Singing mitigation in an export riser via liquid injection: a field case study
conference paper
Flexible Risers are prone to the generation of high amplitude tonal noise, i.e. a so-called singing riser. Recently, severe vibrations and high noise levels were encountered on the turret of an FPSO in the Norwegian Sea, resulting in significantly reduced production. The vibrations could be attributed to pulsations generated either by a flexible jumper (connecting topside to turret), the gas lift riser or the gas export riser. Field measurements showed that the most likely source was the 10 inch gas export riser. Due to the vibrations, a reduced production limit was set. A field measurement campaign was started to inject liquid into the export risers to provisionally increase production, while in the meantime permanent solutions were evaluated and installed.
Topics
TNO Identifier
511684
Publisher
ASME
Article nr.
PVP2014-28533
Source title
Proceedings of the ASME 2014 Pressure Vessels & Piping Conference PVP2014, 20-24 July, 2014, Anaheim, California, USA
Collation
9 p.
Files
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