Dynamic Interfacial Tensions of Surfactant and Polymer Solutions Related to High-Temperature and High-Salinity Reservoir
Xiang-Long Cui,
Yi Pan,
Fu-Tang Hu,
Lu Han,
Xiu-Yu Zhu,
Lei Zhang,
Zhao-Hui Zhou,
Gen Li,
Gui-Yang Ma,
Lu Zhang
Affiliations
Xiang-Long Cui
College of Petroleum Engineering, Liaoning Petrochemical University, Fushun 113001, China
Yi Pan
College of Petroleum Engineering, Liaoning Petrochemical University, Fushun 113001, China
Fu-Tang Hu
Research Institute of Drilling and Production Technology, PetroChina Qinghai Oilfield Company, Dunhuang 736202, China
Lu Han
State Key Laboratory of Enhanced Oil Recovery (PetroChina Research Institute of Petroleum Exploration & Development), Beijing 100083, China
Xiu-Yu Zhu
Research Institute of Drilling and Production Technology, PetroChina Qinghai Oilfield Company, Dunhuang 736202, China
Lei Zhang
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Zhao-Hui Zhou
State Key Laboratory of Enhanced Oil Recovery (PetroChina Research Institute of Petroleum Exploration & Development), Beijing 100083, China
Gen Li
Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China
Gui-Yang Ma
College of Petroleum Engineering, Liaoning Petrochemical University, Fushun 113001, China
Lu Zhang
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Betaine is a new surfactant with good application prospects in high-temperature and high-salinity reservoirs. The interfacial properties of two kinds of betaine mixtures with a good synergistic effect were evaluated in this paper. On this basis, the effects of temperature-resistant, salt-resistant polymers with different contents of 2-acrylamide-2-methylpropanesulfonic acid (AMPS) on dynamic interfacial tensions (IFTs) against n-alkanes and crude oil were studied. The experimental results show that the IFTs between betaine ASB and n-alkanes can be reduced to ultra-low values by compounding with anionic surfactant petroleum sulfonate (PS) and extended anionic surfactant alkoxyethylene carboxylate (AEC), respectively. ASB@AEC is very oil-soluble with nmin value ≥14, and ASB@PS is relatively water-soluble with nmin value of 10. The water solubility of both ASB@PS and ASB@AEC is enhanced by the addition of water-soluble polymers. The HLB of the ASB@AEC solution becomes better against crude oil after the addition of polymers, and the IFT decreases to an ultra-low value as a result. On the contrary, the antagonistic effect in reducing the IFT can be observed for ASB@PS in the same case. In a word, polymers affect the IFTs of surfactant solutions by regulating the HLB.
