Learning from offshore field performance
Learning from offshore field performance
This paper, the written version of the 7th ISSMGE McClelland Honor Lecture, documents and shares the learnings from the field performance of full-size offshore foundations under installation and operation loads. It details the events that led to the buckling of driven piles at the Valhall field during installation and compares the measured performance of MODUs anchors and mooring systems, jackets, and free-standing caissons to North Sea and Gulf of Mexico extreme environmental loads. It shows that the predicted performance of these structures is consistent with the field observations, if modern approaches to foundation modelling are used.
In addition, rather than focusing on natural geohazards as is often the case in the literature, the paper addresses anthropogenic geohazards by publishing two case histories where deepwater seafloor instabilities were triggered by human activities. Hard grounds and seafloor alterations resulting from drilling activities and the hazard they pose are also discussed.
Philippe Jeanjean; K. Hampson; L. Majzlik; J. Bronikowski; Arash Zakeri; A. W. Hill
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
McClelland Lecture
https://doi.org/10.53243/ISFOG2025-653
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