Comparison of Crushed-Zone Skin Factor for Cased and Perforated Wells Calculated with and without including a Tip-Crushed Zone Effect

Table 2

The range of dimensionless parameters.

Dimensionless parameters and index properties	Values
Penetration ratio ()	0.125-0.5
Ratio of crushed zone radius to perforation radius ()	2-4
The crushed-zone damage permeability ratio ()	10-100
Porosity of skin zone	20%
Porosity of formation zone	25%