Investigation Summary Report – Uncontrolled HC Release ( PDF 322KB )

Written by Claude Haiku 4.5 from the extracted text on 27 Feb 2026. It can miss or misread redacted and scanned pages. Check the source before relying on it.

NOPSEMA's investigation summary documents a hydrocarbon release incident at Woodside Energy's CWLH OKHA FPSO on 7 October 2011. A fire and gas detection system activated following a small gas release in a pressure vessel breaker, triggering emergency response procedures and personnel muster. The facility returned to normal operation with no injuries reported. Initially classified as a low-potential incident, NOPSEMA escalated the case to a full offshore investigation due to reporting inconsistencies and classification ambiguities—the notification lacked contact details, the Regulatory Services Authority was not initially advised, and subsequent reports conflictingly described the release as major. NOPSEMA appointed a lead OHS inspector to conduct a preliminary inquiry to clarify the sequence of events, assess potential breaches of duties under the Offshore Petroleum and Greenhouse Gas Storage Act, and determine whether further enforcement action was warranted based on the major release classification and