Investigation of the use of EOR methods in a given reservoirInvestigation of the use of EOR methods in a given reservoir Μεταπτυχιακή Διατριβή Master Thesis 2017-02-062017enIt is widely accepted among the petroleum engineering community that Enhanced Oil Recovery (EOR) is currently one of the most active sectors of research in the oil industry. The first part of the present diploma thesis consists of a literature review where the commercially feasible Enhanced Oil Recovery methods are described. The oil recovery mechanisms each EOR method involves, the advantages, the disadvantages and some examples of successful field applications are presented. At the end of the literature review, the reader will have a good perception of the necessity of EOR implementation in the existing oil fields, the production potential of the EOR techniques and the ability to identify where and at which extent each EOR method can be applied. The second part of the present diploma thesis investigates the implementation of Chemical EOR methods in the H1 segment of the offshore oil field named Gullfaks that is found in the Norwegian side of the North Sea. At first, a presentation of the reservoir properties is made and then a simulation study of the reservoir is conducted using ECLIPSE - 100 (2010 version) software.http://creativecommons.org/licenses/by/4.0/Πολυτεχνείο Κρήτης::Σχολή Μηχανικών Ορυκτών ΠόρωνFlitris_Evangelos_MSc_2017.pdfChania [Greece]Library of TUC2017-02-06application/pdf8 MBfree Flitris Evangelos Φλιτρης Ευαγγελος Chatzichristos, Christos Gaganis Vasileios Γαγανης Βασιλειος Kalogerakis Nikos Καλογερακης Νικος Πολυτεχνείο Κρήτης Technical University of Crete Enhanced oil recovery methods