Simulation of Wellbore Stability during Underbalanced Drilling Operation

Table 1

Reservoir inputs used for validation of poroelastic numerical model using circular homogenous reservoir.

Parameter	Value
Poisson ratio	0.2
Young’s modulus	40 GPa
Maximum horizontal stress	40 MPa (5800 psi)
Minimum horizontal stress	37.9 MPa (5500 psi)
Wellbore pressure ()	6.89 MPa (1000 psi)
Initial reservoir pressure ()	37.9 MPa (5500 psi)
Fluid bulk module ()	2.5 GPa
Fluid compressibility	1.0 × 10^−5 Pa^−1
Biot’s coefficient	1.0
Fluid viscosity	3 × 10^−4 Pa⋅s
Matrix permeability	9.869 × 10^−18 m^2 (0.01 md)
Wellbore radius	0.1 m
Reservoir outer radius	1000 m