Concept Engineering Studies – Woodside Pluto LNG Project

Background

Upon discovery of the offshore Pluto Gas Field in 2005, operator Woodside Energy Ltd engaged Atteris to assist with concept engineering studies. The key focus area for Atteris during the early concept engineering phase was in relation to the offshore trunkline system.

Work Performed by Atteris

Atteris assisted Woodside pipeline engineers and upstream managers with the selection of the development concept. The work performed included:

  • Pipeline route assessments, including shore approaches and shoreline crossings
  • Attend site visits with Woodside engineers and managers at the potential shore crossing sites on the Burrup Peninsula, West Intercourse Island and Onslow, including meetings with key stakeholders
  • Develop concept engineering designs for pipeline shore approached, pipeline stabilisation and pipeline external impact protection, including crossings of shipping lanes, existing pipeline infrastructure, shoreline crossings and onshore pipeline sections
  • Cost estimating and input into risk assessments
  • Provide input to the development of scopes of work for pipeline route geophysical and geotechnical surveys
  • Provide engineering input into the regulatory approvals document, including attending meetings with regulating authorities.

All this work was undertaken in close collaboration with Woodside team members during the early stages of the Pluto LNG Project.

Benefit

Woodside was able to very effectively utilise the extensive and broad expertise of Atteris in the field of pipeline engineering in the North West Shelf of Australia.

With significant previous project experience on similar projects in the same area, Atteris was able to develop reliable concept engineering solutions for complex problems, such as, a congested nearshore area (Mermaid Sound), a shoreline crossing in an igneous rock area, pre-trenching solutions, and quarry rock sourcing solutions for secondary stabilisation and external impact protection.

Woodside Energy subsequently engaged Atteris for the FEED and Detailed Design phases.