| abstract |
Properties of a subterranean stratum penetrated by a well bore arenmodified, for example to increase the resistance of the stratum to shear failure, bynpumping a hardenable epoxy composition having flexibility upon hardening andncomprising an epoxide-containing liquid or an epoxy resin and an epoxide-containingnliquid and a hardening agent, into the subterranean stratum by way ofnthe well bore and by way of the porosity of the stratum, and allowing it to hardennin the stratum. |