The plane one-dimensional and radially symmetric problems of injection of superheated steam into a porous medium saturated with gas are considered. Self-similar solutions are constructed on the assumption that in this case four zones are formed in the porous medium, namely, a gas flow zone, superheated and wet steam zones, and a water slug zone formed due to steam condensation. On the basis of the solution obtained, both the effects of the boundary pressure, mass flow rate, and temperature of the injected superheated steam and the effect of the initial state of the porous medium on the propagation of the hydrodynamic and thermal fields in the porous medium are studied.Keywords: flow through a porous medium, superheated steam, water, gas, heat transfer, phase transitions.where m, ρ i , and v i are the porosity, the phase density, and the phase velocity, respectively. The values n = 0 and n = 1 correspond to the plane and radial problems, respectively. The subscripts ν, lν, l, g, and s denote superheated steam, saturated steam, water, gas, and the skeleton, respectively.