A formulation based on a cationic surface-active ionic liquid and an anionic surfactant for enhanced oil recovery at a carbonate reservoir

With the still huge dependence on crude oil, it is crucial to develop enhanced oil recovery techniques improve reservoir production and lifespan. Carbonate reservoirs constitute over half world's reserves, but they are challenging in terms of due their complex pore network, oil-wet or mixed-wet rocks, harsh conditions temperature salinity. This work offers a significant contribution exploitation these reservoirs. A new formulation, able provide very low interfacial tension at high temperatures with reduced adsorption carbonate was designed. low-cost traditional alkyl benzene sulfonate (RECOLAS158) mixed cationic surface active ionic liquid N,N-diethoxylated-N-tallow-N-ethylammonium ethylsulfate. formulation containing 56.4 wt% RECOLAS158 selected for its good performance phase behavior, injectability wide range salinities. tertiary (19.53% original place) blend (0.086 mgblend/grock), demonstrated promising formulation. The key mechanism associated improvement reduction.