TY - SER AU - Madge,Carl AU - Zhang,Jincai AU - Zhang,Jincai TI - Predict predrill pressure and stress KW - Integridad de pozos KW - Condiciones operativas KW - Presión en pozos N2 - Reducing serious wellbore failures requires accurate prediction of pore pressure, in-situ stress, shear failure gradient and fracture gradient ER -