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Audit of ExxonMobil – barrier management

We have carried out an audit of barrier management in the operations at Ringhorne.

Ringhorne is operated by ExxonMobil, and is part of the Balder field, in the central North Sea. Ringhorne has been developed using a combined accommodation, drilling and wellhead facility. Production began in 2003.

From 16 May to 1 June 2017, we carried out an audit of Ringhorne. During the audit, we examined how ExxonMobil is providing for and ensuring compliance with requirements for barriers and barrier management within the disciplines of safety instrumented systems, ICT security, process safety and technical safety.

The objective of the audit was to assess how the operator is ensuring compliance with the authorities' regulations, recognised standards and its own barrier management requirements for the operation and management of Ringhorne.

The audit identified three regulatory non-conformities. These concerned follow-up of performance requirements, performance requirements and penetrations in fire walls. We also found four improvement points. These included automatic fire water discharge in the event of confirmed gas detection, passive fire protection, gas detection and response time for PSD (process shutdown) functions.

We have asked ExxonMobil to report on how the non-conformities will be dealt with. The deadline for this has been set at 31 August 2017.

Øyvind Midttun, press contact
Email: oyvind.midttun@ptil.no | +47 51 87 34 77