Nueva interpretación paleoambiental y su implicancia en la distribución de los reservorios areno-conglomerádicos de la Formación Los Molles en el área Centenario, Cuenca Neuquina

MONTENEGRO, M.S.; VEIGA, G.D.; GIMENEZ, B.; SCHWARZ, E.

Desarrollo de Hidrocarburos: Desarrollo con pensamiento no convencional

IAPG

Año: 2018; p. 127 - 150

The Los Molles Formation in the Centenario area is located on top of the Huincul arch in the southeastern margin of the Neuquén basin. Due to its marginal location and the strong tectonic influence associated with the evolution of this large-scale morphostructural element during the initial stages of its accumulation, it has been interpreted as the record of alluvial fans and sediment-laden fluvial systems. Through the integration of all the available core in the area and combination with microresistivity images and well logs, a new palaoenviromental model is proposed for the Los Molles Formation in this area. This unit might have evolved from a shallow marine system (for which offshore and shoreface facies are recorded) with local coarse-grained input, up into a coarse-grained deltaic system (braid delta) with record of delta front and delta plain facies associations. Based on this new interpretation the main reservoirs of the Los Molles formation were analyzed, integrating 3D seismic data, borehole images, well-to-well correlations and petrophysical properties in order to identify potential zones for development of the tight-gas targets in the area.