Fractures and Stress Analysis Using Cross-Dipole Sonic Data in Cased Hole Through Dispersion Crossover – Tal Block, KPK, Pakistan Case Study

Abstract In this study, we showcase a case examination, emphasizing the importance of dispersion crossover analysis from cross-dipole sonic data in a cased hole environment by using the slowness-frequency domain, utilizing two vertical wells drilled in the Tal block located in the northern region of Pakistan with highly complex geological conditions. Dispersion analysis is employed to distinguish the source of anisotropy by examining the fast and slow shear responses in low porosity Carbonates and Sandstone to identify fractures, their orientation, and the direction of maximum horizontal stress.