| Summary: | Natural surfactants have been considered part of the EOR processes, given their non-toxic and environment-friendly nature. In this project, two novel natural surfactants have been extracted. Furthermore, the physical-chemical properties of novel saponins, foamability and foam stability, interfacial tension (IFT), and wettability between saponins and low salinity water (LSW) and nanoparticles have been investigated. On the other hand, the interactions of the particles (mechanisms) between saponins, salt, nanoparticles, crude oil, and formation rocks have been examined.
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