A Simple Approximation to the Pseudoskin Factor Resulting From Restricted Entry
Jan Vrbik · SPE Formation Evaluation · 1991
Summary Several procedures for computing the pseudoskin factor have been reported in the past, but they are either insufficiently accurate or require the use of a computer to perform the actual evaluation. This paper derives a simple formula that can achieve an accuracy quite sufficient for any practical application by means of a few approximations and use of an ordinary calculator.