Study and Verification of a Physical Simulation System for Formation Pressure Testing while Drilling

Table 1

Main mineral composition and content.

Number	Lithology	Mineral composition and content (%)
		Quartz	Orthoclase	Plagioclase	Calcite	Clay mineral
1	Fine siltstone	81.67	2.05	1.33	1.47	13.48
2	Fine siltstone	70.85	1.58	1.20	1.32	25.05
3	Fine siltstone	74.64	2.35	1.50	1.86	19.65
	Max.	81.67	2.35	1.50	1.86	25.05
	Min.	70.85	1.58	1.20	1.32	13.48
	Mean	75.72	1.99	1.34	1.55	19.39
4	Coarse siltstone	85.83	0.88	1.00	0.95	11.34
5	Coarse siltstone	76.80	1.06	0.90	0.95	20.30
6	Coarse siltstone	83.15	0.96	1.37	0.79	13.72
	Max.	85.83	1.06	1.37	0.95	20.30
	Min.	76.80	0.88	0.90	0.79	11.34
	Mean	81.93	0.97	1.09	0.90	15.12