...
By definition the skin-factor is a pressure adjustment at the well-reservoir contact and does not affect pressure distribution in reservoir away from wellbore
| LaTeX Math Inline | ||
|---|---|---|
|
This means that skin-based pressure calculations in the damaged or in non-homogenous and non-radial-flow area around a well may become a bit inaccurate.
Nevertheless the size of a damaged area is usually much smaller than a drainage area during the well testing () the skin-factor concept works just fine for the most practical well tests applications.
The total skin is usually decomposed into a sum of two components:
...