We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Synergism and Performance for Systems Containing Binary Mixtures of Anionic/Cationic Surfactants for Enhanced Oil Recovery.
- Authors
Li, Yingcheng; Puerto, Maura; Bao, Xinning; Zhang, Weidong; Jin, Jun; Su, Zhiqing; Shen, Shaochun; Hirasaki, George; Miller, Clarence
- Abstract
The surfactant structure-performance relationship and application properties in enhanced oil recovery (EOR) for binary mixtures of anionic and cationic surfactants are presented and discussed. A polyoxyethylene ether carboxylate anionic surfactant was blended with a quaternary ammonium chloride cationic surfactant and tested for a high-temperature, low-salinity, and high-hardness condition as found in an oil reservoir. These mixtures were tailored by phase behavior tests to form optimal microemulsions with normal octane (n-C8) and crude oil having an API gravity of 48.05°. The ethoxy number of the polyoxyethylene carboxylate anionic surfactant and the chain length of the cationic surfactant were tuned to find an optimal surfactant blend. Interfacial tensions with n-C8 and with crude oil were measured. Synergism between anionic and cationic surfactants was indicated by surface tension measurement, CMC determination, calculation of surface excess concentrations and area per molecule of individual surfactants and their mixtures. Molecular interactions of anionic and cationic surfactants in mixed monolayers and aggregates were calculated by using regular solution theory to find molecular interaction parameters β and β . Morphologies of surfactant solutions were studied by cryogenic TEM. The use of binary mixtures of anionic/cationic surfactants significantly broadens the scope of application for conventional chemical EOR methods.
- Subjects
DRUG synergism; BINARY mixtures; ANIONIC surfactants; CATIONIC surfactants; THERMAL oil recovery; MICROEMULSIONS
- Publication
Journal of Surfactants & Detergents, 2017, Vol 20, Issue 1, p21
- ISSN
1097-3958
- Publication type
Article
- DOI
10.1007/s11743-016-1892-x