Patent ID: 7909115
Filing Date: 2011-03-22
Classification: E21B

Abstract:
1. A method for perforating a formation interval in a well, comprising: disposing a shaped charge in the well proximate the formation interval, wherein the shaped charge comprises a liner formed of a dissolvable material selected from: iron, magnesium, zinc, aluminum, and any alloy or combination thereof; detonating the shaped charge to form a perforation tunnel in the formation interval and deposit a liner residue in the perforation tunnel; surging the perforation tunnel after detonating the shaped charge to remove liner residue from a wall region of the perforating tunnel; selecting a fluid adapted to dissolve the liner residue, the fluid being an acid selected from: hydrochloric acid, hydrofluoric acid, acetic acid, and formic acid; and pumping the fluid into contact with the perforation tunnel to dissolve the liner residue from a tip region of the perforation tunnel after the perforation tunnel has been surged.