Asset and Integrity Management System Design – Wheatstone


The Wheatstone development is designed for a field life of 30 years. The subsea scope consists of the following:

    • 3 initial and 3 future subsea drill centres; Total of 23 trees, flowline jumpers and manifolds
    • Infield pipelines between drill centres and the platform facility
    • Wheatstone Platform Steel Gravity Structure (GBS)
    • 225 km, 44-inch carbon steel subsea export trunkline

Atteris was engaged to develop the through-life Asset and Integrity Management System and documentation for the subsea, flowlines and Trunkline assets for the upstream system.

Work Performed by Atteris

Working as part of an integrated team with Chevron, Atteris worked to:

    • Define the Inspection Monitoring Maintenance and Repair (IMMR) Strategy
    • Define the Asset Integrity Management (AIM), Risk Directed Integrity Management (RDIM) and Risk Based Inspection (RBI) processes and methodologies
    • Comply with the Chevron AIM process, the Surface Equipment Reliability and Integrity Process (SERIP), and the Wheatstone Asset Integrity Implementation Plan
    • Provide decision-making tools to enable risk-based AIM and IMM plans to be developed

Atteris led and facilitated pipeline risk workshops to identify system gaps, high risk areas, and components which require specific asset and integrity management, together with providing interdisciplinary checking on design and operational documentation. Atteris delivered the:

    • Risk Directed Integrity Management (RDIM) Methodology
    • Subsea System Inspection Monitoring Maintenance and Repair (IMMR) Strategy and Plan
    • Corrosion Management Strategy and Plan
    • Phase 4 Pipeline Risk Review Workshop
    • Phase 5 Subsea and Pipeline Risk Assessment Workshop


Integrating Atteris’ vast experience of Asset and Integrity Management and Engineering Design, Atteris was able to work with the client in the development of a comprehensive management system which included risk base inspection methodologies. The subsea system was systematically deconstructed and integrity management issues address by component, area, and task. Positive feedback was received by operations for the structure and specific nature of the plans.