Thermodynamically consistent model of shale swelling around a cylindrical wellbore

A modified version of the linear poroelasticity theory described by three elastic parameters is applied to shale swelling with an aqueous electrolyte. It is assumed that the shale behaves as an isotropic, ideal ionic membrane, and in this case, swelling depends only on the total stress and on the chemical water potential in pores of the rock. An analysis of at strain around the wellbore is made.