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