000			01725nab a2200193 4500
005			20260520001753.0
008			260224s2009 xxu
245	0	0	_aX-ray computed-tomography observations of water flow through anisotropic methane hydrate-bearing sand
260			_a _b _cjun. 2009
270			_a14/06/2010 ; 10/06/2010
300			_a12 p. ; 121-132
520			_aTranscripción del resumen del autor. We used X-ray computed tomography (CT) to image and quantify the effect of a heterogeneous sand grain-size distribution on the formation and dissociation of methane hydrate, as well as the effect on water flow through the heterogeneous hydrate-bearing sand. A 28 cm long sand column was packed with several segments having vertical and horizontal layers with sands of different grain-size distributions. During the hydrate formation, water redistribution occurred. Observations of water flow through the hydrate-bearing sands showed that water was imbibed more readily into the fine sand, and that higher hydrate saturation increased water imbibition in the coarse sand due to increased capillary strength. Hydrate dissociation induced by depressurization resulted in different flow patterns with the different grain sizes and hydrate saturations, but the relationships between dissociation rates and the grain sizes could not be identified using the CT images. The formation, presence, and dissociation of hydrate in the pore space dramatically impact water saturation and flow in the system.
581			_a3-4
773	0		_tJournal of Petroleum Science & Engineering _g66
942			_cARTICULO
100	1		_aSeol, Yongkoo _942528
100	1		_aKneafsey, Timothy J. _937731
999			_c170913 _d170913