To date, the oil and gas industry has struggled to employ structural monitoring data in meaningful way. The missing link has been the ability to extract and interpret useful information from the data and apply it in a manner that has a significant impact on productivity and utilization. To design and install successful monitoring systems, engineers with knowledge and experience in signal processing and data acquisition, as well as the mechanics of offshore systems, are needed throughout the entire program.
In this article we explore two case histories whereby in-service measured data was coupled with engineering assessment to increase asset utilization. In the first case study measured waves and tendon tensions at a Tension Leg Platform (TLP) in the Gulf of Mexico (GOM) are compared with design data to determine the level of conservatism in design. Results are intended to feed into a CS assessment. In the second case study measured vibrations of a subsea well jumper are used to refine a Finite Element (FE) model and determine the dynamic forcing function, such that the predicted vibration response matches the measured vibration response. Results from the correlated FE model are used for fatigue assessment.
data acquisition, TLP, FPS, floating production, subsea
McNeill, S., Bhalla, K, “Cracking the Code: How Measured Data Coupled with Engineering Analysis can Increase Asset Utilization,” Offshore Engineering, April, 2016, pages 28-30.