dc.contributor.advisor Standnes, Dag Chun dc.contributor.author Jørgensen, Kevin dc.date.accessioned 2017-10-26T13:00:16Z dc.date.available 2017-10-26T13:00:16Z dc.date.issued 2017-06-14 dc.identifier.uri http://hdl.handle.net/11250/2462398 dc.description Master's thesis in Petroleum engineering nb_NO dc.description.abstract It is believed that most reservoirs have at least some degree of fractures and spontaneous imbibition is considered to be one of the most important recovery processes in fractured reservoirs. The imbibiton process can be described by a diffusion equation that combines Darcy's law and mass balance, which leads to an expression with a diffusion coefficient $D(S_w)$ that is dependant on water saturation. This diffusion coefficient make up a large part of the variables in the counter current imbibition process. nb_NO The diffusion equation is difficult to solve due to it being a non-linear equation and it is therefore of interest to see if it can be changed to a linear diffusion equation by assuming a constant D. Simulations are done using the eclipse 100 simulator to try to replicate previously performed experiments on core plugs. These simulations are then used to explore the effect of the diffusion coefficient on oil recovery. As the diffusion coefficient is dependant on water it makes the imbibition formula difficult to solve and it is of interest to see how the oil recovery is dependant on the coefficient shape at different water saturations. Simulation results show that for the diffusion coefficient shape and total area both affect the oil recovery rate and total oil recovery in a given time period. dc.language.iso eng nb_NO dc.publisher University of Stavanger, Norway nb_NO dc.relation.ispartofseries Masteroppgave/UIS-TN-IPT/2017; dc.subject petroleumsteknologi nb_NO dc.subject petroleum engineering nb_NO dc.subject counter current flow nb_NO dc.subject Eclipse 100 nb_NO dc.subject reservoarteknologi nb_NO dc.subject spontaneous imbibition nb_NO dc.subject non linear diffusion nb_NO dc.subject core plug nb_NO dc.title A study of the diffusion coefficient term in counter current imbibition and its effect on production nb_NO dc.type Master thesis nb_NO dc.subject.nsi VDP::Technology: 500::Rock and petroleum disciplines: 510::Petroleum engineering: 512 nb_NO
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