In Situ Stress Determination Based on Acoustic Image Logs and Borehole Measurements in the In-Adaoui and Bourarhat Hydrocarbon Fields, Eastern Algeria

The study of in situ stress from image logs is a key factor for understanding regional stresses and the exploitation hydrocarbon resources. This work presents comprehensive geomechanical analysis two eastern Algerian fields to infer magnitudes principal components field orientation. Acoustic borehole measurements were used this research aid our development. studied In-Adaoui Bourarhat encompass combined thickness 3050 m Paleozoic Mesozoic stratigraphy, with primary reservoir facies Ordovician interval. sandstone interval indicates an average Poisson’s ratio (v) 0.3, 100–150 MPa UCS, 27–52 GPa Young’s modulus (E). Direct formation pressure indicate that hydrostatic pore regime. Density-derived vertical had 1.1 PSI/feet gradient. Minimum horizontal modeled both effective ratio-based approach yielded 0.82 gradient, as validated leak-off test data. Drilling-induced tensile fractures (DITF) compressive failures, i.e., breakouts (BO), identified acoustic logs. On basis DITF criterion, maximum gradient was found be 1.57–1.71 PSI/feet, while BO width-derived 1.27–1.37 PSI/feet. Relative strike-slip A mean SHMax orientation N130°E (NW-SE) interpreted wellbore classified B-quality indicators following World Stress Map (WSM) ranking scheme. inferred magnitude agreement trend western Mediterranean region provide development hydraulic fracturing low-permeable reservoir. assessments, drilling strategies are discussed, optimization opportunities identified.