Influence of Migration and Plugging of Nanoparticles on Coal Permeability in Coal Reservoirs

Table 1

Rock mineral analysis.

Serial number	Sample name	Mineral type and content (%)						Total amount of clay minerals (%)
		Quartz	Soda feldspar	Calcite	Dolomite	Pyrite	Amorphous
1	D-1	8.5	1.4	0.3	—	1.0	64.5	24.3
2	D-2	13.2	1.7	0.7	1.2	0.7	50.5	32.0
3	D-3	2.1	—	2.0	—	—	80.6	15.3
4	D-4	0.9	—	1.3	0.3	—	88.7	18.8
5	D-5	1.2	—	0.7	0.8	—	79.1	18.2