Methane sorption and storage characteristics of organic-rich carbonaceous rocks, Lurestan province, southwest Iran

The total gas storage capacity of the two sample sets was estimated as a function of depth based on all measured data and representative temperature and pressure gradients. Sorption generally tends to dominate the total storage capacity of shale gas systems in the low-depth/low-pressure range (as high as 90% depending on TOC content and specific pore volume), whereas in the great-depth/high-pressure range the volumetric storage capacity prevails.