Over the past several years, the focus of the oil industry has shifted towards Integrity Management (IM) of offshore platforms. A typical IM program of an offshore platform covers subsea equipment, riser/flowline, processing facilities and topsides. However, the integrity of the riser system is especially critical due to its complex dynamic response and as failures have potential to cause significant impact on life and environment. As part of Chevron's IM efforts on their deepwater floating systems, Chevron has instrumented one of its deepwater GoM platform SCRs with motion and strain monitoring devices. A key objective of the SCR monitoring program is to ensure that the response of the production riser is within safe operating conditions and pre-emptively identify any potential threats to riser integrity. To maximize the benefits of the SCR IM program, riser monitoring data is processed in conjunction with prevalent environmental, vessel and riser operating conditions. Typically a riser design process contains a standard set of requirements, based on environmental and vessel conditions, that need to be satisfied before the riser is deemed suitable for use. As part of the SCR IM program, additional factors unaccounted during riser design have been identified that have an impact on riser response. Hence the value of a riser monitoring program to account for the limitations of the riser design process and to confirm the overall integrity of the riser system is established. This paper discusses the methodology used and provides a summary of key findings from the processing of field measurements. The importance of monitoring will be highlighted and recommendations to operators for future integrity management programs will be provided.
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