Riser Integrity Monitoring Techniques and Data Processing Methods

Riser integrity monitoring provides critical performance data during day to day operation and in extreme events. In-situ integrity monitoring improves the understanding of the complex riser behavior leading to enhancement of design practices. The paper discusses a range of methodologies for offshore riser monitoring. A review of existing and planned monitoring programs is provided with particular focus on the level of success achieved. Monitoring instrumentation and applications are discussed from the "fit for purpose" perspective, highlighting the monitoring objectives, reliability requirements and offshore operations. The paper also describes data processing methods used for screening and evaluating the collected data. The differences amongst standalone, hardwired, and acoustic data processing and further analysis of the monitoring data are discussed. Hardwired methods are focused on providing information that are relevant for making operational decisions at offshore facilities during day to day activities. Additional onshore data processing is focusing on providing information that can be used in the continuous effort to better understand riser response. In summary, the paper discusses the relative benefits and potential problems associated with hardwired, stand-alone and acoustic monitoring systems in adding value to the integrity management of deepwater risers.