Application and Prospect of Choline-based Deep Eutectic Solvent in EOR and CCUS
Deep Eutectic Solvent(DES)has the advantages of low saturated vapor pressure,non-flammability,non-explosion,non-toxicity,easy degradation,good electrochemical and thermal stability,etc.DES has a good surface activity,and the hy-drogen bond network in DES has a good synergistic oil displacement effect with anionic/cationic surfactants.The researches on synergistic effect of DES and common surfactants is still in the initial stage,and the mechanism of Enhanced Oil Recovery(EOR)of their compound system is still unclear.On the basis of comprehensive analysis and summary of the physical and chemical properties of choline-based DES,this paper explores the EOR mechanism of DES and its mixed system with anion-ic/cationic surfactants,reveals the mechanism of carbon dioxide absorption by DES,and puts forward some suggestions on the application of DES in EOR and carbon capture,utilisation and storage(CCUS)of heavy oil reservoirs,low permeability reservoirs.The research results are of significance in guiding the popularization and application of DES in EOR and CCUS.
choline chloride deep eutectic solventchemical floodinghydrogen bondEORCCUS
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