Investigation on surfactant desorption isotherm to enhance oil spontaneous recovery in a low permeability core

Ichhuy Ngo, Ronald Nguele, Yuichi Sugai, Kyuro Sasaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Surfactant enhanced oil recovery depends on the interfacial tension (IFT) reduction and wettability alteration in the rock/oil/brine system. An adequate amount of surfactant within the system is vital during the application. The aforementioned problem becomes more sensitive in a low permeability formation when the adsorption is much higher than the desorption. This study, therefore, investigated the surfactant desorption isotherm using sodium dodecylbenzene sulfonate (SDBS) as a surfactant and tight Berea sandstone as adsorbent. The desorption of SDBS was found to follow a Langmuir type isotherm. Owing to the Langmuir characteristics, the desorption increased up to four folds by reducing the salinity of the process water from 3 wt.% to 1 wt.%. The study was extended in a spontaneous imbibition tests for oil recovery. The desorbed SDBS enables an increase in total oil recovery by 2%. The results were subsequent to a more favourable IFT and a mitigation in the narrow-pore blockage.

Original languageEnglish
Pages (from-to)421-441
Number of pages21
JournalInternational Journal of Oil, Gas and Coal Technology
Volume28
Issue number4
DOIs
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Energy(all)

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