Assessing Optimal and Sustainable Decommissioning Approaches for Fixed Jacket Structures in the Southeast Asian (SEA) Region: A Semi-Quantitative Risk Evaluation

The majority of Southeast Asian (SEA) nations rely on the rules set forth by the Association of Southeast Asian Nations Council on Petroleum (ASCOPE), which strives to manage regional decommissioning concerns, in the absence of comprehensive decommissioning legislation. To further enable efficient and secure offshore and decommissioning execution, even with the ASCOPE guideline, the existing decommissioning legislation must be improved. The originality of this study is in the provision of suggested improvement plans for the SEA region's present decommissioning execution strategy. This approach will also lessen the danger to HSE in offshore and decommissioning operations. To analyse the risk associated with current decommissioning removal techniques, Delphi method was conducted, bringing together experts from the SEA area, including Malaysia, Indonesia, Brunei, Thailand, and Indonesia. These experts came from a variety of backgrounds, including industry, academia, and regulator. We considered three (3) risk factors: financial/economical, environmental, and occupational safety. Based on the Delphi method conducted, we were able to identify the best removal method for decommissioning of fixed jacket structure based on the risk factors listed.