Investigation of microscopic pore structure variations of shale due to hydration effects through SEM fixed-point observation experiments

Weibo SUI,Yingying TIAN,Chenhao YAO

Table 2 Results of organic carbon content analysis and XRD analysis for Samples 1 to 4.

Sample No. TOC value/% Mineral content/% Clay Quartz K-feldspar Plagioclase Calcite Dolomite Pyrite Ankerite Illite Chlorite Kaolinite Montmorillonite 1 0.18 45.4 42.2 12.4 23.9 15.9 5.6 2 1.00 29.8 46.1 10.8 3.7 9.6 15.1 2.4 0.9 11.4 3 5.50 16.8 67.0 1.5 3.9 1.4 6.1 3.3 7.2 0.8 3.9 4.9 4 0.81 18.9 37.5 0.4 5.0 14.4 1.3 2.3 19.8 17.6 0.8 0.4 0.5