Risk assessment in the maintenance of offshore caisson operations
Citation
Source Title
ISSN
School
Collection
Abstract
Undertaking maintenance of offshore caissons is a pervasive challenge that involves an array of risks and uncertainties. Despite the adoption of standardised and routine maintenance procedures that are subject to on-going improvements, the rate of failure in offshore caissons remains relatively high. To manage the effect of risk and uncertainties associated with the maintenance of offshore caissons, expert judgment can be drawn upon to better understand and capture the issues that contribute to their failure. Using a case study of an offshore hydrocarbon discharge caisson in the North Sea of the United Kingdom, expert judgements from industry practitioners are obtained using the Delphi Interview and Analytic Hierarchy Process (AHP) technique to rank 14 possible recovery options. Sensitivity analysis is used to ascertain the suitability of each of the options. Results reveal that the Delphi technique employed provided a robust means to garner invaluable insights from experts about the issues associated with caisson failure. The corollary is the development of a framework that serves as a point of reference to identify and assess the risks in offshore caisson maintenance operations. This framework can also be used in conjunction with existing probabilistic methods to improve the effectiveness of decision-making during operations and maintenance.
Related items
Showing items related by title, author, creator and subject.
-
Aja, Aja; Ramasamy, M. (2016)Hydrocarbon transport system in oil and gas industry faces major challenges of flow blockage resulting from hydrates formation and wax depositions. To ensure efficient and economical hydrocarbons transport from wellhead ...
-
Mazzarol, Timothy W. (1997)The principal focus of the present study was to examine the factors critical to the development and maintenance of a competitive advantage for education institutions operating in international markets. International ...
-
Tan, Y.; Song, Y.; Zhu, J.; Long, Q.; Wang, Xiangyu; Cheng, J. (2018)As the coming decades will witness a big trend in the decommissioning of offshore platforms, simultaneously disassembling topsides of multiple offshore platforms is getting increasingly common. Considering high risk and ...