flow assurance in pipeline-riser system using olga software

In this study, the flow assurance of production liquid rate is analyzed, using olga software for pipeline-riser of an offshore platform. by applying different methods such as installing a gas lift valve at the pipe-riser or set a choke valve at the top side of the riser, on the pipeline connected to the separator at the platform. the model in olga is designed to be 7.5 km long, a 200 m riser, and 70 m a pipe connected to the separator. using pvtsim software, calculate the fluid properties and export a pvtsim-file of the fluid for olga software. the results have shown that using a gas lift valve at 7 or 14 kg/s mass flow rate got the best total liquid volume rate in comparison to other methods. the increment in total liquid rate by using this method is 1100 m3/day.