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The key to a successful EOR formulation is to carefully select the components that provide ultra-low interfacial tension (IFT) under reservoir conditions. Achieving ultra-low IFT greatly reduces capillary forces that trap oil.

Important Technologies in Chemical EOR

Alkylation: Production of C14 – C30 alkylaryl compounds for use as hydrophobes that interact favorably with crude oil. When sulfonated, these long chain alkylaryl compounds are used as primary surfactants.

Alkoxylation: Reaction of propylene oxide (PO) and ethylene oxide (EO) with active alcohols to produce nonionic surfactants and intermediates for further reaction.

Sulfation / Sulfonation/ Carboxylation: Addition of an anionic group to a molecule to improve water solubility/temperature stability of the molecule