‘Vital non-compliance’ behind delay to Tolmount start-up


An in depth timeline of the occasions that delayed the start-up of Harbour Power’s Tolmount gasoline subject has been printed.

In its annual report and accounts, Dana Petroleum, which has a 50% stake within the Southern North Sea undertaking, revealed a “important non-compliance” with a key piece of equipment was accountable.

Manufacturing from Tolmount had initially been on the slate for July 2021, however start-up was pushed again, and it didn’t go stay till April 2022.

On the time, London-listed Harbour (LON: HBR) blamed the delay on faults with offshore electrical techniques that had cropped up throughout ultimate commissioning and testing.

Dana, owned by Korean Nationwide Oil Firm (KNOC), has now make clear the dimensions of the gear glitches that had been uncovered.

Large points uncovered

In late June 2021, impartial verification physique DNV recognized a big non-compliance with the ATEX – “certification laws for gear being utilized in hazardous/explosive atmospheres” – throughout a verification go to to the Tolmount platform.

Harbour then commissioned an ATEX specialist to conduct a “detailed inspection” throughout all electrical gear objects on the set up.

The Tolmount topsides and jackets on a barge in Italy.

That flagged a “important failure fee”, and it was then agreed between events {that a} “full inspection” was wanted – it was accomplished in This fall 2021.

Rectification of all failures was full within the first quarter of 2022, earlier than full commissioning was carried out.

First gasoline was then achieved on April 24.

A troublesome begin to life

The delays resulted in an “elevated forecast for expenditure” to finish the undertaking, one thing that was authorised by the Dana board in December 2021.

Round that very same time a downgrade of subject reserves at Tolmount was additionally introduced – it was reported that the drop could possibly be between 20 million and 30m barrels of oil equal (boe).

The sector had been anticipated to supply round 90m boe in whole, at peak charges of round 28,000 boepd, in line with earlier steering.

Harbour Power operates Tolmount with a 50% stake.

Dana and Kellas Midstream struck an progressive infrastructure deal to collectively construct and personal the platform and export pipeline, referred to as the Humber Gathering System (HGS).

Offshore Design Engineering (ODE) was appointed as set up operator for the HGS infrastructure.

Tolmount East

Dana additionally revealed in its annual report that “glorious progress” has been made in shifting the Tolmount East discovery ahead.

A subject growth plan (FDP) for the undertaking was lodged with the regulator in February final yr, and growth consent was obtained just a few months later.

Tolmount East will likely be developed as a tie-back to the present Tolmount undertaking and is concentrating on round 53m boe in gasoline and condensates.

First gasoline is on the slate for Q3 subsequent yr.

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