A New Method for Research on Unsteady Pressure Dynamics and Productivity of Ultralow-Permeability Reservoirs

Table 5

Result interpretation table of the XJX-2Sa well.

Parameter	Value
Wellbore storage (m^3/MPa)	0.011
Skin factor	5.5
Permeability (mD)	5.33
Stress sensitivity coefficient (1/MPa)	0.002162
Threshold pressure gradient (MPa/m)	0.06813
Mud immersion rate	0.0005
Pollution damage coefficient	-0.12
Polluted well diameter (m)	30
Pressure recovery test lag time (h)	48