000			01874nab a2200205 4500
005			20260520000244.0
008			260224s2010 xxu
245	0	0	_aCharacterization of deformation bands associated with normal and reverse stress states in the Navajo Sandstone, Utah
260			_a _b _csep. 2010
270			_a13/10/2010 ; 13/10/2010
300			_a23 p. ; 1453-1475
520			_aTranscripción del resumen del autor. Deformation-band networks at Buckskin Gulch, Utah, and the Big Hole fault, Utah, both formed in the Navajo Sandstone with similar initial porosity and permeability, at similar burial depths, and result in similar reductions in effective permeability. However, the band networks at Buckskin Gulch, which formed in a contractional tectonic setting, appear to be much more areally extensive and are not associated with any discrete faults having displacements greater than at most a few meters and more likely only a few tens of centimeters. In contrast, the bands at Big Hole fault are generally limited to the damage zone of a about 25-m (82-ft) displacement normal fault formed in a locally extensional environment. These results suggest that deformation bands in well core from extensional settings may be indicative of discrete damage zones associated with normal faults, whereas deformation bands in well core from contractional settings may be indicative of much more areally extensive deformation-band networks. The band networks in both cases will affect similar reductions in reservoir effective permeability, but only in the latter case will the affected area be sufficiently large to affect well performance.
581			_a9
773	0		_tAAPG Bulletin _g94
942			_cARTICULO
100	1		_aSolum, John g. _947078
100	1		_aBrandenburg, J.P. _947079
100	1		_aNaruk, Stephen J. _947080
999			_c177387 _d177387