1. Study of a Novel Carboxylic Cellulose Nanofibrils-Ethoxylated Phytosterol-Alcohol Environmentally Friendly System on the Application in Enhanced Oil Recovery.
- Author
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Jie Yuan, Dexin Liu, Jiankang Li, Jie Cui, Hongtao Tang, Xin Wei, Juan He, Xuehao Zhang, Pan Huang, and Han Jia
- Subjects
ENHANCED oil recovery ,TERNARY system ,BIOSURFACTANTS ,PHYTOSTEROLS - Abstract
Bio-polymers and bio-surfactants have attracted increasing attention for their application in chemical enhanced oil recovery (EOR) due to the environmental concerns of synthetic chemical agents. Here, a ternary compound system consisted of carboxylic cellulose nanofibrils (CCNF), ethoxylated phytosterol (BPS), and n-pentanol was constructed. The rheological property and interfacial activity of the compound system and the effects of each component at high temperature (80 °C) was investigated systematically. The ternary compound system exhibited excellent performance in thickening, IFT reduction (<10
-2 mN m-1 ), emulsification, and better salt tolerance. CBP, the ternary system of CCNF (2000 mg L-1 ), BPS (2000 mg L-1 ), and n-pentanol (5000 mg L-1 ), greatly enhanced the oil recovery (24.3%) in the core flooding tests by its high displacement efficiency and sweep enlargement, which was demonstrated directly in the visual micromodel flooding. As an eco-friendly system with remarkable performance, the compound system of CBP shows great application potential in EOR. [ABSTRACT FROM AUTHOR]- Published
- 2021
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