Mixed-Mode Fracture Modelling of the Near-Wellbore Interaction Between Hydraulic Fracture and Natural Fracture

Abstract The interaction between hydraulic fractures (HF) and natural (NF) is one of the most fundamental phenomena in fracturing. near-wellbore HF NF significantly affects fracking-related operations including injected fluid flow, proppant transport well productivity. However, nature fracturing modes, combined with hydro-mechanical coupling, poses great difficulties challenges addressing this problem. Literature review suggests that little research has been undertaken on interaction, especially considering fully coupled mixed-mode process. This paper develops a new fracture model incorporating Mohr–Coulomb criterion cohesive crack model. implemented into ABAQUS solver by in-house FORTRAN subroutines. rock matrix interfaces are both flow. developed then validated comparing results analytical solutions experimental results. Moreover, effects approach angle, location, situ stress, cohesion strength friction angle NF, flow rate investigated. Three i.e., cross, deflect offset, reproduced through numerical method. deflection shear-dominated fracture. A high injection pressure wellbore tends to drive cross located close wellbore. smaller is, larger offsetting ratio is. low can help activate near when intersected HF.