perforation performance analysis

i need a manual on perforation performance analysis to increase upon well productivity
changing various perforation parameters....

This is an interesting presentation on Well Perforation:

[url]http://www.4shared.com/document/5koBIH1r/Well_Perforation.htm[/url]

There are various factors related to perforation performance Like :

1. Entry hole diameter
2. Total penetration depth
3. Shot density
4. Perforation interval

These again depend upon the rock and sand properties.
The best gun has to be chosen which gives best results of above four mentioned parameters against the rock and sand characteristics.