Assessment of Chemical Effects on Wellbore Stability in Transition Shale Formation

Table 8

Parameters used in the finite element modeling.

Parameters	Values
Wellbore radius, (m)	0.1
Young’s modulus, (GPa)	15.0
Poisson’s ratio,	0.189
Undrained Poisson’s ratio,	0.31
Pore pressure, (MPa)	48.60
Maximum horizontal stress, (MPa)	73.80
Minimum horizontal stress, (MPa)	64.80
Vertical stress, (MPa)	81.36
Mud pressure, (MPa)	52.20
Matrix permeability, (mD)	0.02
Bedding permeability, (mD)	0.2
Blocking efficiency	0.10
Rock matrix cohesion, (MPa)	8
Internal friction angle of rock matrix, (°)	35
Bedding plane cohesion, (MPa)	6
Internal friction angle of bedding plane, (°)	32