期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 476, 期 -, 页码 17-23出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2015.03.023
关键词
Surfactant; Chemical enhanced oil recovery; Reservoir; Interfacial tension; Stability
资金
- Saudi Aramco [CPM 2297]
- Center of Petroleum and Minerals, King Fahd University of Petroleum Minerals
- Saudi Aramco
Surfactants are used in chemical enhanced oil recovery (cEOR) to increase the capillary number by decreasing the oil/water interfacial tension (IFT). In this work, carboxybetaine based amphoteric and propoxylated anionic surfactants were evaluated for application in cEOR. Thermal stability of the surfactants was assessed using a novel approach based on FTIR, NMR and TGA analyses. The anionic surfactant showed lower initial IFT compared to the amphoteric surfactant. After aging at 90 degrees C for a period of 10-days, the amphoteric surfactant maintained its IFT, while almost two orders of magnitude increase in the IFT of the anionic surfactant was observed. TGA analysis showed that the two surfactants were thermally stable for short exposure times. For long term stability, both FTIR and NMR analyses showed structural changes in the aliphatic region after aging in the anionic surfactant. The thermally stable amphoteric surfactant was further evaluated at different concentrations, temperatures and salinity. By increasing the surfactant concentration, IFT decreased initially and then increased with the increase in surfactant concentration. The oil/water IFT decreased by adding salts and increased with the increase in temperature. The results of NMR, FTIR and TGA techniques showed good correlation with IFT measurements and showed the potential of using these techniques in screening surfactant. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据