The Petroleum Safety Authority Norway (PSA) has carried out an audit of Equinor and their management of barriers at the Oseberg field centre. The audit was conducted from 29 November to 3 December 2021.
The objective of the audit was to verify that Equinor's management and follow-up of barriers at the Oseberg field centre (Oseberg A, B and D), whether technical, organisational or operational, comply with the company's and the authorities' requirements.
The audit identified four non-conformities. These concerned:
- Consequences of worst credible process fire (WCPF)
- Lack of independence between emergency shutdown and process safety systems for well valves
- Incident notification procedure
Lack of training in and verification of performance requirements for operational and organisational barrier elements
We also observed six factors we have chosen to categorise as improvement points. These were:
- Deficiencies in process safety the response time for some process shut-off valves is too long relative to estimated need
- Deficiencies in process safety weaknesses in the design of overpressure protection
- Follow-up of measures in Synergy
- Frequency of TTS verification at the Oseberg field centre
- Evacuation routes
- Fire doors
What happens now?
We have asked Equinor to report on how the non-conformities and improvement points will be addressed.