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Experimental investigation of the influence of salinity gradient on low-concentration surfactant flooding in Berea sandstone

  • Received : 2018.06.04
  • Accepted : 2018.08.20
  • Published : 2018.12.25

Abstract

There are serious issues with the application of surfactant flooding as a third recovery method, such as surfactant slug losses. In this study,the impact of the salinity gradient on the remobilization of oiltrapped in Berea sandstone was investigated by emphasizing the surfactant adsorption gradient and phase behavior to determine the optimal salinity of the chosen surfactant concentration for investigating the salinity gradient. Three salinity-gradient schemes were applied to six cores saturated with light and heavy oils. The positive salinity gradient provided the best recovery results with an in situ microemulsion formation that could be observed in the fluid collector.

Keywords

Acknowledgement

Supported by : Ministry of Trade, Industry, and Energy (MOTIE)

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