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8337272 
Meetings & Symposia 
Optimum salinity condition of surfactant solutions associated with low Salinity water technology - A new insight into chemical enhanced oil recovery (CEOR) 
Bigdeli, AR; Mavaddat, M; Riahi, S 
2017 
European Association of Geoscientists and Engineers, EAGE 
79th EAGE Conference and Exhibition 2017: Energy, Technology, Sustainability - Time to Open a New Chapter 
English 
Salinity is an important controlling factor in most of the chemical enhance oil recovery (CEOR) processes. Finding an optimum condition for the surfactant in emulsion flooding is of the most important concerns in maximizing CEOR efficiency. In this study, diluted forms of two different crude oils, an anionic surfactant (Aerosel-OT), and reformulated actual sea water were examined as a system for salinity scan to find the optimum condition of each oil. The crude oils were diluted by normal hexane and the synthesized sea water was diluted by de-ionized water respectively. All the experiments were executed at room condition (25°C and 1 and atmospheric pressure). Results show that by choosing an appropriate salinity for the surfactant/oil water system, we can activate both mechanisms of low salinity water technology and microemulsion flooding which can be used in our future chemical core flooding experiments. To our knowledge, this is the first time that a low salinity condition is introduced as the optimum salinity condition of surfactant solution at the same time.