000			01833nab a2200193 4500
005			20260520001958.0
008			260224s2006 xxu
245	0	0	_aInvestigations on capillary and viscous displacement under ultrasonic waves
260			_a _b _cfeb. 2006
270			_a14/07/2011 ; 14/07/2011
300			_a4 p. ; 16-19
520			_aTranscripción del resumen del autor. In this paper, the influence of ultrasonic waves on capillary and viscous displacement of oil in porous media was investigated. Capillary (spontaneous) imbibition experiments were conducted using various fluid pairs such as air-water, mineral oil-brine, mineral oil-surfactant solution, kerosene-surfactant solution, and mineral oil-polymer solution. Berea sandstone and Indiana limestone cores were used as the matrix. Oil saturated cores were immersed into the aqueous phase and subjected to high intensity ultrasound from a specially designed ultrasonic chamber. The resulting recovery was recorded against time, and compared to a control experiment without ultrasound. A substantial increase in ultimate recovery was observed for most of the fluid pairs, with some improvements in recovery rate. To further investigate whether ultrasound induces a perturbation at the liquid-liquid interface of immiscible fluids, a series of Hele-Shaw type experiments were run. The resulting fingering pattern was strongly dependent on the interfacial tension of the fluid pair, and the injection rate. Ultrasound stabilized the fluid-fluid front of high interfacial tension fluid pairs, but generated larger instabilities when interfacial tension was low.
581			_a2
773	0		_tJournal of Canadian Petroleum Technology _g45
942			_cARTICULO
100	1		_aHamida, T. _942895
100	1		_aBabadagli, T. _96312
999			_c183742 _d183742