000			01870nab a2200205 4500
005			20260520002032.0
008			260224s2011 xxu
245	0	0	_aMechanism of the reversibility of asphaltene precipitation in crude oil
260			_a _b _cagos. 2011
270			_a04/04/2012 ; 04/04/2012
300			_a5 p. ; 316 - 320
520			_aTranscripción del resumen del autor. Asphaltene precipitation and deposition occur in petroleum reservoirs as a change in pressure, temperature and liquid phase composition and reduce the oil recovery considerably. In addition to these, asphaltene precipitates may deposit in the pore spaces of reservoir rock and form plugging, which is referred to as a type of formation damage, i.e. permeability reduction. In all cases above, it is of great importance to know under which conditions the asphaltenes precipitate and to what extent precipitated asphaltenes can be re-dissolved. In other words, to what extent the process of asphaltene precipitation is reversible with respect to change in thermodynamic conditions. In present work, a series of experiments was designed and carried out to quantitatively distinguish the reversibility of asphaltene precipitation upon the change in pressure, temperature and liquid composition. Experiments were conducted in non-porous media. Generally it was observed that the asphaltene precipitation is a partial reversible process for oil under study upon temperature change with hysteresis. However, the precipitation of asphaltene as a function of mixture composition and pressure is nearly reversible with a little hysteresis.
581			_a2
773	0		_tJournal of Petroleum Science & Engineering _g78
942			_cARTICULO
100	1		_aAbedini, Ali _952337
100	1		_aAshoori, Siavash _952338
100	1		_aTorabi, Farshid _952308
999			_c186986 _d186986