Poroelastic solutions in transversely isotropic media for wellbore and cylinder

✍ Scribed by Y. Abousleiman; L. Cui

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 907 KB
• Volume: 35
• Category: Article
• ISSN: 0020-7683
• DOI: 10.1016/s0020-7683(98)00101-2

✦ Synopsis

This paper presents closed!form solutions for the pore pressures and stress _elds for the inclined borehole and the cylinder\ induced by boundary stress perturbation in an anisotropic poroelastic medium[ The governing equations for the transversely isotropic poroelastic materials under the cylindrical coordinate system are presented[ The solution for the inclined borehole\ subjected to a three!dimensional far!_eld anisotropic stress _eld\ is derived with the borehole generator coinciding with the material axis of symmetry ^while the solutions for the cylinder are obtained under various loading conditions that are encountered in laboratory testing procedures[ The analysis shows\ in addition to the e}ect of time on stress and pore pressure variations\ that poromechanical anisotropic material coe.cients also play an important role in calculating the in! plane stress _elds\ which is not the case using the classical anisotropic theory of elasticity[