Offshore petroleum production systems are subject to the occurrence of severe slugging, or terrain induced slugging, an unstable flow regime that causes flow oscillations and may result in production shutdown. In this context, active feedback control may be implemented in order to avoid such flow oscillations and obtain the maximum possible production flow rate. For using model-based control, a simplified dynamic model of the production system is required. This work presents a new simplified model, which may be applied to risers with S-shaped geometry. Results obtained with the new proposed model show a good agreement with a high-fidelity reference model developed in LedaFlow#x2122;.

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