Modelling the near-wellbore rock fracture tortuosity: Role of casing-cement-rock well system, perforation and in-situ stress

Near-wellbore rock fracture is a key subject in subsurface energy extraction. Casing perforation completion perhaps the most used type of well design mainly comparison to open hole completion. However, effects combined casing-cementing-rock structure on pressure transmission fracturing have not been sufficiently addressed, but understanding some important phenomena hydraulic fracturing, such as tortuosity. Here we develop analytical-numerical model investigate mechanism near wellbore with realistic consideration boundary condition imposed by complete system. Different configurations can lead variation applied formation and hence affect propagation wellbore. Our results show, through enhanced, propagates more closely orientation smaller deflection angle breakdown increased. The near-well tortuosity crack be reduced decreasing thickness casing cement sheath, reducing Young's modulus increasing up around 15 GPa, based range values parameters. in-situ stress length cracking are also investigated. developed aid decision making terms improved technology optimization.