000			02889nam a2200253 4500
005			20260520010340.0
008			260224s xxu
082			_a068.82 553.28 C62 2014 0015581
245	0	0	_aOptimización de la discriminación de arenas con modelos de física de roca en sedimentos poco consolidados. Análisis en yacimiento fluvial de edad terciaria en los llanos colombianos
270			_a15/05/2020 ; 21/03/2017
300			_a19 p.
520			_aSand discrimination optimization with rock physics models of sediments poorly consolidated The area of study associated to Llanos Basin in Colombia presents great potential related to heavy oil from a fluvial tertiary reservoir. Weak mechanical properties contrast between oil and formation water makes the direct hydrocarbon detection impossible. The experience in the basin shows that clean sands facies with high effective porosity are usually associated with productive zones, due to their flux capabilities for viscous crudes. Seismic prestack elastic inversion was selected as the methodology for conducting the identification and mapping of good quality sands based on the elastic properties contrast between different lithologies. However, it was hard to find out rock properties capable to discriminate sand from shales, endangering the success of the project. A detailed analysis of available well information allowed to outline an alternate approach based on a) the redefinition of petrophysical evaluation emphasizing on shale volume and effective porosity and b) the regeneration of shear wave velocity logs by means of poorly consolidated siliciclastic rock physics model. Core analysis revealed the presence of quartzose siltstones that, in terms of mechanical properties, behave as shale but the original petrophysical evaluation based on gamma ray classified them as possible reservoir. The new approach based on density and velocity logs is appropriate for seismic detection due to its sensitivity to mechanical properties. New relations between modeled elastic parameters and redefined reservoir properties produced enhanced lithology discrimination. It allowed seismic information to successfully predict a good reservoir quality geobody as a guide for field development
773			_g
942			_cCONGTP
100	1		_aCarrero, Javier _956287
100	1		_aBertorelli, Gustavo _956288
100	1		_aSalinas, Trino _956289
100	1		_aÁlvarez, Gabriel _921012
100	1		_aTavella, Juan _956290
111	2		_aCongreso de Exploración y Desarrollo de Hidrocarburos (9no. : 2014 nov. 3-7 : Mendoza) _954287
111	2		_aSimposio de Geofísica "La geofísica : puentes de integración" (2014 nov. 3-7 : Mendoza) _956096
999			_c190146 _d190146
856			_uhttps://biblioteca.iapg.org.ar/ArchivosAdjuntos/CONEXPLOR2014/Simposiodegeofisica/3-Optimizaciondeladiscriminacion.pdf