000			03615nab a2200361 4500
005			20260520000323.0
008			260224s2015 xxu ing
041			_aInglés
245	0	0	_aFractured reservoirs in the Eastern Foothills, Colombia, and their relationship with fold kinematics
260			_a _b _cago. 2015
270			_a18/10/2017 ; 18/10/2017
300			_a34 p. ; 1599-1633
520			_aTranscripción del resumen del autor: Analysis of fracture systems in subsurface structures is limited by the amount and uncertainty of available data. With the aim of analyzing the distribution of fracture systems, we studied surface structures as analogs for oil fields in the Previous HitfracturedNext Hit Previous HitreservoirsNext Hit of the Llanos Previous HitfoothillsNext Hit of Previous HitColombiaNext Hit. Here, we document the presence of four widespread fracture systems whose distribution is related to Previous HitfoldNext Hit geometry and folding mechanism. At surface, in the Tierranegra and Silbadero anticlines, the principal fracture systems are symmetrical with respect to northeast- and northwest-trending Previous HitfoldNext Hit axes, showing higher fracture intensities in the forelimbs of the structures. In the Guavio anticline, higher fracture intensities are located in the backlimb, with principal east–west and northwest–southeast directions. In contrast, we document northeast–southwest fractures near the hinge zones in the adjacent synclines. This distribution suggests that in the Guavio anticline, fractures respond to movement of the hanging-wall above a ramp, consistent with a fault-bend-Previous HitfoldNext Hit model. Whereas, in the Tierranegra and Silbadero anticlines, fractures respond to limb rotation and hinge migration consistent with detachment Previous HitfoldNext Hit models. Comparing these with subsurface structures, we identified that El Morro anticline has fracture distributions like those in the Tierranegra and Silbadero anticlines, but have higher fracture intensities. In the case of the Cusiana Structure, fracture intensities are higher in the crest but not in the limbs, and intensities differ from the ones found in the Guavio anticline, showing that these structures are not appropriate analogs. The results show how fracture distribution depends on structural position and Previous HitfoldNext Hit evolution, and is controlled in part by folding mechanism. This suggests that models based on Holocene Previous HitfoldNext Hit geometry cannot accurately predict the observed fracture distributions and should not be used to construct discrete fracture network models. Instead, the patterns we describe can be used as a guide for similar structures. Our work illustrates the possibility of having different fracture patterns and fracture abundances in adjacent folds in the same Previous HitfoldTop-thrust belt.
581			_a8
773	0		_tAAPG Bulletin _g
942			_cARTICULO
100	1		_aTamara, Javier _957409
100	1		_aMora, Andrés _957376
100	1		_aRobles, Wilmer _957402
100	1		_aKammer, Andreas _957410
100	1		_aOrtiz, Alberto _9668
100	1		_aSanchez-Villar, Nelson _957411
100	1		_aPiraquive, Alejandro _957412
100	1		_aRueda, Luz Helena _957413
100	1		_aCasallas, Wilson _957405
100	1		_aCastellanos, Jaime _957414
100	1		_aMontaña, Jorge _957415
100	1		_aParra, Luis Guillermo _957416
100	1		_aCorredor, Jaime _957417
100	1		_aRamirez, Ángela _957418
100	1		_aZambrano, Enus _957419
999			_c191359 _d191359