Gas Displacement Engineering Test by Combination of Low and Medium Pressure Injection with Liquid CO₂ in High Gas and Low Permeability Coal Seam

Table 3

Table of low-pressure injection parameters.

Drilling name	Volume of injection (m^3)	Rate of flow (m^3/min)	Pressure rise rate (MPa/min)	Maximum pressure (MPa)	Dwell time (min)	Depressurization rate (MPa/min)	Minimum pressure (MPa)
1#­1L	2.0	0.028	0.020	0.70	105	0.010	0.17
1#­2L	1.8	0.038	0.069	1.50	38	0.008	0.42
2#­1L	1.8	0.040	0.048	0.95	58	0.040	0
2#­2L	2.0	0.030	0.041	1.30	12	0.022	0.11