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Surface Dilational Rheology, Foam, and Core Flow Properties of Alpha Olefin Sulfonate
Author(s) -
Liu Hongsheng,
Han Peihui,
Sun Gang,
Pan Feng,
Li Bo,
Wang Jingqin,
Lv Changsen
Publication year - 2017
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-016-1889-5
Subject(s) - chemistry , surface tension , rheology , sulfonate , chemical engineering , sodium , enhanced oil recovery , viscoelasticity , critical micelle concentration , chromatography , micelle , composite material , organic chemistry , materials science , aqueous solution , thermodynamics , physics , engineering
The surface tension, surface dilational rheology, foaming and displacement flow properties of alpha olefin sulfonate (AOS) with inorganic salts were studied. The foam composite index (FCI), which reflects foaming capacity and foam stability, is used to evaluate foam properties. It is found that sodium and calcium salts can lead to decreases in AOS surface tension, critical micelle concentration, and molecular area at the gas–liquid interface. Sodium ions reduce the surface dilational viscoelasticity ( E ) and FCI of AOS, while calcium ions can enhance the E of AOS and make the FCI of AOS reach a maximum. In the solution containing calcium and sodium ions, the FCI of AOS is improved. Crude oil reduces the FCI of AOS. Injection pressure and displacing efficiency of AOS alternating carbon dioxide (CO 2 ) injection are higher than injections of water alternating with CO 2 or CO 2 alone in low permeability cores.