Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 72, Issue -, Pages 414-422Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2018.12.044
Keywords
Shale Oil; Spontaneous imbibition; Surfactant; NMR
Funding
- Fundamental Research Funds for the Central Universities of China
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Surfactant enhanced spontaneous imbibition is an effective method to enhance oil recovery in shale reservoirs, however the mechanism is still unclear. This work attempts to investigate the effect of added surfactants on the spontaneous imbibition into shale rocks using NMR tests. Contact angles and IFT are measured to evaluate the efficiency of different surfactants in terms of wettability alteration and IFT reduction. According to the experimental results, the studied anionic surfactants perform better on the wettability alteration of shale rocks than studied nonionic surfactants, and the key factor to enhance the shale oil recovery may be wettability alteration. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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