Examinando por Materia "ROCAS - ANÁLISIS"

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    Diseño de parámetros de adquisición sísmica 3D orientado a la detección de fracturas asistido por modelado sísmico anisótropo
    (Universidad EAFIT, 2013) Vega Delgado, Juan Carlos; Checa Jiménez, Jaime; Mora Bohórquez, Andrés Roberto
    The improving of seismic images with low illumination is possible a trough the new seismic acquisitions planned using seismic modeling and specific objectives to illuminate in areas where it has “low illumination” -- This work is focused to development a theory to improve the illumination of the subsurface, based in the ray tracing and it having into account the anisotropy effect that both, overburden and geological unit can to print to seismic wave registered -- In the first chapters, we try to rebuild the anisotropic effect increasingly complex analysis to have a geological model representative of a prospective field, which is affected by intense fracturing and this affects the quality of the currently acquired seismic, so we have created a seismic model with HTI anisotropy to evaluate the possibility of improving the quality of a new seismic design that can be added to the existing seismic through a processing flow -- Results show that to use a ray tracer methodology in “ghost zones”, is possible to find a new geometry in surface that really adds the illumination in Problem areas with interest in fracture reservoirs
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    Modelo cronoestratigráfico para el emplazamiento de los depósitos de vertiente en el Valle de Aburrá.
    (Universidad Nacional de Colombia, 2006) Rendón G., Diego Armando; Toro V., Gloria Elena; Hermelin Arbaux, Michel; Universidad EAFIT. Departamento de Geología; Diego Armando Rendón G. (drendong@eafit.edu.co); Gloria Elena Toro V. (gtoro@eafit.edu.co); Michel Hermelin Arbaux (hermelin@eafit.edu.co); Geología Ambiental e Ingeniería Sísmica (GIGAI)
    This paper presents new stratigraphic and chronologic data related with a widespread and complex sequence of slope deposits located at "El Poblado" sector, southeast area of the Medellín City, and Envigado County. Geomorphologic cartography, stratigraphic work in civil excavations, and fission track ages of interbedded volcanic ash deposits let us to divide the slope deposits in at least four stages: I, II, III, and IV. Such slope materials, mainly mud and debris flows, present a staircased distribution (telescopic). The oldest deposits, stages I and II, crop out on the middle and higher parts of the slope; while the younger ones, stages III and IV, show wide and nicely preserved fan shape over slope foothills. The oldest ages found in volcanic zircons (obtained around 30 m depth) reach 2.63 Ma, Early Pliocene, representing the maximum age of stage I, which lower age is approximately 1.8 Ma. Stage II has a wide thickness range, and ages between 2.0 and 0.9 Ma, Late PliocenePleistocene. Finally, behind deposits belonging to stage III, other authors report peat layers with ages beyond of the application time span of C14 method (older than 40k.a.). In addition, several basement zircons were found in the deposits, with ages between 45 and 48 Ma.
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