Normalised Normalized dimensionless difference between the sandface bottomhole pressure (BHP)
and
a reservoir pressure of a reference model of a full-entry vertical well with homogeneous
reservoir and non-damaged
near-well reservoir zone estimated at wellbore radius:
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S = \frac{p_{wf}(t) - p_{\rm ref}(t, r_w)}{ \left[ r \cdot \frac{\partial p_{ref}}{\partial r} \right]_{r=r_w} } |
where
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
.
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