Subsea Gas Lift in Deepwater Applications

摘要

Riser-base gas lift is used in subsea developments for production enhancement.It is an effective method to suppress severe slugging that occurs in flowlines with downhill inclination.In some cases,gas lift can aid blow-down for hydrate prevention.Gas lift is not always needed because its effectiveness depends on reservoir performance,fluid properties,seabed terrain,subsea architecture,and flowline and riser specifications.The need for gas lift,optimal operability,and system design should be assessed from various aspects,including flow assurance.A generic set of guidelines was developed on the basis of past experience with riser gas lift applications for different deepwater subsea projects and associated multiphase-flow phenomena.