dc.contributor.advisor | Foss, Bjarne Anton | nb_NO |
dc.contributor.advisor | Sagatun, Svein Ivar | nb_NO |
dc.contributor.advisor | Hasan, Agus | nb_NO |
dc.contributor.author | Ronen, Jonathan | nb_NO |
dc.date.accessioned | 2014-12-19T14:03:18Z | |
dc.date.available | 2014-12-19T14:03:18Z | |
dc.date.created | 2010-11-24 | nb_NO |
dc.date.issued | 2010 | nb_NO |
dc.identifier | 372103 | nb_NO |
dc.identifier | ntnudaim:5754 | nb_NO |
dc.identifier.uri | http://hdl.handle.net/11250/260248 | |
dc.description.abstract | This thesis was set to tackle the gas coning problem in oil-rim reservoirs with horizontal wells. The focus was short term production planning in the sub-critical phase only. Different controllers were developed and assessed based on the objective of net-present-value (NPV) of oil produced in the sub-critical phase. The reservoir model is a 1-D partial differential equation describing the dynamics of the gas-oil contact (GOC), for a homogeneous reservoir. Gas coning is considered to be the deformation of the GOC towards the well. Several controllers were developed and assessed alongside control laws from previous research: (i) the Backstepping method was used to develop a state-feedback controller, along with an observer. Coupled they make the Backstepping output-feedback controller. (ii) an output-feedback controller based on the structure proposed by previous research. (iii) linear-quadratic optimal control. An extended Kalman filter was also considered as a state observer, alongside the Backstepping observer. The backstepping controller did not deliver an increase of sub-critical payout which warrants the complicated structure of an observer-controller pair. It was even outperformed by simpler, output-feedback control laws. The optimal linear-quadratic controller achieved the best NPV of sub-critical production by far. This makes it the most attractive control strategy presented, even when considering that a real-world implementation will need to be paired with a state observer. | nb_NO |
dc.language | eng | nb_NO |
dc.publisher | Institutt for teknisk kybernetikk | nb_NO |
dc.subject | ntnudaim:5754 | no_NO |
dc.subject | SIE3 teknisk kybernetikk | no_NO |
dc.subject | Reguleringsteknikk | no_NO |
dc.title | Boundary Control of the Gas Coning Problem | nb_NO |
dc.type | Master thesis | nb_NO |
dc.source.pagenumber | 77 | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for teknisk kybernetikk | nb_NO |