This blog focuses upon stylolites which are structures that either form during burial or by later tectonic movements and have a serrated appearance on rock surfaces.
Deformation bands (permeability reducing) and open fractures (enhancing) can co-exist in a sandstone reservoir but owing to timing (the d-bands form early during burial), the open fractures can still assist or provide essential reservoir permeability.
Deformation Bands can drastically impact the permeability of otherwise good quality reservoir sandstones. This example is from Permian Sandstones, N of Oslo in Norway. Here we look at some of it's key structures.
Any info on the structure/d - bands of this outcrop would be appreciated.