Numerical Simulation and Modeling on CO₂ Sequestration Coupled with Enhanced Gas Recovery in Shale Gas Reservoirs

Table 1

List of model parameters.

Depth (m)	420
Thickness (m)	30.5
Matrix porosity	3.4%
Fracture porosity	0.1%
Matrix permeability (mD)	0.00015
Fracture permeability (mD)	0.004
Rock density (g·cm^-3)	2.4
Maximum adsorption mass CH4 (m^3·ton^-1)	3.3
Langmuir adsorption constant CH4 (1·Pa^-1)	0.00016
Maximum adsorption mass CO2 (m^3·ton^-1)	14.3
Langmuir adsorption constant CO2 (1·Pa^-1)	0.00013
Horizontal well length (m)	1,537.4
Hydraulic fracture conductivity (mD·m)	6,100
Half-length of hydraulic fracture (m)	137.2