Condition Assessment Techniques for Aged Fixed-Type Offshore Platforms Considering Decommissioning: a Historical Review
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REVIEW
Condition Assessment Techniques for Aged Fixed-Type Offshore Platforms Considering Decommissioning: a Historical Review Mohamed Mubarak Abdul Wahab 1 & V. John Kurian 1,2 & Mohd Shahir Liew 1 & Do Kyun Kim 3,4 Received: 6 January 2020 / Accepted: 24 September 2020 # The Author(s) 2020
Abstract In this study, the technical papers on structural condition assessment of aged fixed-type offshore platforms reported over the past few decades are presented. Other ancillary related works are also discussed. Large numbers of researches are available in the area of requalification for life extension of offshore jacket platforms. Many of these studies involve reassessment of existing platforms by means of conducting pushover analysis, a static nonlinear collapse analysis method to evaluate the structure nonlinear behaviour and capacity beyond the elastic limit. From here, the failure mechanism and inherent reserve strength/capacity of the overall truss structure are determined. This method of doing reassessment is described clearly in the industry-adopted codes and standards such the API, ISO, PTS and NORSOK codes. This may help understand the structural behaviour of aged fixed offshore jacket structures for maintenance or decommissioning. Keywords Strength of offshore platforms . Reliability . Jacket platform . Fixed structure, oil and gas . Fixed-type offshore platform . Offshore structures
1 Introduction 1.1 Offshore Jacket Platform In the year 1947, in the coast of Louisiana off Gulf of Mexico (GOM), the first offshore oil and gas platform was born in about 5 m of water depth. Since then, offshore platforms have Article Highlights • Condition assessment (or health monitoring) and life extension techniques are widely reviewed by considering decommissioning of offshore platforms. • The obtained outcomes may help to understand the structural behaviour of aged fixed offshore jacket structures for maintenance. * Do Kyun Kim [email protected] 1
Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
2
Administration Department, Providence College of Engineering, Chengannur 689122, India
3
Group of Marine Offshore and Subsea Technology, School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
4
Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
been used actively in the oil and gas industry for decades. The offshore oil and gas industry was having a steep growth thereafter, and it contributed to 14% of the global production in 30 years. By the year 2010, it increased to about 33% of the global production (Kurian et al. 2012). To date, about 10,000 offshore platforms have been designed and installed throughout the world. The exponential growth of the oil and gas industry was triggered by the development in the energyhungry post world war countries, the massive industrialisation processes in the 1970s and the liberalisation and the phenomenal growth in the econ
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