Constant entrance hole perforating gun system and method

A shaped charge for use in a perforating gun, said charge comprising a case, a liner positioned within said case, and an explosive filled within said liner;

• said liner shape configured with a subtended angle about an apex of said liner and an aspect ratio such that a jet formed with said explosive creates an entrance hole in a well casing;
• said subtended angle of said liner ranges from 100° to 120°;
• said liner having an exterior surface, said exterior surface substantially conical proximate said apex;
• said jet creates a perforation tunnel in a hydrocarbon formation;
• wherein a diameter of said jet is substantially equal to a diameter of a second jet created by a second shaped charge, a diameter of said entrance hole is substantially equal to a diameter of a second entrance hole created by said second charge, and a width and length of said perforation tunnel are substantially constant equal to a width and length of a second perforation tunnel created by said second charge in said second perforating gun.

A shaped charge for use in a perforating gun, said charge comprising a case, a liner positioned within said case, and an explosive filled within said liner;

• said liner shape configured with a subtended angle about an apex of said liner-such that a jet formed with said explosive creates an entrance hole in a well casing;
• said liner having an exterior surface, said exterior surface substantially straight and conically tapered to form said apex;
• said subtended angle of said liner ranges from 100° to 120°;
• said jet creates a perforation tunnel in a hydrocarbon formation;
• wherein a width and length of said perforation tunnel are substantially equal to a width and length of a second perforation tunnel created by said second charge.