000			01764nab a2200193 4500
005			20260520000311.0
008			260224s2011 xxu
245	0	0	_aQuantitative shale characterization of the tidally influenced Sego Sandstone
260			_a _b _cjul. 2011
270			_a31/08/2011 ; 31/08/2011
300			_a20 p. ; 1207-1226
520			_aTranscripción del resumen del autor. Vertical permeability is a critical parameter to estimate when modeling tidally influenced deltaic successions. The Campanian Sego Sandstone, in the Book Cliffs of Utah, is an outcrop analog for tidal systems with primary reservoirs being deposited as tidal bars in both confined and unconfined settings. A simple sand-shale model was used to quantify the effective vertical permeability using the shale character of the Sego Sandstone. Shale lengths, widths, thicknesses, and frequencies were measured from high-resolution light detection and ranging point clouds. Shales in confined tidal bars are approximately three times as long (mean, 16.3 m [53.5 ft]) and as wide (mean, 5.52 m [18.1 ft]). Within unconfined tidal bars, shales are roughly equidimensional (mean length, 18.6 m [61.0 ft]; mean width, 18.3 m [60.0 ft]). The different shale dimensions of confined and unconfined tidal bars result in different effective vertical permeability distributions, indicating that these two bar types behave differently under conditions of fluid flow. In analogous reservoirs, composed primarily of tidal bars, it is essential to differentiate and map confined and unconfined tidal environments.
581			_a7
773	0		_tAAPG Bulletin _g95
942			_cARTICULO
100	1		_aBurton, Darrin _944040
100	1		_aWood, Lesli J. _944041
999			_c185351 _d185351