000			01904nab a2200205 4500
005			20260520002020.0
008			260224s2011 xxu
245	0	0	_aNumerical investigation of potential injection strategies to reduce shale barrier impacts on SAGD process
260			_a _b _cmar. 2011
270			_a07/09/2011 ; 07/09/2011
300			_a8 p. ; 57-64
520			_aTranscripción del resumen del autor. It is well known that shale barriers significantly reduce steam-assisted gravity drainage (SAGD) performance in Athabasca fields. An extensive 2D simulation study shows that the flow resistance at the end of shale barriers and the extra heat absorbed by the residual water inside the unproductive shale barrier are the main reasons for the shale barrier effects. Long continuous shale barriers located vertically above or near the wellbore delay production performance significantly. We investigated potential strategies, including solvent coinjection, top injector application, or a combination of both, to reduce the shale barrier impacts. Solvent in the vapour phase can pass through the narrow flow path at the end of a shale barrier. Meanwhile, because the phase condenses from vapour to liquid, solvent efficiently reduces the flow resistance of the shale barrier. Liquid solvent coinjection can accelerate the near-wellbore flow and reduce the residual oil saturation at the wellbore vicinity. Coinjecting a multicomponent solvent can flush out the oil at different areas with different drainage mechanisms from vaporized and liquid components. Additional injector application at the top of the reservoir results in only marginal improvement.
581			_a3
773	0		_tJournal of Canadian Petroleum Technology _g50
942			_cARTICULO
100	1		_aLi, Weigiang _951471
100	1		_aMamora, Daulat _951472
100	1		_aLi, Yamin _951473
999			_c185440 _d185440