Complexity Modeling , Oil & Gas
Seismic Study Independent Review
Italian Seismic Rules (NTC 08) does not give any specific recommendation regarding drilling rigs.
kwantis analyzed the issue with an integrated approach, on one side applying the traditional seismic vulnerability evaluation method, but simultaneously validating all the assumption and results with a probabilistic approach.
Studying the NTC 08, a Derrick is classified as a mobile structure and no further seismic verification should be required, anyway kwantis supported an Italian Oil & Company to review the seismic risk of suc installation.
All design assumptions were checked: load design, loading conditions, limit states evaluations and all structural behavior assumptions, combining them with to the operating conditions of the Derrick, specific to the site and to the loading conditions.
"A comprehensive and accurate evaluation of a seismic risk"
To substantiate all the assumption and to confirm the compliance with Italian Seismic Rules, kwantis evaluated loads conditions using also an accurate source of data: mudlog data. With this approach the real distribution of each load on time could be evaluated in detail.