Perforation Prediction

RETINA stimulation™ penetration and entrance-hole diameter calculations are based on API section 1 and Berea slab experiments. All Berea penetrations are calculated from Section 1 via a curve fit to the related data. This data is then adjusted, using classical penetration theory. All penetration and entrance-hole computations are made assuming the shaped-charge jet impacts normal to the casing/cement/formation. Experimental data has been obtained in most cases to calculate entrance-hole diameter and penetration for large clearances. The flow of modifications performed on API sections to calculate formation penetration is presented here:

Flow of Modifications