000			02638nab a2200205 4500
005			20260520002032.0
008			260224s2011 xxu
245	0	0	_aExperimental studying of pore morphology and wettability effects on microscopic and macroscopic displacement efficiency of polymer flooding
260			_a _b _cagos. 2011
270			_a04/04/2012 ; 04/04/2012
300			_a17 p. ; 347 - 363
520			_aTranscripción del resumen del autor. Pore morphology and wettability of a porous medium have dominating effects on microscopic displacement efficiency, and consequently on the ultimate oil recovery. To provide a better understanding of the effects of these parameters on microscopic displacement mechanisms and macroscopic performance of a polymer flood process, a comprehensive experimental study was conducted using five two-dimensional glass micromodels. A combination of three wettability conditions and five different pore structures was used in this study. The selected scenarios include four homogeneous synthetic pore networks at water-, mixed- and oil-wet conditions. A random network that represents the pore space in Berea sandstone was also used for further investigation. Image processing technique was applied to analyze and compare displacement mechanisms and displacement process efficiency in each experiment. Microscopic mechanisms, such as oil and polymer solution trapping, configuration of wetting and non-wetting phases, flow of continuous and discontinuous strings of polymer solution, polymer solution snap-off, distorted flow of polymer solution, emulsion formation, and microscopic pore-to-pore sweep of oil phase were observed and monitored in conducted experiments. Experimental results showed that water- and mixed-wet media generally have comparable and higher recoveries in contrast with oil-wet media. Moreover, the results confirmed a significant dependency on the pore structure and wettability of the media on both displacement mechanisms as well as oil recoveries. This experimental study illustrates the successful application of glass micromodel techniques for studying enhanced oil recovery (EOR) processes in a five-spot pattern, and also provides a useful reference for understanding the displacement mechanisms involved in a polymer flood process at different pore morphologies and wettabilities of porous media.
581			_a2
773	0		_tJournal of Petroleum Science & Engineering _g78
942			_cARTICULO
100	1		_aEmami Meybodi, Hamid _952344
100	1		_aKharrat, Riyaz _939017
100	1		_aNasehi Araghi, Majid _952345
999			_c186995 _d186995