Fig. 3
From: Reactivation of variably sealed joints and permeability enhancement in geothermal reservoir rocks
Pre-deformation connected porosity and permeability of the Buntsandstein sandstones as a function of bedding and joint orientation. Joint-free samples are shown in the left panel (unfilled symbols); jointed samples are shown in the right panel (filled symbols). Circles denote Couches Intermédiaires (Box 117) samples; triangles denote Couches de Karlstal (Box 179) samples; squares denote Couches de Trifels (Box 388) samples. a, b, c Connected porosity. d, e, f Permeability. Measurement error is within symbol size