Perforation skin factor

Input(s)

$s_{H}$ : Horizontal or Plane Flow Skin (dimensionless)

$s_{v}$ : Vertical or Converging Flow Skin (dimensionless)

$s_{w b}$ : Skin resulted by the Wellbore Effect (dimensionless)

$s_{p d}$ : Skin caused by the Damaged Zone around Perforation (dimensionless)

Output(s)

$s_{p}$: Perforation Skin (dimensionless)

Formula(s)

$$ s_{p}=s_{H}+s_{v}+s_{w b}+s_{p d} $$

Reference(s)

Bell, W. T., Sukup, R. A., \& Tariq, S. M. (1995). Perforating. Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers, Page: 65.