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Journal of Surfactants and Detergents

, Volume 20, Issue 5, pp 1095–1104 | Cite as

Experimental Study of Nanofluids Applied in EOR Processes

  • Tereza Neuma de Castro DantasEmail author
  • Tamyris Thaise Costa de Souza
  • Afonso Avelino Dantas Neto
  • Maria Carlenise Paiva de Alencar Moura
  • Eduardo Lins de Barros Neto
Original Article

Abstract

Nanoemulsions are small droplet-sized systems that have low surface tension and a small percentage of active material in their composition. In this study, low oil content nanoemulsion systems were developed for the use in enhanced oil recovery (EOR). The experiments were performed on a device capable of simulating petroleum reservoir conditions using sandstone rock cores. Nanoemulsions were obtained from a pre-selected microemulsion system composed of: RNX95 as surfactant, isopropyl alcohol as cosurfactant, kerosene as oil phase, and distilled water as aqueous phase. Different percentages of polyacrylamide were added to the systems obtained to evaluate the influence of viscosity in EOR results. The nanoemulsion droplet sizes ranged from 9.22 to 14.8 nm. Surface tension values were in the range of 33.6–39.7  dyn/cm. A nanoemulsion system with 2.5 wt% surfactant was used in EOR assays. The oil recovery was directly proportional to polymer percentage in the nanoemulsion, ranging from 39.6 to 76.8%. The total oil in the place recovery ranged from 74.5 to 90%.

Keywords

Surfactant applications Non-ionic surfactants Interfacial science Surface activity 

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Copyright information

© AOCS 2017

Authors and Affiliations

  • Tereza Neuma de Castro Dantas
    • 1
    Email author
  • Tamyris Thaise Costa de Souza
    • 1
  • Afonso Avelino Dantas Neto
    • 1
  • Maria Carlenise Paiva de Alencar Moura
    • 1
    • 2
  • Eduardo Lins de Barros Neto
    • 1
  1. 1.Department of Chemical EngineeringFederal University of Rio Grande do NorteNatalBrazil
  2. 2.Post-Graduate Program in Petroleum and Gas EngineeringPotiguar UniversityNatalBrazil

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