Show simple item record

dc.contributor.authorSharma, Roshan
dc.contributor.authorGlemmestad, Bjørn
dc.date.accessioned2013-12-19T08:44:21Z
dc.date.accessioned2013-12-19T12:05:15Z
dc.date.accessioned2017-04-19T12:49:42Z
dc.date.available2013-12-19T08:44:21Z
dc.date.available2013-12-19T12:05:15Z
dc.date.available2017-04-19T12:49:42Z
dc.date.issued2013
dc.identifier.citationSharma, R. & Glemmestad, B. Optimal control strategies with nonlinear optimization for an Electric Submersible Pump lifted oil field. Modeling, Identification and Control 2013;34(2):55-67
dc.identifier.issn0332-7353
dc.identifier.urihttp://hdl.handle.net/11250/2438392
dc.description.abstractIn an Electric Submersible Pump (ESP) lifted oil field, the ESP of each oil well should be operated inside its operating window. The total power consumed by the ESPs in the oil field should be minimized. The speed of the ESPs and the production choke valve opening should be optimally chosen for maximizing the total oil produced from the oil field. At the same time, the capacity of the separator should not be exceeded. In this paper, nonlinear steady state optimization based on Sequential Quadratic Programming (SQP) is developed. Two optimal control structures are proposed in this paper. In the first case, the optimal pump speed is controlled by a PI controller by varying the electrical excitation signal to the motors. The optimal fluid flow rate through each oil well is controlled by another PI controller by varying the production choke valve opening. The paper shows that the production choke valve for each oil well has to be always 100% open to maintain the optimal fluid flow rate. In the second case, the production choke valves are considered to be always 100% open as hard constraints. The optimal fluid flow rate through each oil well is controlled by a PI controller by varying the pump speed. It is shown that when the optimal fluid flow rate is tracked by the controller, the speed of each of the pumps is equal to the optimal pump speed calculated by the optimizer. This basically means that we can achieve the optimization objective with the same optimal results as in the first case by using only a single PI controller. The limitations of these two optimal control structures for very low values and for very high values of the separator capacity are discussed. For the feasible range of separator capacities, the optimal locus of the fluid flow rate and the pump speed are shown in this paper.
dc.language.isoeng
dc.publisherNorwegian Society of Automatic Control
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.subjectElectric Submersible Pump
dc.subjectnonlinear optimization
dc.subjectoptimal control
dc.subjectoil production
dc.titleOptimal control strategies with nonlinear optimization for an Electric Submersible Pump lifted oil field
dc.typeJournal article
dc.typePeer reviewed
dc.date.updated2013-12-19T08:44:21Z
dc.description.versionPublished version
dc.rights.holder© 2013 Norwegian Society of Automatic Control
dc.subject.nsi553
dc.identifier.doihttp://dx.doi.org/10.4173/mic.2013.2.2
dc.identifier.cristin1055314


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

http://creativecommons.org/licenses/by/3.0/
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/3.0/