||Our experimental study relates to several sandstone samples originating from a tight gas field explored by GDF/Suez. The aim of the study is to characterize experimentally the petro-physical properties of these materials, in order to improve our knowledge on their gas recovery potential. The initial characterisation of these sandstone samples is performed in the dry and in the “as received” states: porosity, initial water saturation level, gas permeability at Pc=5MPa confining pressure. Further, sandstone samples have been preserved into hermetic chambers at fixed relative humidity (RH) values, until mass (and water saturation level) stabilisation. Gas permeability is measured at stabilisation, from 5 to 40MPa confinement. This method is limited to Sw ≤ 21%. In order to reach higher water saturation levels Sw, an iterative method has been developed, which allows to reach values as high as 70%. For two different samples, we have evaluated the water saturation threshold above which no more gas passes through the porous network, due to hydraulic cut-off, under increasing Pc. At intermediate saturation level (on the order of 40%), two different sample types have been identified, depending on whether their gas relative permeability depends, or not, on Pc. For one sample of each type, poro-elastic experiments provide drained bulk modulus Kb and solid matrix bulk modulus Ks, from which Biot’s coefficient b is deduced. From these tests, we show that the closure of some portion of the connected porous network is bound to explain the sensitivity of sandstone permeability to confining pressure.