Análisis del campo de esfuerzo horizontal que actúa sobre la Formación Vaca Muerta en la Cuenca Neuquina, Argentina

The Vaca Muerta Formation in the Neuquén Basin, Argentina, is a significant hydrocarbon reservoir characterized by complex geological and tectonic forces that influence the horizontal stress field. This study isolates and analyzes the orientations of the maximum horizontal stress (SHmax) using borehole breakout data from the Vaca Muerta Formation from 30 wells across the basin. The results indicate a predominant SHmax orientation trending WSW-ENE to E-W, influenced by regional tectonic forces, including the convergence of the Nazca and South American plates and topographic axes orientation. However, deviations in SHmax orientations towards SW-NE and SE-NW suggest additional controls from basement structures, notably Triassic-Jurassic half-grabens. The integration of breakout analysis with geological models highlights the interplay of first-, second-, and third-order stress controls, which are crucial for optimizing hydraulic fracturing strategies in this prolific shale formation. Understanding these stress regimes enhances the efficiency and sustainability of resource extraction in the Vaca Muerta Formation.