Severe slugging (SS) is an undesired multiphase phenomenon which occurs in riser-pipeline systems during the transportation of well fluids. It causes unfavourable instability in the fluid flow to the downstream separation facilities, resulting in detrimental effects to the separation/compressor trains; and in extreme cases can cause the shutdown of weak wells due to imposed additional backpressure.

This work looks at a novel approach of using a compact separator, I-SEPTM, to mitigate SS in a passive manner. I-SEPTM has been shown to have a significant effect on stabilising the flow and has been compared to existing mitigation techniques showing a production benefit in a certain SS flow range.

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