Study on the Relationship between Emulsion Stability and Droplet Dynamics of a Spontaneous Emulsion for Chemical Enhanced Oil Recovery
Abstract
Spontaneous emulsion (SE) has attracted increasing attention, especially in the development of low-permeability reservoirs (with an average throat radius of 0.1-2 µm) for enhanced oil recovery. In this work, based on multiple light scattering principles, the relationship between emulsion stability and the droplet dynamics of SEs was investigated. The results showed that the synergistic effect of surfactant and polymer was crucial for oil emulsification in brine, since the stability of the emulsion was greatly improved. The emulsion stability and droplet dynamics depend on the temperature, concentration, and type of emulsifier. The optimal combination system had the lowest Turbiscan stability index value, and the emulsion stability time was more than 2000s. The average droplet size was 1.50 µm, and the droplet migration rate was 7.21 mm/h. The stability of the emulsion was resulted from the microscopic droplet dynamics. By reducing the migration rate of the droplets, stability of the emulsion can be obtained. Finally, the stability and droplet dynamics mechanism of the system were explained by using a schematic representation of the various equilibriums in the spontaneous emulsification flooding system.
Recommended Citation
H. Feng et al., "Study on the Relationship between Emulsion Stability and Droplet Dynamics of a Spontaneous Emulsion for Chemical Enhanced Oil Recovery," Journal of Dispersion Science and Technology, vol. 39, no. 8, pp. 1214 - 1222, Taylor & Francis, Aug 2018.
The definitive version is available at https://doi.org/10.1080/01932691.2017.1391699
Department(s)
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Droplet dynamics; low-permeability reservoirs; multiple light scattering; spontaneous emulsion; stability
International Standard Serial Number (ISSN)
0193-2691; 1532-2351
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2018 Taylor & Francis, All rights reserved.
Publication Date
01 Aug 2018
Comments
This work is financially supported by the National Science and Technology Major Project (2017ZX05009-004), the Science Foundation of China University of Petroleum, Beijing (No. 2462015YJRC033), the National Natural Science Foundation of China (No. 51774309), and Science Foundation of China University of Petroleum-Beijing at Karamay (No. RCY2017A-01-001).