Abstract

This study presents geomechanical and petrophysical characterization focused on analyzing outcrop analogue samples of clastic reservoirs and mudstones equivalent to the caprock in the Cerro Colorado de Galveniz (Chubut) and the Cerro Ballena (Santa Cruz) area, Argentina. The mean and median values of dry density measured in rocks of Cerro Ballena (CB) area are at least 0.5 g/cm3 higher than those of Cerro Colorado de Galveniz (CG) area. The CB values show a more extensive range of variation in CB than in CG. The Schmidt hammer index shows that CB locality has higher values than CG, with a difference of approximately 12R among both localities' median and mean values. The permeability was measured with a handheld portable air-permeameter, and the highest values were found in the channel lithofacies. A marked heterogeneity was seen in the permeability values depending on the direction of the measurement. It was carried out perpendicular and parallel to the stratification, being the parallel bearing which presented higher values. This study demonstrates the potential of testing with portable tools for rapid and non-destructive geomechanical and petrophysical characterization. The results contribute to the comprehensive understanding of outcrop analogues to improve subsurface interpretations associated with static and dynamic models.

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