuing; as yet no further evidence has emerged as to the source of the sheen.”
Dive Support Vessel (DSV), the Seven Falcon, has been on site since 7am on Sunday, 11 March, equipped with a Remotely Operated Vehicle (ROV) to investigate the source of the sheen.
Neither platform needed to be down manned.
Respol Sinopec is working with the Department of Business, Energy and Industrial Strategy as it continues to deal with the incident.
The Montrose and Abroath platforms make-up are located 200km east of Aberdeen. They are part of the Montrose Area Redevelopment (MAR), which will unlock an additional 100 million boe of reserves and extend the life of the Montrose Area to beyond 2030.
MAR involves significant modification and expansion of the existing Montrose Area infrastructure, including the development of three new fields – Godwin, Cayley and Shaw.
The Montrose Alpha is one of the North Sea’s oldest platform. It was installed in 1976.