dc.contributor.advisor | Hovd, Morten | nb_NO |
dc.contributor.advisor | Skogestad, Sigurd | nb_NO |
dc.contributor.advisor | Jahanshahi, Esmaeil | nb_NO |
dc.contributor.author | Lieungh, Mats | nb_NO |
dc.date.accessioned | 2014-12-19T14:05:55Z | |
dc.date.available | 2014-12-19T14:05:55Z | |
dc.date.created | 2012-11-08 | nb_NO |
dc.date.issued | 2012 | nb_NO |
dc.identifier | 566010 | nb_NO |
dc.identifier | ntnudaim:7131 | nb_NO |
dc.identifier.uri | http://hdl.handle.net/11250/260661 | |
dc.description.abstract | This thesis study the possibility of riser slugging control in oshore oil productionusing a subsea choke valve. A 5-state simplied model of a well-pipelinerisersystem is introduced and tted to a reference model in the ow simulatorOLGA. The models have two inputs, a subsea valve at the wellhead and a topsidevalve at the top of the riser. The eect the valves have on the behavior ofthe simplied model are tted to simulation data from the OLGA-model usingbifurcation diagrams.An input-output controllability analysis of the simplied model show thatanti-slug control using a subsea valve at the wellhead is more dicult than theconventional solution, which is to use the topside choke valve. This is conrmedby simulations on the simplied model using Hinfinity-controllers.Stabilizing control of the OLGA-model using the subsea valve was unsuccessful,despite testing dierent measurement combinations and control structures.A more promising solution for controlling riser slugging using a subsea valve istested in OLGA, where a subsea valve located near the base of the riser can keepthe system stable at riser slugging conditions. This is also seen in an experimenton a small scale ow lab. | nb_NO |
dc.language | eng | nb_NO |
dc.publisher | Institutt for teknisk kybernetikk | nb_NO |
dc.subject | ntnudaim:7131 | no_NO |
dc.subject | MTTK teknisk kybernetikk | no_NO |
dc.subject | Ny energi, olje og gass | no_NO |
dc.title | Stabilizing Slug Control Using Subsea Choke Valve | nb_NO |
dc.type | Master thesis | nb_NO |
dc.source.pagenumber | 76 | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for teknisk kybernetikk | nb_NO |