Soto Campos, Ana MaríaRodríguez Escontrela, Iria2018-02-202018-02-202017http://hdl.handle.net/10347/16499Chemical flooding with surfactants is well known to have huge potential in Enhanced Oil Recovery (EOR) processes. One of the main challenges for surfactant EOR is finding a surfactant or a surfactant blend able to generate a Winsor Type III microemulsion. The main objective of this thesis is to obtain optimal formulations with surface active ionic liquids (SAILs) able to improve current surfactant EOR methods. To achieve this goal, the phase behaviour of a set of SAILs or blends containing a SAIL has been studied in the presence of water or brine and oil at different temperatures and atmospheric pressure. Based on the results obtained, a formulation containing a blend of IOS15-18 and [C12mim]Br is suggested as the best option, since an ultra-low interfacial tension was achieved and an injectable optimal formulation, tolerant to divalent ions, was found at a particular salinity.engEsta obra atópase baixo unha licenza internacional Creative Commons BY-NC-ND 4.0. Calquera forma de reprodución, distribución, comunicación pública ou transformación desta obra non incluída na licenza Creative Commons BY-NC-ND 4.0 só pode ser realizada coa autorización expresa dos titulares, salvo excepción prevista pola lei. Pode acceder Vde. ao texto completo da licenza nesta ligazón: https://creativecommons.org/licenses/by-nc-nd/4.0/deed.glhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.glSurface active ionic liquidsInterfacial tensionEnhanced Oil RecoveryPhase behaviourMaterias::Investigación::22 Física::2213 Termodinámica::221309 Equilibrios termodinámicoMaterias::Investigación::33 Ciencias tecnológicas::3303 ingeniería y tecnología químicas::330390 Tensioactivosdoctoral thesisopen access