ESG Poster ESG1: Design for decommissioning – focusing on preventative strategies and beneficial impact assessment for managing offshore infrastructure in situ
Alison J. Duguid A *A GHD Pty Ltd, Perth, WA, Australia.
The APPEA Journal 62 - https://doi.org/10.1071/AJ21426
Published: 3 June 2022
Abstract
Poster ESG1
Offshore oil and gas infrastructure removal can have significant impact to newly developed ecological services, human safety, fuel consumption emissions and unrecoverable costs. Through Net Environmental Benefit Analysis-Comparative Assessments (NEBA-CA) it is evident that in situ alternatives can alleviate some of these impacts. In situ management of infrastructure is currently restricted by state, commonwealth and international legislation in Australia resulting in the base-case of full removal often being favoured. The default to full removal is often due to areas of uncertainty such as long-term infrastructure stability, polymer and material degradation, intergenerational eco-toxicological impact and commercial fisheries risks. This paper will present front-end design alternatives to address these areas of uncertainty and provide a more robust justification for leaving infrastructure in place post decommissioning.
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Keywords: design for decommissioning, innovative solutions, manage in situ, material degradation, Net Environmental Benefit Analysis‐Comparative Assessments (NEBA‐CA), offshore decommissioning, substructures and pipelines, sustainable decision making.
Alison J. Duguid is GHD Pty Ltd’s offshore decommissioning comparative assessment project lead with experience in delivery of multiple studies assessing the net impact and benefit of different decommissioning options. Her role included leveraging of previous experience in safety risk and climate risk assessment to provide a fresh perspective on alternative decommissioning activities. Using her Masters in Professional Engineering (majoring in chemical engineering), Alison has also been involved in numerous projects from hydrogen energy feasibility studies to end-of-life material recovery and circular economy-based principles. |
