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Highlights:
1-hexyl-3-methylimidazolium triflate (IL6) significantly increased surface activity.
New ionic liquid-based hydrogel (CBHIL) was developed for use in EOR.
New formulation shifts carbonate surfaces’ wettability from oil-wet to water-wet.
CBHIL-C6 injection in layered micromodel boosts oil recovery by 79.8%.
Synergistic ionic liquid effects in CBH create eco-friendly, efficient composition.
Abstract:
This research focuses on the combined effectiveness of imidazolium-based ionic liquids (ILs) with triflate anion and carboxymethylcellulose-based hydrogels (CBHs) for environmentally friendly oil recovery. Its porous structure and significant equilibrium swelling of up to 1550 % under harsh reservoir conditions were observed. The combination of these two substances led to a maximum recovery of 79.85 % of the original oil in place, a significantly superior outcome compared to separate injection of the substances. Thus, these new compounds demonstrate promising potential for EOR applications in challenging reservoir conditions.
