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Woodside Pipeline IMM Plan Updates

Woodside Pipeline IMM Plan Updates

Benefits
The updated Inspection, Monitoring and Maintenance (IMM) Plans achieved:
• Improved alignment with the Risk Based Inspection process. • Clarity regarding operational practices. • Streamlined anomaly reporting and acceptance criteria via un-ambiguous language. • Ease of reference for pipeline design details. • Thorough coverage of modifications and additions to pipeline systems. • Current acceptance criteria using the latest engineering results.
Background
IMM Plans are established to support production maintenance and inspection processes and involve a risk assessment and management approach to define the IMM requirements for a system. These requirements also include requirements of Pipeline Licences, Legislation or other external sources such as Codes and Guidelines. The Plans are developed for each subsea and pipeline facility, and these provide a ‘roadmap’ for the IMM requirements specific to that facility.
Work Performed by Atteris

Five Pipeline IMM Plans were updated to include a significantly greater level of detail, including the incorporation of all pipeline system modifications and the latest engineering assessment results. The activities included:

  • Reviews of the pipeline Risk Based Inspection Reports and incorporation of the damage-loop structure into the IMM plans.
  • Discussions and reviews with Woodside’s pipeline operations team in order to confirm actual practices for process monitoring, and accurate references for anomaly criteria and process data.
  • All anomaly acceptance criteria was reviewed and re-worded to be objective and as precise as possible.
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