Figure 18. Photomicrographs showing the shattered and migrated kaolinite to block throats. (A) Scanning electron microscopy (SEM) image showing throats before brine-flow test (EU35, nitrogen permeability [kg] = 0.190 md, porosity [φ] = 9.48%). (B) An SEM image showing throats blocked by shattered and migrated kaolinite (EU35, kg = 0.147 md, φ = 9.47%).