Questions of condition estimation of bobrikovsky oil deposits bottomhole productive formations zones (BPZ) of the Unvinskoye, Sibirskoye and Shershnevskoye oil fields dated for the Verhnekamsky deposit of potash salts are considered. Dependence between quantities of the skin-factor and dimensionless diagnostic sign which are defined at proces sing of RCP is investigated. Limit value of the diagnostic sign corresponding to worsened condition of BPZ is established.
