Analysis Of The Horizontal Stress Field Acting On Vaca Muerta Formation In The Neuquen Basin, Argentina

Abstract

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 maximum horizontal stress (SHmax) using borehole breakout for VacaMuerta Formation data from 30 wells across the basin. The results indicate a predominant SHmax orientation trending SW-NE to E-W, influenced by regional tectonic forces, including the convergence of the Nazca and South American plates and topographic axes. However, deviations in SHmax orientations towards SSW-NNE and SE-NW suggest additional controls by basement structures, notably Triassic-Jurassic hemi-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.