Improved Hydraulic Fracturing Perforation Efficiency Observed with Constant Entry Hole and Constant Penetration Perforation
D. Cuthill, W. Yang, and J. Hardesty, GEODynamics, Inc.
Conventional perforating systems exhibit a distribution of perforation entry hole diameters around the circumference of the casing, when the system is decentralized within the wellbore. In the case of horizontal, limited entry, cluster style perforating operations the perforating system normally lies along the bottom of the casing. When hydraulically fracturing these intervals, perforation efficiency is difficult to predict since the entry hole diameters and perforation penetrations are not definitive.
A perforating system has been developed which provides a consistent entrance hole diameter and formation penetration independent of the clearance between the perforating carrier and casing...