Application of optical image analysis to the assessment of pore space evolution after CO2 injection in sandstones. A case study

This paper presents the application of an automated image processing method for detection and analysis of pores in thin section petrographic microscopy (optical porosity). The technique is applied to pore size distribution and pore shape parameter measurements on Spanish sandstone samples before and after their exposure to CO2 under supercritical conditions (SC). The presented optical image analysis (OIA) protocol allows fast, low-cost,...