Experimental techniques have been developed to measure two poroelastic parameters: unjacketed bulk modulus Ks' and unjacketed pore modulus Ks'. Ks' is measured on samples with no jacket that are instrumented with strain gages, confining fluid (oil) penetrates inside the material and hydrostatic mean stress is equal to pore pressure, so the overal unjacketed bulk modulus can be calculated. Ks' is measured on water-saturated rock by determining the change in pore volume of the specimen from accurate measurements on pore pressure controller, while the difference between mean stress and pore pressure is preserved constant. Ks' and Ks' are measured to be pressure-independent for Berea sandstone and Opalinus clay (shale). Ks' ≈ Ks' for the clay-rich shale, but Ks' is smaller than Ks' and bulk modulus of quartz for quartz-rich Berea sandstone. This result is explained by the presence of non-connected porosity.