生物表面活性剂及其复配体系在三次采油中的应用OACSTPCD

Surfactants are widely used in oil recovery industry due to their excellent oil displacement effect.However,their applications are usually accompanied with the following two shortcomings;high cost due to the significant loss of surfactant by degradation and adsorption;partial loss of activity under high temperature and high salt conditions.Compared with non-degradable chemical surfactants,biosurfactants have several advantages for their use in tertiary oil recovery,including their low toxicity or non-toxicity,biodegradability,excellent surface activity,good environmental compatibility and stability.In this review,we first described the classification of biosurfactants and the properties of several commonly used biosurfactants.Then,we focused on their applications intertiary oil recovery,with detailed summary of the research progress on single biosurfactant,multiple biosurfactants,biosurfactant and chemical surfactant compounding,biosurfactant and nanomaterial compounding flooding.Finally,we provided the outlook for the development trend of biosurfactants in tertiary oil recovery.