The Visual and Quantitative Study of the Microoccurrence of Irreducible Water at the Pore and Throat System in a Low-Permeability Sandstone Reservoir by Using Microcomputerized Tomography

Table 2

XRD results of the core sample.

Clay minerals	Quartz	Plagioclase	Potash feldspar	Calcite	Illite	Chlorite
Wt. %	28.9	34.5	17.3	0.3	1.5	17.5