Study on Double Pressure Funnels and Gas-Liquid Two-Way Mass Transfer after Fracturing in Shale Gas Reservoirs

Table 1

Basic parameters of a shale gas well.

Parameter	Value
Formation original pressure (MPa)	38.73
Gas diffusion coefficient, (m^3/s)	2.210^-7
Porosity	0.056
Formation thickness (s)	38
Well radius (m)	0.1
Number of fractures	20
Horizontal well length (m)	1000
Rectangle side length (m)	2000
Total fracturing fluid (m^3)	26639.4
Formation temperature (°C)	118.65
Gas compressibility (MPa^-1)	0.054
Matrix permeability (mD)	0.038
Fracturing fluid viscosity (MPa.s)	40
Compression coefficient (MPa^-1)	0.000413
Average half-length of fractures (m)	70
Methane content (%)	100
Rectangle side length (m)	600
Sand addition (m^3)	1206