000			01699nab a2200193 4500
005			20260520001759.0
008			260224s2010 xxu
245	0	0	_aDynamic fracture propagation in hydraulic re-fracturing
260			_a _b _cfeb. 2010
270			_a17/06/2010 ; 17/06/2010
300			_a7 p. ; 266-272
520			_aTranscripción del resumen del autor. Re-fracturing is important for stimulating low-permeability reservoirs, for the effective production duration after the initial fracturing is short and needs to be stimulated again. However, the fracture configuration caused by re-fracturing affects the re-stimulated production greatly. Based on fracture mechanics and hydraulic fracturing theory, a model for dynamic path of fracture propagation during re-fracturing is proposed, and computation shows that stress difference and initiation angle contribute to changes in fracture propagation path. The new fracture changes its direction gradually, until to the direction of the maximum horizontal stress. Horizontal stress difference has great obvious influence on fracture dynamic reorientation, the larger the horizontal stress difference is, the shorter the distance of reoriented fracture away from the maximum horizontal stress will be. The predicted paths are in good accordance with those from the surface micro-seismic monitoring and tri-axial large-scale experiments. The model and conclusions are significant to further understanding of re-fracturing process.
581			_a3-4
773	0		_tJournal of Petroleum Science & Engineering _g70
942			_cARTICULO
100	1		_aZhang, GuangQing _942940
100	1		_aChen, Mian _926201
999			_c171162 _d171162