Hydrocarbon release in D4CN

Cause & Consequence

• Uncontrolled release of a flammable gas or liquid

Incident Location

Floating production/storage unit

Incident Activity

Production operations

Specific Incident Equipment

Lessons Identified

·Pipe on dead leg – Operation line up created dead leg.

·Pipe material/lining unsuitable for service - Original design may not have taken account of increased levels of SRBs during later platform life.

·SRBs present in pipe work – Inadequate implementation of controls. Topside process had previously been routinely biocided but this had not been carried out for some considerable time.

·Pipe not inspected – Insufficient inspection to prevent pipe failure.

Incident Recommendations

·Review dead leg survey to determine whether operational dead legs have been included.

·Identify correct piping material for current service. Ensure replacement spool is suitable for service.

·Confirm suitability of current biociding regime and amend if necessary.

·Review inspection frequency for this pipe work. Amend if necessary.

·Ensure Flare Gas Knock Out Drum drain pipe work is on inspection program.