Pore contribution corrected quantifying of surface roughness

A non-transitory, computer-readable medium having stored therein program code for determining surface roughness excluding pore size contribution, the program code comprising instructions to:

• determine, with a surface height map of a formation sample, a first length scale corresponding to pore size based, at least in part, on measurements of surface height variations from a first data representation of a formation sample;
• filter the surface height map based, at least in part, on the first length scale to generate a pore feature map, wherein the pore feature map comprises measurements of surface height variations of the surface height map that are within the first length scale;
• subtract the pore feature map from the surface height map to generate a pore contribution corrected surface height map;
• and
• quantify surface roughness of the formation sample based, at least in part, on the pore contribution corrected surface height map.

An apparatus comprising:

• a processor;
• and
• a machine-readable medium having program code executable by the processor to cause the apparatus to,
• determine, with a surface height map of a formation sample, a first length scale corresponding to pore size based, at least in part, on measurements of surface height variations from a first data representation of a formation sample;
• filter the surface height map based, at least in part, on the first length scale to generate a pore feature map, wherein the pore feature map comprises measurements of surface height variations of the surface height map that are within the first length scale;
• subtract the pore feature map from the surface height map to generate a pore contribution corrected surface height map;
• and
• quantify surface roughness of the formation sample based, at least in part, on the pore contribution corrected surface height map.