Resumen

MADERO, Hernan Dario; RUEDA, Jenny Paola; ORTIZ, Alberto  y  COLEGIAL, Juan Diego. STRATIGRAPHIC ANALYSIS OF THE MUGROSA FORMATION, IN PILOT AREA, LLANITO FIELD, MIDDLE MAGDALENA BASIN. bol.geol. [online]. 2010, vol.32, n.1, pp.27-44. ISSN 0120-0283.

Mugrosa Formation in the Llanito Field is an important reservoir of Tertiary age. Studies and analysis of core and outcrops identify three main facies, such as flood plains, channels sands and crevasses splay. For many wells in the field, have two log wells are available SP and GR taken especially on the Mugrosa Formation. To identify the behavior of these facies in subsurface, the methodology used in this study is based on identifying these facies supported by well logs (electrofacies). Later identified the area drawing five transects with 37 wells in total, making stratigraphic correlations supported sequence stratigraphy, defining 7 cycles of high resolution to delineate areas of higher and lower A/S. Also be prepared facies maps, this to define the continuity and change lateral of facies especially to delineate the geometry of channels sands (Main reservoirs) which show significant trends defining areas with a high accumulation the sands body to SE of field. More over is it can to observe that river directions that originate this sediments is NE-SW, to north of field these bodies sand (Channels sands) are losses thickness and continuity, also is possible observe that this sands bodies are more continuity and thickness when up stratigraphy in the correlations.

Palabras clave : Mugrosa Formation; Facies; Electrofacies; Stratigraphics Correlations.

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