Exploratory study on the whole process of profile control and flooding with nano polymer microspheres
In order to study the deep profile control and flooding mechanism of nano poly-mer microspheres,the application effect on production site and the impact on the later crude oil demulsification and dehydration,optical microscope and scanning electron microscope were used to observe the particle size change of nano polymer microspheres,analyze the in-ternal reasons,and use thermal sedimentation chemical method and other means to study whether the microsphere lotion has an impact on the crude oil demulsification and dehydra-tion.At the same time,combined with production field test application effect,we conducted a comprehensive exploration and research on the whole process of nano polymer microsphere flooding.The results show that small particle size microspheres are more likely to enter the deep part of the oil reservoir for retention,and the microspheres themselves expand and be-come larger for sealing,increasing the specific surface area of the oil reservoir,and reducing the permeability of the oil reservoir.The adaptability of small particle size polymer micro-spheres for oil reservoir control and displacement is more advantageous,and the on-site ap-plication effect is obvious,effectively alleviating the contradiction of rising water content and achieving good water control effect.Laboratory experiments have proved that the microsphere lotion in the produced liquid has little effect on crude oil demulsification and dehydration,and even has a certain positive effect.
nano polymer microspheresdeep profile control and floodingmechanism studyapplication effectdemulsification and dehydration
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