EXTRACTION METHODS AND SYSTEMS FOR RECOVERY OF OIL FROM RESERVOIRS CONTAINING MOBILE WATER

The present disclosure relates to, according to some embodiments, an extraction process for recovering an oil from an oil reservoir comprising a mobile water. The extraction process includes the step of injecting a first solvent into the oil reservoir through the at least one injection well to form a first mixture, the first mixture comprising the first solvent, a first portion of mobile water, and a first portion of oil, Additionally, the extraction process includes the steps of recovering the first mixture from the at least one production well to produce a first recovered oil mixture, the first recovered oil mixture comprising the first solvent, the first portion of the mobile water, and the first portion of oil; separating the first recovered oil mixture to produce a first recovered oil fraction that is separated from the first portion of mobile water and the first solvent; and injecting a second solvent into the oil reservoir through the at least one injection well to form a second mixture, the second mixture comprising the second solvent, a second portion of mobile water, and a second portion of oil. The extraction process also includes the steps of recovering the second mixture from the at least one production well to produce a second recovered oil mixture, the second recovered oil mixture comprising the second solvent, the second portion of the mobile water, and the second portion of oil, and separating the second recovered oil mixture to produce a second recovered oil fraction that is separated from the second portion of mobile water and the second solvent. La présente invention concerne, selon certains modes de réalisation, un procédé d'extraction pour récupérer du pétrole à partir d'un réservoir pétrolifère comprenant de l'eau libre. Le procédé d'extraction comprend l'étape consistant à injecter un premier solvant dans le réservoir pétrolifère par l'intermédiaire du ou des puits d'injection pour former un premier mélange, le premier mélange comprenant le premier solvant, une première partie d'eau libre et une première partie de pétrole. Le procédé d'extraction comprend en outre les étapes consistant à : récupérer le premier mélange à partir du ou des puits de production pour produire un premier mélange de pétrole récupéré, le premier mélange de pétrole récupéré comprenant le premier solvant, la première partie d'eau libre et la première partie de pétrole ; séparer le premier mélange de pétrole récupéré pour produire une première fraction de pétro