Dynamic Brittle Instability Characteristics of 2000 m Deep Sandstone Influenced by Mineral Composition

Table 2

The main mineral composition of deep sandstone reservoir.

Number	SiO2 (%)	Al2O3 (%)	CaO (%)
S1-1	56.01	15.83	3.08
S1-2	54.8	16.5	3.23
S1-3	52.29	15.33	2.31
S1-4	49.35	16.81	2.57
S1-5	50.09	15.95	3.04
S1-6	55.61	15.55	2.88
S1-7	57.97	15.65	2.64
S1-8	53.73	16.35	2.53