A porothermoelastic solution of the general problem of the inclined borehole in a transversely isotropic porous material is presented herein and compared with the isotropic porothermoelastic solution. The governing equations are outlined for the case of general anisotropy and specialized for a transversely isotropic poroelastic material under nonhydrostatic and nonisothermal in situ conditions. A superposition scheme is employed to obtain the analytical solutions within the isotropic and transversely isotropic poromechanics theory. The borehole generator is assumed to coincide with the material axis of symmetry, in the case of transverse isotropy, yet subjected to a three-dimensional state of stress. A systematic analysis has been carried out to evaluate the effect of the anisotropy of the poromechanical material parameters as well as the thermal material properties on stress and pore pressure distributions and the potential impact on the overall stability of deep wellbore drilling.
Issue Section:
Technical Papers
Keywords:
porous materials,
anisotropic media,
thermoelasticity,
porosity,
thermal stresses,
heat transfer,
thermal expansion,
diffusion
Topics:
Anisotropy,
Fluids,
Pressure,
Stress,
Temperature,
Shear stress,
Porous materials,
Diffusion (Physics)
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