000			02124nab a2200253 4500
005			20260520003059.0
008			260224s2012 xxu ing
041			_aInglés
245	0	0	_aEffect of Added Surfactants on the Dynamic Interfacial Tension Behaviour of Alkaline/Diluted Heavy Crude Oil System
260			_a _b _cnov./dic. 2012
270			_a07/05/2013 ; 07/05/2013
300			_a5 p. ; 963-968
520			_aTraducción del resúmen del autor: This study has been undertaken to get a better understanding of the interactions between Enhanced Oil Recovery (EOR) surfactants used in chemical flooding and in situ surfactants present in an heavy oil. We report an experimental study of dynamic Interfacial Tension (IFT) behaviour of diluted heavy oil/surfactant enhanced-alkaline systems. The dynamic IFT was measured using pendant drop and spinning drop tensiometers. The dynamic IFT between diluted heavy oil and alkaline solution (pH 11) with no added surfactant increased sharply with time, which was attributed to the transfer of the in situ surfactant (produced by saponification of the acids groups present in the crude oil) across the oil/water interface. The addition of Sodium Dodecyl Benzene Sulfonate (SDBS) above the Critical Micellar Concentration (CMC ~ 0.002%), changed completely the dynamic IFT behaviour of the diluted heavy oil as the IFT strongly decreased and finally reached a plateau, of about 1.5 × 10-3 mN/m at a concentration of only 0.02%. We attributed the efficiency of SDBS to a synergistic effect between the in situ surfactant and the added surfactant that form a mixed interfacial monolayer, which is very efficient in decreasing the IFT to ultra low values and in resisting mass transfer across the oil/water interface.
581			_a6
773	0		_tOil and Gas Science and Technology _g67
942			_cARTICULO
100	1		_aTrabelsi, S. _953101
100	1		_aHutin, A. _953102
100	1		_aArgillier, J.F. _916524
100	1		_aDalmazzone, C. _912714
100	1		_aBazin, B. _919892
100	1		_aLangevin, D. _919879
999			_c187655 _d187655