Petrographic Scanning Electron Microscopy (SEM)

Supplementary to Thin Section Analysis, Scanning Electron Microscopy (SEM) is often necessary to determine reservoir sensitivity and will show:

Clay minerals such as fine, fibrous illite, pore lining smectite or chlorite and migratable kaolinite are often not visible in thin section. SEM analysis clearly shows the relationship of these clay types to the pores and pore throats.

SEM Image of Illite clay SEM Image of Kaolinite clay
SEM Images of illite and kaolinite clay.